1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
8 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
9 SMTP connection" log lines.
11 JH/02 Option default value updates:
12 - queue_fast_ramp (main) true (was false)
13 - remote_max_parallel (main) 4 (was 2)
15 JH/03 Cache static regex pattern compilations, for use by ACLs.
17 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
18 Make the rewrite never match and keep the logging. Trust the
19 admin to be using verify=header-syntax (to actually reject the message).
21 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
22 (under Linux) we watch the dir containing the final file; previously
23 it would be the dir with the first symlink. We still do not monitor
26 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
27 dn_expand() is happy to pass them through.
29 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
30 the file with the proof had an unchanged name, the new proof(s) were
31 loaded on top of the old ones (and nover used; the old ones were stapled).
33 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
34 more than one message arrived in a single connection a reference from
35 the earlier message could be re-used. Often a sigsegv resulted.
36 These variables were introduced in Exim 4.87.
37 Debug help from Graeme Fowler.
39 JH/09 Fix ${filter } for conditions that modify $value. Previously the
40 modified version would be used in construction the result, and a memory
43 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
44 Find and fix by Jasen Betts.
46 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
47 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
48 the systemwide configuration to override the Exim config.
50 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
51 API changes in libopendmarc.
53 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
54 pid 1, in the normal "background daemon" mode, having to drop process-
55 group leadership also lost track of needing to create listener sockets.
57 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
58 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
60 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
61 a capture group which obtained no text (eg. "(abc)*" matching zero
62 occurrences) could cause a segfault if the corresponding $<n> was
65 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
66 included a close-brace character (eg. it itself used an expansion) an
69 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
70 starting TLS. Previously it was after, meaning that attackers on such
71 ports had to be screened using the host_reject_connection main config
72 option. The new sequence aligns better with the STARTTLS behaviour, and
73 permits defences against crypto-processing load attacks, even though it
74 is strictly an incompatible change.
75 Also, avoid sending any SMTP fail response for either the connect ACL
76 or host_reject_connection, for TLS-on-connect ports.
78 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
79 Previously this was not permitted, but it makes reasonable sense.
80 While there, restore a restriction on using it from a connect ACL; given
81 the change JH/16 it could only return false (and before 4.91 was not
84 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
85 was exactly sized compared to the log buffer, a crash occurred with the
86 misleading message "bad memory reference; pool not found".
87 Found and traced by Jasen Betts.
89 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
90 dns_again_means_nonexist included an element causing a DNS lookup which
91 iteslf returned DNS_AGAIN, unbounded recursion occurred. Possible results
92 included (though probably not limited to) a process crash from stack
93 memory limit, or from excessive open files. Replace this with a paniclog
94 whine (as this is likely a configuration error), and returning
97 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
98 this always failed, probably leading to the usual downgrade to in-clear
101 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
102 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
103 to not checking that list for these lookups.
105 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
108 JH/23 Fix crash in string expansions. Previously, if an empty variable was
109 immediately followed by an expansion operator, a null-indirection read
110 was done, killing the process.
112 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
113 include an SMTP response string which is longer than that supported
114 by the delivering transport. Alleviate by wrapping such lines before
117 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
118 chars (RFC limit). Previously a limit of 12 items was made, which with
119 a not-impossible References: in the message being bounced could still
120 be over-large and get stopped in the transport.
122 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
123 close. Previously a bare socket close was done.
125 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
128 JH/28 Bug 2996: Fix a crash in the smtp transport. When finding that the
129 message being considered for delivery was already being handled by
130 another process, and having an SMTP connection already open, the function
131 to close it tried to use an uninitialized variable. This would afftect
132 high-volume sites more, especially when running mailing-list-style loads.
133 Pollution of logs was the major effect, as the other process delivered
134 the message. Found and partly investigated by Graeme Fowler.
136 JH/29 Change format of the internal ID used for message identification. The old
137 version only supported 31 bits for a PID element; the new 64 (on systems
138 which can use Base-62 encoding, which is all currently supported ones
139 but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
140 and must use Base-36). The new ID is 23 characters rather than 16, and is
141 visible in various places - notably logs, message headers, and spool file
142 names. Various of the ancillary utilities also have to know the format.
143 As well as the expanded PID portion, the sub-second part of the time
144 recorded in the ID is expanded to support finer precision. Theoretically
145 this permits a receive rate from a single comms channel of better than the
147 The major timestamp part of the ID is not changed; at 6 characters it is
148 usable until about year 3700.
149 Updating from previously releases is fully supported: old-format spool
150 files are still usable, and the utilities support both formats. New
151 message will use the new format. The one hints-DB file type which uses
152 message-IDs (the transport wait- DB) will be discarded if an old-format ID
153 is seen; new ones will be built with only new-format IDs.
154 Optionally, a utility can be used to convert spool files from old to new,
155 but this is only an efficiency measure not a requirement for operation
156 Downgrading from new to old requires running a provided utility, having
157 first stopped all operations. This will convert any spool files from new
158 back to old (losing time-precision and PID information) and remove any
159 wait- hints databases.
161 JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
162 we treated them as item separators when parsing for a list item, but they
163 need to be protected by the doublequotes. While there, add handling for
166 JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
167 Found and fixed by Jasen Betts. No testcase for this as my usual text
168 editor insists on emitting only valid UTF-8.
170 JH/32 Fix "tls_dhparam = none" under GnuTLS. At least with 3.7.9 this gave
171 a null-indirection SIGSEGV for the receive process.
173 JH/33 Fix free for live variable $value created by a ${run ...} expansion during
174 -bh use. Internal checking would spot this and take a panic.
176 JH/34 Bug 3013: Fix use of $recipients within arguments for ${run...}.
177 In 4.96 this would expand to empty.
179 JH/35 Bug 3014: GnuTLS: fix expiry date for an auto-generated server
180 certificate. Find and fix by Andreas Metzler.
186 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
187 after reception to before a subsequent reception. This should
188 mean slightly faster delivery, and also confirmation of reception
191 JH/02 Move from using the pcre library to pcre2. The former is no longer
192 being developed or supported (by the original developer).
194 JH/03 Constification work in the filters module required a major version
195 bump for the local-scan API. Specifically, the "headers_charset"
196 global which is visible via the API is now const and may therefore
197 not be modified by local-scan code.
199 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
200 sendfile() didi not account for the way the ClamAV driver code called it.
202 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
203 time check was being done for every character; replace that with one
206 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
207 sent was prefixed with a length byte.
209 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
210 RFC 5321. Previously Dovecot (at least) would log errors during
213 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
214 in 4.61 without a reason logged. Binaries will be bigger, which might
215 matter on diskspace-constrained systems, but debug is easier.
217 JH/09 Fix macro-definition during "-be" expansion testing. The move to
218 write-protected store for macros had not accounted for these runtime
219 additions; fix by removing this protection for "-be" mode.
221 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
222 handing out large-numbered file descriptors, violating the usual Unix
223 assumption (and required by Posix) that the lowest possible number will be
224 allocated by the kernel when a new one is needed. In the daemon, and any
225 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
226 are not useable for FD_SET() [and hence select()] and overwrite the stack.
227 Assorted crashes happen.
229 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
230 main-section options or in a connect ACL, the value from the first ever
231 connection was never replaced for subsequent connections. Found by
234 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
235 though only once PCRE2 was introduced: the memory accounting used under
236 debug offset allocations by an int, giving a hard trap in early startup.
237 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
239 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
240 with underbars is given. The write-protection of configuration introduced
241 in 4.95 trapped when normalisation was applied to an option not needing
244 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
246 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
247 failing to close the certificates directory, every hour or any time it
250 JH/16 Debugging initiated by an ACL control now continues through into routing
251 and transport processes. Previously debugging stopped any time Exim
252 re-execs, or for processing a queued message.
254 JH/17 The "expand" debug selector now gives more detail, specifically on the
255 result of expansion operators and items.
257 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
258 bad comparison between the option value and the name of the file to
259 be included was done, and a mismatch was wrongly identified.
260 4.88 to 4.95 are affected.
262 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
264 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
265 supplied as the db file-pair basename. Previously, if a directory
266 path was given, for example via the autoreply "once" option, the DB
267 file.pag and file.dir files would be created in that directory's
270 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
271 "taint" log_selector. These were previously deprecated.
273 JH/22 Fix static address-list lookups to properly return the matched item.
274 Previously only the domain part was returned.
276 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
277 the call into OpenSSL to send a TLS Close was being repeated; this
278 resulted in the library waiting for the peer's Close. If that was never
279 sent we waited forever. Fix by tracking send calls.
281 JH/24 The ${run} expansion item now expands its command string elements after
282 splitting. Previously it was before; the new ordering makes handling
283 zero-length arguments simpler. The old ordering can be obtained by
284 appending a new option "preexpand", after a comma, to the "run".
286 JH/25 Taint-check exec arguments for transport-initiated external processes.
287 Previously, tainted values could be used. This affects "pipe", "lmtp" and
288 "queryprogram" transport, transport-filter, and ETRN commands.
289 The ${run} expansion is also affected: in "preexpand" mode no part of
290 the command line may be tainted, in default mode the executable name
293 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
294 the the facility was not passed across execs, and only the first message
295 passed over a connection could use BDAT; any further ones using DATA.
297 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
298 uses $sending_ip_address and an interface is specified.
299 Previously any use of the local address in the EHLO name disabled
300 PIPECONNECT, the common case being to use the rDNS of it.
302 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
303 resumption. Previously verify failed because no certificate status is
304 passed on the wire for the restarted session. Fix by using the recorded
305 ocsp status of the stored session for the new connection.
307 JH/29 TLS resumption: the key for session lookup in the client now includes
308 more info that a server could potentially use in configuring a TLS
309 session, avoiding oferring mismatching sessions to such a server.
310 Previously only the server IP was used.
312 JH/30 Fix string_copyn() for limit greater than actual string length.
313 Previously the copied amount was the limit, which could result in a
314 overlapping memcpy for newly allocated destination soon after a
315 source string shorter than the limit. Found/investigated by KM.
317 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
318 close; it may be needed for a subsequent connection. This caused a
319 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
321 JH/32 Fix CHUNKING for a second message on a connection when the first was
322 rejected. Previously we did not reset the chunking-offered state, and
323 erroneously rejected the BDAT command. Investigation help from
326 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
327 an empty address. Previously the expansion returned an error.
329 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
330 proxy. Previously these were misparsed, leading to paniclog entries.
336 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
337 related applications. Previously an "H" was used where available info
338 says that "M" should be, so change to match.
340 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
341 as arguments, so an implementation trying to copy these into a local
342 buffer was taking a taint-enforcement trap. Fix by using dynamically
343 created buffers. Similar fix for radius expansion condition.
345 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
346 reasonable, eg. to count headers. Fix by using dynamically created
347 buffers rather than a local. Do similar fixes for ACL actions "dcc",
348 "log_reject_target", "malware" and "spam"; the arguments are expanded
349 so could be handling tainted values.
351 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
352 broken the (no-op) support for this sendmail command. Restore it
353 to doing nothing, silently, and returning good status.
355 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
356 record path was given (or the default used) without a leading directory
357 path, an error occurred on trying to open it. Use the transport's working
360 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
361 transport. Previously it was the name on the DNS A-record; use instead
362 the head of the CNAME chain leading there (if there is one). This seems
363 to align better with RFC 6125.
365 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
366 smtp_accept_max_per_host allocated resources which were not released
367 when the limit was exceeded. This eventually crashed the daemon. Fix
368 by adding a release action in that path.
370 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
371 expanded; previously using tainted values was rejected. Fix by using
372 dynamically-created buffers.
374 JH/09 Relax restrictions on ACL verify condition needing access to message
375 headers. Previously they were only permitted in data and non-smtp ACLs;
376 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
377 not_blind, header_sender and header_names_ascii verification.
379 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
380 Previously a macro used one argument twice; when called with the
381 argument as an expression having side-effects, incorrect operation
382 resulted. Use an inlineable function.
384 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
385 held open for a verify callout. Previously this wan not accounted for
386 and a corrupt onward SMTP conversation resulted.
388 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
389 Previously they were embedded naively in the constructed address; when
390 needed, strip the quoting and quote the entire local_part.
391 Also make the inbound_srs expansion condition handle quoting.
393 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
394 excluded, not matching the documentation.
396 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
397 was given for the sqlite_dbfile a trap resulted.
399 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
400 "name" argument resulted in a trap. There is no reason to disallow such;
401 this was a coding error.
403 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
404 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
405 spent suspended, ignoring the POSIX definition. Previously we assumed
406 it did and a constant offset from real time could be used as a correction.
407 Change to using the same clock source for the start-of-message and the
408 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
409 exists, just to get a clock slightly more aligned to reality.
411 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
412 RFC says it is optional some validators care. The missing char was not
413 intended but triggered by a line-wrap alignment. Discovery and fix by
414 Guillaume Outters, hacked on by JH.
416 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
417 name being quoted was tainted a trap would be taken. Fix by using
418 dynamically created buffers. The routine could have been called by a
419 rewrite with the "h" flag, by using the "-F" command-line option, or
420 by using a "name=" option on a control=submission ACL modifier.
422 JH/19 SPF: change the Authentication-Results expansion component to give
423 smtp.helo when the sender domain is empty. Previously it gave
426 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
427 not in 127.0.0.0/8 to help in spotting list domains taken over by a
428 domain-parking registrar.
430 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
431 Previously when a whitespace character was specified it was not inserted
432 after removing the newline.
434 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
435 the domain part of the recipient address. This overrides any tls_sni
436 option set, which was previously used.
438 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
441 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
442 is_tainted() had an off-by-one error in the overenthusiastic direction.
443 Find and fix by Gavan. Although NetBSD is not a supported platform for
444 4.94 this bug could affect other platforms.
446 PP/01 Fix default prime selection to be consistent.
447 One path used ike23 still, instead of exim.dev.20160529.3; now both
448 execution flows will use the same DH primes (currently
449 exim.dev.20160529.3).
451 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
452 option in smtp transport, to match the documentation. Previously
453 verification was not being done in some cases where it should have been.
455 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
456 than one server was defined and depending on the platform memory layout
457 details, an internal consistency trap could be hit while walking the list
460 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
461 files. The value is used by the authresults expansion item. Previously
462 if this was used in a router or transport, a crash could result.
464 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
465 have a sufficient incidence of EINTR returns from select that an
466 interaction with other operations done by the main daemon loop exposed
467 a bug in the error-handling. This was benign apart from the log
470 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
471 for consistency with delivered "=>" and failed "**" lines. While we're
472 there, handle PRX and TFO.
474 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
475 applied. This resulted, if any header-line rewrite rules were configured,
476 in a panic-log triggerable by sending a message with a long address in
477 a header. Fix by increasing the arbitrary limit to larger than a single
478 (dewrapped) 5322 header line maximum size.
480 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
481 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
482 RFC 6648 which deprecates X- options in protocols as a general practice.
483 Changeover between the implementations is handled by the mechanisms
486 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
487 a remote which uses callout/hold. Previously the local was queued.
489 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
492 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
493 log line. The asterisk is now consistently appended to the remote IP
494 (and port, if given), and will also be provided on defer and fail log
495 lines. Previously it could be placed on the local IP if that was being
496 logged, and was only provided on delivery lines.
498 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
500 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
501 authenticator client_send option. Previously the next char, after a pair
502 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
503 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
504 documentation. There is still no way to get a leading ^ immediately
505 after a NUL (ie. for the password of a PLAIN method authenticator.
507 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
508 files. For bad sizes read, delete the record and whine to paniclog.
510 JH/38 When logging an AUTH failure, as server, do not include sensitive
511 information. Previously, the credentials would be included if given
512 as part of the AUTH command line and an ACL denied authentication.
514 JH/39 Bug 2691: fix $local_part_data. When the matching list element
515 referred to a file, bad data was returned. This likely also affected
518 JH/40 The gsasl authenticator now supports caching of the salted password
519 generated by the client-side implementation. This required the addition
520 of a new variable: $auth4.
522 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
523 left undeleted; the attempt to re-create it then failed - resulting in
524 the usual "SIGHUP tp have daemon reload configuration" to not work.
525 This affected any platform not supporting "abstract" Unix-domain
526 sockets (i.e. not Linux).
528 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
529 recipients" response to RCPT in a later response, with a 250. The
530 previous coding assumed this would not happen, and under PIPELINING
531 would result in both lost and duplicate recipients for a message.
533 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
534 Previously the weighting was incorrectly applied. Similar fix for socks
535 proxies. Found and fixed by Heiko Schlichting.
537 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
538 not handle sub-lists included using the +namedlist syntax. While
539 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
540 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
543 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
544 Previously the permanent pool was used, so the sore could not be freed.
545 This meant a connection with many messages would use continually-growing
548 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
549 per-pool so as not to waste too much space. Previously a constant size
550 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
551 DOS attacks harder. The cost is wasted memory use in the larger blocks.
553 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
554 same space repeatedly, and a smaller process footprint.
556 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
557 for GnuTLS. Previously the name started "%s" which, while not a bug,
558 looked as if if might be one.
560 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
561 "continued connection") make the $proxy_* variables available. Previously
562 the information was not passed across the exec() call for subsequent
563 transport executions. This also mean that the log lines for the
564 messages can show the proxy information.
566 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
567 receive time. With modern systems the difference is significant.
568 The historical behaviour can be restored by disabling (a new) log_selector
569 "queue_time_exclusive".
571 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
572 content) were specifically tested for. Now, also cover expansions
573 resulting in ACL names and inline ACL content.
575 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
576 making it unusable in complex expressions.
578 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
579 fail with a taint-check on the spoolfile name, and leave the message
582 HS/01 Enforce absolute PID file path name.
584 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
586 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
588 PP/02 Bug 2643: Correct TLS DH constants.
589 A missing NUL termination in our code-generation tool had led to some
590 incorrect Diffie-Hellman constants in the Exim source.
591 Reported by kylon94, code-gen tool fix by Simon Arlott.
593 PP/03 Impose security length checks on various command-line options.
594 Fixes CVE-2020-SPRSS reported by Qualys.
596 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
597 better. Reported by Qualys.
599 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
600 providing a particularly obnoxious sender full name.
603 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
605 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
608 PP/08 Change default for recipients_max from unlimited to 50,000.
610 PP/09 Fix security issue with too many recipients on a message (to remove a
611 known security problem if someone does set recipients_max to unlimited,
612 or if local additions add to the recipient list).
613 Fixes CVE-2020-RCPTL reported by Qualys.
615 PP/10 Fix security issue in SMTP verb option parsing
616 Fixes CVE-2020-EXOPT reported by Qualys.
618 PP/11 Fix security issue in BDAT state confusion.
619 Ensure we reset known-good where we know we need to not be reading BDAT
620 data, as a general case fix, and move the places where we switch to BDAT
621 mode until after various protocol state checks.
622 Fixes CVE-2020-BDATA reported by Qualys.
624 HS/03 Die on "/../" in msglog file names
626 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
627 the Exim runtime user are allowed to create files.
629 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
632 QS/03 When reading the output from interpreted forward files we do not
633 pass the pipe between the parent and the interpreting process to
634 executed child processes (if any).
636 QS/04 Always die if requested from internal logging, even is logging is
639 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
640 the API; compilation noo longer completes with DMARC support included.
641 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
642 been reported on other platforms.
644 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
646 JH/56 Make the majority of info read from config files readonly, for defence-in-
647 depth against exploits. Suggestion by Qualys.
648 Not supported on Solaris 10.
650 JH/57 Fix control=fakreject for a custom message containing tainted data.
651 Previously this resulted in a log complaint, due to a re-expansion present
652 since fakereject was originally introduced.
654 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
655 modifier was given, a loop resulted.
657 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
658 pipelined SMTP command followed the BDAT LAST then it would be
659 incorrectly treated as part of the message body, causing a verification
662 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
663 require looser validation rules than those for 821-level addresses,
664 which only permit IP addresses.
670 JH/01 Avoid costly startup code when not strictly needed. This reduces time
671 for some exim process initialisations. It does mean that the logging
672 of TLS configuration problems is only done for the daemon startup.
674 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
676 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
677 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
680 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
681 DKIM signing is being done. Previously a transport_filter would always
682 disable CHUNKING, falling back to traditional DATA.
684 JH/05 Regard command-line recipients as tainted.
686 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
688 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
689 PAM library frees one of the arguments given to it, despite the
690 documentation. Therefore a plain malloc must be used.
692 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
693 on-stack buffers were used, resulting in a taint trap when DSN information
694 copied from a received message was written into the buffer.
696 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
697 the ordering of its ARC headers. This caused a crash.
699 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
700 a new record was being constructed with information from the peer, a trap
703 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
704 installation would get error messages from DMARC verify, when it hit the
705 nonexistent file indicated by the default. Distros wanting DMARC enabled
706 should both provide the file and set the option.
707 Also enforce no DMARC verification for command-line sourced messages.
709 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
710 could, depending on the platform, hang at the STARTTLS response.
712 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
713 message on a connection. Previously if one message had ARC headers and
714 the following one did not, a crash could result when adding an
715 Authentication-Results: header.
717 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
718 Exim main code and Exim-related utities. The introduction of taint
719 tracking also did many adjustments to string handling. Since then, eximon
720 frequently terminated with an assert failure.
722 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
723 check for 452 responses. This slightly helps the inefficieny of doing
724 a large alias-expansion into a recipient-limited target. The max_rcpt
725 transport option still applies (and at the current default, will override
726 the new feature). The check is done for either cause of synch, and forces
727 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
728 connection. The new facility is not tunable at this time.
730 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
731 library live data was being used, so the results became garbage. Make
732 copies while it is still usable.
734 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
735 on delivery deferred (==) and failed (**) lines (if a delivery was
736 attemtped). Previously it was only on completion (=>) lines.
738 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
739 for the expansion of the server_scram_iter and server_scram_salt options.
741 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
742 are now specifically given a NO_DATA response without hitting the system
743 resolver. The library goes on to do the now-standard TXT lookup.
744 Use of dnsdb lookups is not affected.
746 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
747 only retrieve the errormessage once. Previously two calls to dlerror()
748 were used, and the second one (for mainlog/paniclog) retrieved null
751 JH/20 Taint checking: disallow use of tainted data for
752 - the appendfile transport file and directory options
753 - the pipe transport command
754 - the autoreply transport file, log and once options
755 - file names used by the redirect router (including filter files)
757 - paths used by single-key lookups
758 Previously this was permitted.
760 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
761 adjusted the size of a major service buffer; this failed because the
762 buffer was in use at the time. Change to a compile-time increase in the
763 buffer size, when this authenticator is compiled into exim.
765 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
766 previous fast-mode was untenable in the face of glibs using mmap to
767 support larger malloc requests.
769 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
770 New values supported, if defined on system where compiled:
771 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
772 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
774 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
775 running a limited number of proceses in parallel, a benefit is gained. The
776 amount varies with the platform hardware and load. The use of the option
777 queue_run_in_order means we cannot do this, as ordering becomes
780 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
781 had introduced a string-copy (for ensuring NUL-termination) which was not
782 appropriate for that case, which can include embedded NUL bytes in the
783 block of data. Investigation showed the copy to actually be needless, the
784 data being length-specified.
786 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
787 done during a receiving connection, and both used TLS, global info was
788 used rather than per-connection info for tracking the state of data
789 queued for transmission. This could result in a connection hang.
791 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
792 Previously, when delivering serveral messages down a single connection
793 only the first would provide a SIZE. This was due to the size information
794 not being properly tracked.
796 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
797 TAI (at 37 seconds currently), pretend to be in UTC for time-related
798 expansion and logging. Previously, spurious values such as a future
799 minute could be seen.
801 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
802 it could crash from a null-deref. This could also affect the
803 ${addresses: } operator and ${readsock } item.
805 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
806 message following a mime one, the variable was not reset.
808 JH/30 When an pipelined-connect fails at the first response, assume incorrect
809 cached capability (perhaps the peer reneged?) and immediately retry in
812 JH/31 Fix spurious detection of timeout while writing to transport filter.
814 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
815 an attempt to copy the string was made before checking it.
817 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
818 taint of the lookup key was maintained; we now regard the presence in the
819 filesystem as sufficient validation.
821 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
822 argument is supplied.
824 JH/35 The dsearch lookup now requires that the directory is an absolute path.
825 Previously this was not checked, and nonempty relative paths made an
826 access under Exim's current working directory.
828 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
829 Previously no event was raised.
831 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
832 parameter supplied by the sender MAIL FROM command. Previously it was
833 ignored, and only the check_spool_space option value for the required
836 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
837 the size of the signing public-key. Previously it was instead giving
838 the size of the signature hash.
840 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
841 the default. See the (new) dkim_verify_min_keysizes option.
843 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
844 and an ACL use a lookup for checking either the local_part or domain,
845 stale data could be accessed. Ensure that variable references are
846 dropped between messages.
848 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
849 by the client was not checked as pointing within response data before
850 being used. A malicious client could thus cause an out-of-bounds read and
851 possibly gain authentication. Fix by adding the check.
853 JH/42 Internationalisation: change the default for downconversion in the smtp
854 transport to be "if needed". Previously it was "as previously set" for
855 the message, which usually meant "if needed" for message-submission but
856 "no" for everything else. However, MTAs have been seen using SMTPUTF8
857 even when the envelope addresses did not need it, resulting in forwarding
858 failures to non-supporting MTAs. A downconvert in such cases will be
859 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
860 transport. The change does mean that addresses needing conversion will
861 be converted when previously a delivery failure would occur.
863 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
864 response was received it would be used unchecked in a fail-DSN, violating
865 standards on line-length limits. Truncate if needed.
867 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
868 doesn't work. (Additionally add a new main config option to configure the
875 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
876 side, to decode a TLS 1.3 packet capture.
878 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
879 Previously the default library behaviour applied, sending two, each in
882 JH/03 Debug output for ACL now gives the config file name and line number for
885 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
887 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
889 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
890 buffer overrun for (non-chunking) other transports.
892 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
893 TLS1.3, means that a server rejecting a client certificate is not visible
894 to the client until the first read of encrypted data (typically the
895 response to EHLO). Add detection for that case and treat it as a failed
896 TLS connection attempt, so that the normal retry-in-clear can work (if
897 suitably configured).
899 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
900 and/or domain. Found and fixed by Jason Betts.
902 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
903 configuration). If a CNAME target was not a wellformed name pattern, a
906 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
907 the OS reports them interleaved with other addresses.
909 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
910 used both for input and for a verify callout, both encrypted, SMTP
911 responses being sent by the server could be lost. This resulted in
912 dropped connections and sometimes bounces generated by a peer sending
915 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
916 string. Previously it was possible to cause undefined behaviour in a
917 library routine (usually a crash). Found by "zerons".
919 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
922 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
923 API was removed, so update to use the newer ones.
925 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
926 any timeout set, is taking a long time. Previously we would hang on to a
927 rotated logfile "forever" if the input was arriving with long gaps
928 (a previous attempt to fix addressed lack, for a long time, of initial
931 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
932 shared (NFS) environment. The length of the tempfile name is now
933 4 + 16 ("hdr.$message_exim_id") which might break on file
934 systems which restrict the file name length to lower values.
937 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
938 shared (NFS) environment.
940 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
941 did for all versions <4.90). Notably -M, -m, --invert, -I may be
944 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
945 on some platforms for bit 31.
947 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
948 to changes apparently associated with TLS1.3 handling some of the APIs
949 previously used were either nonfunctional or inappropriate. Strings
950 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
951 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
952 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
953 This affects log line X= elements, the $tls_{in,out}_cipher variables,
954 and the use of specific cipher names in the encrypted= ACL condition.
956 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
958 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
959 verification result was not updated unless hosts_require_ocsp applied.
961 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
962 queue_list_requires_admin set to false, non-admin users were denied the
965 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
966 directory-of-certs mode. Previously they were advertised despite the
969 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
970 A single TCP connection by a client will now hold a TLS connection open
971 for multiple message deliveries, by default. Previously the default was to
974 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
975 default. If built with the facility, DANE will be used. The facility
976 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
978 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
979 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
980 must be defined and you must still, unless you define DISABLE_TLS, manage
981 the the include-dir and library-file requirements that go with that
982 choice. Non-TLS builds are still supported.
984 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
987 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
988 default. If the platform supports and has the facility enabled, it will
989 be requested on all coneections.
991 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
992 controlled by the build-time option SUPPORT_PIPE_CONNECT.
994 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
996 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
997 success-DSN messages. Previously the From: header was always the default
998 one for these; the option was ignored.
1000 JH/28 Fix the timeout on smtp response to apply to the whole response.
1001 Previously it was reset for every read, so a teergrubing peer sending
1002 single bytes within the time limit could extend the connection for a
1003 long time. Credit to Qualsys Security Advisory Team for the discovery.
1005 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
1006 delivery address, which leaked information of the results of local
1007 forwarding. Change to the original envelope recipient address, per
1010 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
1011 requested. Previously not bounce was generated and a log entry of
1012 error ignored was made.
1014 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
1016 JH/32 Introduce a general tainting mechanism for values read from the input
1017 channel, and values derived from them. Refuse to expand any tainted
1018 values, to catch one form of exploit.
1020 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
1021 was unused and the unexpanded text used for the test. Found and
1022 fixed by Ruben Jenster.
1024 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
1025 an attempt to use a TLS library read routine dereffed a nul pointer,
1028 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
1029 them in our smtp response.
1031 JH/36 Have the general router option retry_use_local_part default to true when
1032 any of the restrictive preconditions are set (to anything). Previously it
1033 was only for check_local user. The change removes one item of manual
1034 configuration which is required for proper retries when a remote router
1035 handles a subset of addresses for a domain.
1037 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
1038 link count into consideration.
1040 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
1041 caused the extension of big_buffer, the following lines were ignored.
1043 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
1044 accordance with RFC 2308. Previously there was no expiry, so a longlived
1045 receive process (eg. due to ACL delays) versus a short SOA value could
1048 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
1050 JH/39 Promote DMARC support to mainline.
1052 JH/40 Bug 2452: Add a References: header to DSNs.
1054 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1055 parameters. The relevant library call is documented as "Deprecated: This
1056 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1057 3.6.0, DH parameters are negotiated following RFC7919."
1059 HS/06 Change the default of dnssec_request_domains to "*"
1061 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1062 carried on and emitted a BDAT command, even when PIPELINING was not
1065 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1066 buffer was used for the filename, resulting in a trap when tainted
1067 arguments (eg. $domain) were used.
1069 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1070 recommended to avoid a possible server-load attack. The feature can be
1071 re-enabled via the openssl_options main cofiguration option.
1073 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1074 for version 4.90 - adding a "more data" boolean to the arguments.
1075 Bumped the ABI version number also, this having been missed previously;
1076 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1077 respect of usage of smtp_printf() by either local_scan code or libraries
1078 accessed via the ${dlfunc } expansion item. Both will need coding
1079 adjustment for any calls to smtp_printf() to match the new function
1080 signature; a FALSE value for the new argument is always safe.
1082 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1083 the file-offset (which the Linux syscall does, and exim expects); this
1084 resulted in an indefinite loop.
1086 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1087 to do ARC verification. The Authentication-Results: header line added
1088 by the configuration then had no ARC item.
1090 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1091 an incorrect mode was used for reading the result, resulting in it being
1098 JH/01 Remove code calling the customisable local_scan function, unless a new
1099 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1101 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1102 non-signal-safe functions being used.
1104 JH/03 Bug 2269: When presented with a received message having a stupidly large
1105 number of DKIM-Signature headers, disable DKIM verification to avoid
1106 a resource-consumption attack. The limit is set at twenty.
1108 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1109 report of oldest_pass in ${authres } in consequence, and separate out
1110 some descriptions of reasons for verification fail.
1112 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1113 files in the spool were present and unlocked. A queue-runner could spot
1114 them, resulting in a duplicate delivery. Fix that by doing the unlock
1115 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1116 add more error-checking on spoolfile handling while that code is being
1119 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1120 No known attacks, no CVE, this is defensive hardening.
1122 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1123 a queue-runner could start a delivery while other operations were ongoing.
1124 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1125 Found and investigated by Tim Stewart. Fix by using the open message data
1126 file handle rather than opening another, and not locally closing it (which
1127 releases a lock) for that case, while creating the temporary .eml format
1128 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1130 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1131 $sender_verify_failure/$recipient_verify_failure to "random".
1133 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1136 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1137 Previously this would segfault.
1139 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1142 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1143 like zero, since the resolver should be doing this for us, But we need one
1144 as a CNAME but no MX presence gets the CNAME returned; we need to check
1145 that doesn't point to an MX to declare it "no MX returned" rather than
1146 "error, loop". A new main option is added so the older capability of
1147 following some limited number of chain links is maintained.
1149 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1151 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1152 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1153 now-deprecated earlier definitions used only specified the range up to TLS
1154 1.2 (in the older-version library docs).
1156 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1158 JH/15 Rework TLS client-side context management. Stop using a global, and
1159 explicitly pass a context around. This enables future use of TLS for
1160 connections to service-daemons (eg. malware scanning) while a client smtp
1161 connection is using TLS; with cutthrough connections this is quite likely.
1163 JH/16 Fix ARC verification to do AS checks in reverse order.
1165 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1167 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1168 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1169 Previously the "utf8" would be re-prepended for every additional message.
1171 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1172 Previously thery were accepted, resulting in issues when attempting to
1173 forward messages to a non-supporting MTA.
1175 PP/02 Let -n work with printing macros too, not just options.
1177 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1178 one parent address was copied, and bogus data was used at delivery-logging
1179 time. Either a crash (after delivery) or bogus log data could result.
1180 Discovery and analysis by Tim Stewart.
1182 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1183 Previously if the string ended mid-character, we did not insert the
1184 promised '?' replacement.
1186 PP/04 Documentation: current string operators work on bytes, not codepoints.
1188 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1189 should pack well giving a smaller memory footprint so better caching and
1190 therefore performance. Group the declarations where this can't be done so
1191 that the byte-sized flag variables are not interspersed among pointer
1192 variables, giving a better chance of good packing by the compiler.
1194 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1195 non-null, to avoid issues with sites running BATV. Previously reports were
1196 sent with an empty envelope sender so looked like bounces.
1198 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1199 The ignore_error flag wasn't being returned from the filter subprocess so
1200 was not set for later routers. Investigation and fix by Matthias Kurz.
1202 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1203 and a msg:complete for the whole, when a message is manually removed using
1204 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1206 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1207 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1208 hope that is portable enough.
1210 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1211 requiring a known-CA anchor certificate; make it now rely entirely on the
1212 TLSA as an anchor. Checking the name on the leaf cert against the name
1213 on the A-record for the host is still done for TA (but not for EE mode).
1215 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1216 included in delivery lines for non-proxied connections, when compiled with
1217 SUPPORT_SOCKS and running with proxy logging enabled.
1219 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1220 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1221 move the existing event to fire before the normal logging of message
1222 failure so that custom logging is bracketed by normal logging.
1224 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1225 msg:fail:internal event. Developement by Matthias Kurz.
1227 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1228 far too small for todays use of crypto signatures stored there. Go all
1229 the way to the max DNS message size of 64kB, even though this might be
1230 overmuch for IOT constrained device use.
1232 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1233 copy a string over itself. The library routine is documented as not
1234 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1236 JH/32 For main options check_spool_space and check_inode_space, where the
1237 platform supports 64b integers, support more than the previous 2^31 kB
1238 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1239 the previous G, M, k.
1241 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1242 $authenticated_fail_id variable on authentication failure. Previously
1245 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1246 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1247 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1248 GNUTLS_SEC_PARAM_MEDIUM.
1250 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1251 side. Previously we would continue as if no SNI had been received.
1253 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1254 "<" character, which should be a list-separator specification, we walked
1255 off past the nul-terimation.
1257 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1258 causes) even when the retry time is not yet met. Previously they were
1259 not, meaning that when (say) an account was over-quota and temp-rejecting,
1260 and multiple senders' messages were queued, only one sender would get
1261 notified on each configured delay_warning cycle.
1263 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1265 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1266 cipher-suites, an error can be left on the stack even for a succeeding
1267 accept; this results in impossible error messages when a later operation
1270 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1271 return error codes indicating retry. Under TLS1.3 this becomes required.
1273 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1274 it only wrote the new authenticators, resulting in a lack of tracking of
1275 peer changes of ESMTP extensions until the next cache flush.
1277 JH/41 Fix the loop reading a message header line to check for integer overflow,
1278 and more-often against header_maxsize. Previously a crafted message could
1279 induce a crash of the recive process; now the message is cleanly rejected.
1281 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1282 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1288 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1289 When redis_servers is set to a list of > 1 element, and the Redis servers
1290 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1291 case of MOVED into a DEFER case instead, thus moving the query onto the
1292 next server in the list. For a cluster of N elements, all N servers must
1293 be defined in redis_servers.
1295 GF/02 Catch and remove uninitialized value warning in exiqsumm
1296 Check for existence of @ARGV before looking at $ARGV[0]
1298 JH/01 Replace the store_release() internal interface with store_newblock(),
1299 which internalises the check required to safely use the old one, plus
1300 the allocate and data copy operations duplicated in both (!) of the
1301 extant use locations.
1303 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1304 modifier. This matches the restriction on the commandline.
1306 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1307 Previously only the last row was returned.
1309 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1310 we assumed that tags in the header were well-formed, and parsed the
1311 element content after inspecting only the first char of the tag.
1312 Assumptions at that stage could crash the receive process on malformed
1315 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1316 While running the DKIM ACL we operate on the Permanent memory pool so that
1317 variables created with "set" persist to the DATA ACL. Also (at any time)
1318 DNS lookups that fail create cache records using the Permanent pool. But
1319 expansions release any allocations made on the current pool - so a dnsdb
1320 lookup expansion done in the DKIM ACL releases the memory used for the
1321 DNS negative-cache, and bad things result. Solution is to switch to the
1322 Main pool for expansions.
1323 While we're in that code, add checks on the DNS cache during store_reset,
1324 active in the testsuite.
1325 Problem spotted, and debugging aided, by Wolfgang Breyha.
1327 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1328 When none of the hosts presented to a transport match an already-open
1329 connection, close it and proceed with the list. Previously we would
1330 queue the message. Spotted by Lena with Yahoo, probably involving
1333 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1334 Previously a spurious "250 OK id=" response was appended to the proper
1337 JH/08 The "support for" informational output now, which built with Content
1338 Scanning support, has a line for the malware scanner interfaces compiled
1339 in. Interface can be individually included or not at build time.
1341 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1342 by the template makefile "src/EDITME". The "STREAM" support for an older
1343 ClamAV interface method is removed.
1345 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1346 rows affected is given instead).
1348 JH/11 The runtime Berkeley DB library version is now additionally output by
1349 "exim -d -bV". Previously only the compile-time version was shown.
1351 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1352 SMTP connection. Previously, when one had more recipients than the
1353 first, an abortive onward connection was made. Move to full support for
1354 multiple onward connections in sequence, handling cutthrough connection
1355 for all multi-message initiating connections.
1357 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1358 routers. Previously, a multi-recipient message would fail to match the
1359 onward-connection opened for the first recipient, and cause its closure.
1361 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1362 a timeout on read on a GnuTLS initiating connection, resulting in the
1363 initiating connection being dropped. This mattered most when the callout
1364 was marked defer_ok. Fix to keep the two timeout-detection methods
1367 JH/15 Relax results from ACL control request to enable cutthrough, in
1368 unsupported situations, from error to silently (except under debug)
1369 ignoring. This covers use with PRDR, frozen messages, queue-only and
1372 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1374 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1375 metadata, resulting in a crash in free().
1377 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1378 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1379 Broken also in d185889f4, with init system revamp.
1381 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1382 Previously we abruptly closed the connection after reading a malware-
1383 found indication; now we go on to read the "scan ok" response line,
1386 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1387 ACL. Previously, a crash would result.
1389 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1390 macro text after a replacement (previously it was only once per line) and
1391 by skipping builtin macros when searching for an uppercase lead character.
1393 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1394 for the build is renamed.
1396 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1397 was allocated for every new TLS startup, meaning one per message. Fix
1398 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1400 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1401 reported the original. Fix to report (as far as possible) the ACL
1402 result replacing the original.
1404 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1405 OpenSSL. Certificate information is loaded for every new TLS startup,
1406 and the resources needed to be freed.
1408 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1410 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1413 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1414 DATA response info to the (existing) per-recipient response info for
1415 the "C=" log element. It can have useful tracking info from the
1416 destination system. Patch from Simon Arlott.
1418 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1419 length value. Previously this would segfault.
1421 HS/02 Support Avast multiline protoocol, this allows passing flags to
1422 newer versions of the scanner.
1424 JH/28 Ensure that variables possibly set during message acceptance are marked
1425 dead before release of memory in the daemon loop. This stops complaints
1426 about them when the debug_store option is enabled. Discovered specifically
1427 for sender_rate_period, but applies to a whole set of variables.
1428 Do the same for the queue-runner and queue-list loops, for variables set
1429 from spool message files. Do the same for the SMTP per-message loop, for
1430 certain variables indirectly set in ACL operations.
1432 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1433 as a multi-recipient message from a mailinglist manager). The coding had
1434 an arbitrary cutoff number of characters while checking for more input;
1435 enforced by writing a NUL into the buffer. This corrupted long / fast
1436 input. The problem was exposed more widely when more pipelineing of SMTP
1437 responses was introduced, and one Exim system was feeding another.
1438 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1439 receiving system, and refused recipients seen by the sending system
1440 (propating to people being dropped from mailing lists).
1441 Discovered and pinpointed by David Carter.
1443 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1444 replaced by the ${authresults } expansion.
1446 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1448 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1449 allows proper process termination in container environments.
1451 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1452 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1454 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1455 and "err_perm", deprecated since 4.83 when the RFC-defined words
1456 "temperror" and "permerror" were introduced.
1458 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1459 transport-filters or DKIM-signing. The restriction was lost in the
1460 consolidation of verify-callout and delivery SMTP handling.
1461 Extend the restriction to also cover ARC-signing.
1463 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1464 in defer=pass mode supply a 450 to the initiator. Previously the message
1467 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1468 tls_require_ciphers is used as before.
1470 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1471 "pass_unscanned". Only tmpfails from the scanner are written to
1472 the paniclog, as they may require admin intervention (permission
1473 denied, license issues). Other scanner errors (like decompression
1474 bombs) do not cause a paniclog entry.
1476 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1477 Previously it was possible to log spurious information in receive log
1480 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1481 triggered odd behaviour from Outlook Express clients.
1483 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1486 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1487 since the IETF WG has not yet settled on that versus the original
1488 "bare" representation.
1490 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1491 Previously the millisecond value corrupted the output.
1492 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1493 corrupted the output.
1499 JH/01 Rework error string handling in TLS interface so that the caller in
1500 more cases is responsible for logging. This permits library-sourced
1501 string to be attached to addresses during delivery, and collapses
1502 pairs of long lines into single ones.
1504 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1505 during configuration. Wildcards are allowed and expanded.
1507 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1508 This permits better logging.
1510 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1511 do not close it down and have the child transport start it up again on
1512 the passed-on TCP connection. Instead, proxy the child (and any
1513 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1514 affected: the continued delivery log lines do not have any DNSSEC, TLS
1515 Certificate or OCSP information. TLS cipher information is still logged.
1517 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1518 identical IP addresses on different listening ports. Will also affect
1521 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1522 add noisy ifdef guards to special-case this sillyness.
1523 Patch from Bernd Kuhls.
1525 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1526 than 255 are no longer allowed.
1528 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1529 Disable the session-cache too, which might reduce our load. Since we
1530 currrectly use a new context for every connection, both as server and
1531 client, there is no benefit for these.
1532 GnuTLS appears to not support tickets server-side by default (we don't
1533 call gnutls_session_ticket_enable_server()) but client side is enabled
1534 by default on recent versions (3.1.3 +) unless the PFS priority string
1537 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1538 <https://reproducible-builds.org/specs/source-date-epoch/>.
1540 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1541 the check for any unsuccessful recipients did not notice the limit, and
1542 erroneously found still-pending ones.
1544 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1545 MSG_MORE. Only in-clear (not on TLS connections).
1547 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1548 transport-filter is involved we can buffer the headers in memory for
1549 creating the signature, and read the spool data file once for the
1550 signature and again for transmission.
1552 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1553 4.77 as the kernel support then wasn't solid, having issues in 64bit
1554 mode. Now, it's been long enough. Add support for FreeBSD also.
1556 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1557 case where the routing stage had gathered several addresses to send to
1558 a host before calling the transport for the first, we previously failed
1559 to close down TLS in the old transport process before passing the TCP
1560 connection to the new process. The new one sent a STARTTLS command
1561 which naturally failed, giving a failed delivery and bloating the retry
1562 database. Investigation and fix prototype from Wolfgang Breyha.
1564 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1565 false-negatives in the check that the sender had not preempted a response
1566 or prompt from Exim (running as a server), due to that code's lack of
1567 awareness of the SMTP input buffering.
1569 PP/04 Add commandline_checks_require_admin option.
1570 Exim drops privileges sanely, various checks such as -be aren't a
1571 security problem, as long as you trust local users with access to their
1572 own account. When invoked by services which pass untrusted data to
1573 Exim, this might be an issue. Set this option in main configuration
1574 AND make fixes to the calling application, such as using `--` to stop
1577 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1578 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1579 responses to those, into a single TLS record each way (this usually means
1580 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1583 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1584 affects you only if you're dancing at the edge of the param size limits.
1585 If you are, and this message makes sense to you, then: raise the
1586 configured limit or use OpenSSL 1.1. Nothing we can do for older
1589 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1590 cmdline element to get the documented default one. Previously it was
1593 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1594 are unsuable for non-message-specific reasons - eg. connection timeout,
1595 banner-time rejection.
1597 JH/16 Fix logging of delivery remote port, when specified by router, under
1600 PP/06 Repair manualroute's ability to take options in any order, even if one
1601 is the name of a transport.
1604 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1606 JH/17 Change the list-building routines interface to use the expanding-string
1607 triplet model, for better allocation and copying behaviour.
1609 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1610 Previously it was constructed the first time a possibly-matching string
1611 was met in the configuration file input during startup; now it is done
1614 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1615 compatible one, to avoid the (poorly documented) possibility of a config
1616 file in the working directory redirecting the DB files, possibly correpting
1617 some existing file. CVE-2017-10140 assigned for BDB.
1619 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1620 cache-hot. Previously, although the result was properly cached, the
1621 initial verify call returned a defer.
1623 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1624 the main verify for receipient in uncached-mode.
1626 JH/22 Retire historical build files to an "unsupported" subdir. These are
1627 defined as "ones for which we have no current evidence of testing".
1629 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1630 if present. Previously it was ignored.
1632 JH/24 Start using specified-initialisers in C structure init coding. This is
1633 a C99 feature (it's 2017, so now considered safe).
1635 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1636 if was a fixed-sized field and bitmask ops via macros; it is now more
1639 PP/07 GitHub PR 56: Apply MariaDB build fix.
1640 Patch provided by Jaroslav Škarvada.
1642 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1643 during Coverity cleanups [4.87 JH/47]
1644 Diagnosis and fix provided by Michael Fischer v. Mollard.
1646 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1647 the right size to place the terminating semicolon on its own folded
1648 line, the header hash was calculated to an incorrect value thanks to
1649 the (relaxed) space the fold became.
1651 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1652 and confused the parent.
1654 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1655 which could crash as a result. This could lead to undeliverable messages.
1657 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1660 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1661 matters on fast-turnover and PID-randomising systems, which were getting
1662 out-of-order delivery.
1664 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1665 a possibly-overlapping copy. The symptom was that "Remote host closed
1666 connection in response to HELO" was logged instead of the actual 4xx
1669 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1670 Previously only that bufferd was discarded, resulting in SYMTP command
1673 JH/32 DKIM: when a message has multiple signatures matching an identity given
1674 in dkim_verify_signers, run the dkim acl once for each. Previously only
1675 one run was done. Bug 2189.
1677 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1678 "panic the current process" to "deliberately defer". The panic log is
1679 still written with the problem list name; the mail and reject logs now
1680 get a temp-reject line for the message that was being handled, saying
1681 something like "domains check lookup or other defer". The SMTP 451
1682 message is still "Temporary local problem".
1684 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1685 A crafted sequence of BDAT commands could result in in-use memory beeing
1686 freed. CVE-2017-16943.
1688 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1689 from SMTP input. Previously it was always done; now only done for DATA
1690 and not BDAT commands. CVE-2017-16944.
1692 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1693 to the message (such as an overlong header line). Previously this was
1694 not done and we did not exit BDAT mode. Followon from the previous item
1695 though a different problem.
1701 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1702 than -2003 did; needs libidn2 in addition to libidn.
1704 JH/02 The path option on a pipe transport is now expanded before use.
1706 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1707 Patch provided by "Björn", documentation fix added too.
1709 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1710 missing a wire-to-host endian conversion.
1712 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1713 close after a BDAT command line could be taken as a following command,
1714 giving a synch failure. Fix by only checking for synch immediately
1715 before acknowledging the chunk.
1717 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1718 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1719 macro. Patches provided by Josh Soref.
1721 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1722 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1723 by IANA as a service extension. However, John Klensin suggests that we
1726 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1727 the dkim code may be unix-mode line endings rather than smtp wire-format
1728 CRLF, so prepend a CR to any bare LF.
1730 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1731 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1733 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1734 the first were themselves being wrongly included in the feed into dkim
1735 processing; with most chunk sizes in use this resulted in an incorrect
1736 body hash calculated value.
1738 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1739 DKIM signature block, for verification. Although advised against by
1740 standards it is specifically not ruled illegal.
1742 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1744 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1745 missing a body hash (the bh= tag).
1747 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1748 It seems that HAProxy sends the Proxy Protocol information in clear and
1749 only then does a TLS startup, so do the same.
1751 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1752 TCP connections (such as for Spamd) unless the daemon successfully set
1753 Fast Open mode on its listening sockets. This fixes breakage seen on
1754 too-old kernels or those not configured for Fast Open, at the cost of
1755 requiring both directions being enabled for TFO, and TFO never being used
1756 by non-daemon-related Exim processes.
1758 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1759 endings, at least on the first header line. Try to canonify any that get
1760 past that check, despite the cost.
1762 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1763 now limited to an arbitrary five deep, while parsing addresses with the
1764 strip_excess_angle_brackets option enabled.
1766 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1767 instead leave the unprompted TLS handshake in socket buffer for the
1768 TLS library to consume.
1770 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1772 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1774 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1775 region in one operation, for speed, and this leaves assigned pointers
1776 dangling. Add checks run only under the testsuite which checks all
1777 variables at a store-reset and panics on a dangling pointer; add code
1778 explicitly nulling out all the variables discovered. Fixes one known
1779 bug: a transport crash, where a dangling pointer for $sending_ip_address
1780 originally assigned in a verify callout, is re-used.
1782 PP/06 Drop '.' from @INC in various Perl scripts.
1784 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1786 PP/08 Reduce a number of compilation warnings under clang; building with
1787 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1788 should be warning-free.
1790 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1792 HS/01 Fix portability problems introduced by PP/08 for platforms where
1793 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1795 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1796 chunk. This allows us to accept broken chunked messages. We need a more
1797 general solution here.
1799 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1800 already-broken messages in the queue.
1802 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1804 JH/19 Fix reference counting bug in routing-generated-address tracking.
1810 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1811 supports it and a size is available (ie. the sending peer gave us one).
1813 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1814 years of being deprecated). The replacements are the ACLs
1815 acl_smtp_mime and acl_not_smtp_mime.
1817 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1818 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1819 or even an in-clear connection were permitted. Now, if the host lookup
1820 was dnssec and dane was requested then the host is only used if the
1821 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1822 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1823 if one fails this test.
1824 This means that a poorly-configured remote DNS will make it incommunicado;
1825 but it protects against a DNS-interception attack on it.
1827 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1828 non-noisy when a race steals the message being considered.
1830 JH/05 If main configuration option tls_certificate is unset, generate a
1831 self-signed certificate for inbound TLS connections.
1833 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1834 in rewrites and routers.
1836 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1837 and logged a warning sing 4.83; now they are a configuration file error.
1839 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1840 (lacking @domain). Apply the same qualification processing as RCPT.
1842 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1844 JH/10 Support ${sha256:} applied to a string (as well as the previous
1847 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1848 a cutthrough deliver is pending, as we always want to make a connection.
1849 This also avoids re-routing the message when later placing the cutthrough
1850 connection after a verify cache hit.
1851 Do not update it with the verify result either.
1853 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1854 when routing results in more than one destination address.
1856 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1857 signing (which inhibits the cutthrough capability). Previously only
1858 the presence of an option was tested; now an expansion evaluating as
1859 empty is permissible (obviously it should depend only on data available
1860 when the cutthrough connection is made).
1862 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1863 the relevant preceding SMTP command did not note the pipelining mode.
1865 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1866 Previously they were not counted.
1868 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1869 as one having no matching records. Previously we deferred the message
1870 that needed the lookup.
1872 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1873 distinguished as "(=".
1875 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1876 for missing MX records. Previously it only worked for missing A records.
1878 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1880 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1881 after the data-go-ahead and data-ack. Patch from Jason Betts.
1883 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1884 even for a "none" policy. Patch from Tony Meyer.
1886 JH/22 Fix continued use of a connection for further deliveries. If a port was
1887 specified by a router, it must also match for the delivery to be
1890 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1891 When one of the recipients of a message was unsuitable for the connection
1892 (has no matching addresses), we lost track of needing to mark it
1893 deferred. As a result mail would be lost.
1895 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1897 JH/25 Decoding ACL controls is now done using a binary search; the source code
1898 takes up less space and should be simpler to maintain. Merge the ACL
1899 condition decode tables also, with similar effect.
1901 JH/26 Fix problem with one_time used on a redirect router which returned the
1902 parent address unchanged. A retry would see the parent address marked as
1903 delivered, so not attempt the (identical) child. As a result mail would
1906 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1907 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1908 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1911 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1912 Main config options check_{log,spool}_{inodes,space} are now
1913 100 inodes, 10MB unless set otherwise in the configuration.
1915 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1916 Previously it only applied to the main-section connection policy
1919 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1921 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1922 by me. Added RFC7919 DH primes as an alternative.
1924 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1925 are not in the system include path.
1927 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1928 GnuTLS, when a session startup failed (eg because the client disconnected)
1929 Exim did stdio operations after fclose. This was exposed by a recent
1930 change which nulled out the file handle after the fclose.
1932 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1933 signed directly by the cert-signing cert, rather than an intermediate
1934 OCSP-signing cert. This is the model used by LetsEncrypt.
1936 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1938 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1939 an incoming connection.
1941 HS/02 Bug 1802: Do not half-close the connection after sending a request
1944 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1945 fallback to "prime256v1".
1947 JH/34 SECURITY: Use proper copy of DATA command in error message.
1948 Could leak key material. Remotely exploitable. CVE-2016-9963.
1954 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1955 and 3.4.4 - once the server is enabled to respond to an OCSP request
1956 it does even when not requested, resulting in a stapling non-aware
1957 client dropping the TLS connection.
1959 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1960 support variable-length bit vectors. No functional change.
1962 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1963 The I= interface field on outgoing lines is now after the H= remote
1964 host field, same as incoming lines. There is a separate
1965 outgoing_interface log selector which allows you to disable the
1968 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1969 If not running log_selector +smtp_connection the mainlog would be held
1970 open indefinitely after a "too many connections" event, including to a
1971 deleted file after a log rotate. Leave the per net connection logging
1972 leaving it open for efficiency as that will be quickly detected by the
1973 check on the next write.
1975 HS/01 Bug 1671: Fix post transport crash.
1976 Processing the wait-<transport> messages could crash the delivery
1977 process if the message IDs didn't exist for some reason. When
1978 using 'split_spool_directory=yes' the construction of the spool
1979 file name failed already, exposing the same netto behaviour.
1981 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1982 mime_regex ACL conditions.
1984 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1985 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1986 to HELO, local diagnostic string.
1988 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1989 log line to debug. Even when configured with a tls authenticator many
1990 client connections are expected to not authenticate in this way, so
1991 an authenticate fail is not an error.
1993 HS/02 Add the Exim version string to the process info. This way exiwhat
1994 gives some more detail about the running daemon.
1996 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1997 matter for fast-change records such as DNSBLs.
1999 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
2000 retry record, even if constant. There may be multiple transports with
2001 different interface settings and the retry behaviour needs to be kept
2004 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
2006 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
2008 JH/10 Bug 840: fix log_defer_output option of pipe transport
2010 JH/11 Bug 830: use same host for all RCPTS of a message, even under
2011 hosts_randomize. This matters a lot when combined with mua_wrapper.
2013 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
2014 ${quote_pgsql:<string>} operator.
2016 JH/13 Bug 1708: avoid misaligned access in cached lookup.
2018 JH/14 Change header file name for freeradius-client. Relevant if compiling
2019 with Radius support; from the Gentoo tree and checked under Fedora.
2021 JH/15 Bug 1712: Introduce $prdr_requested flag variable
2023 JH/16 Bug 1714: Permit an empty string as expansion result for transport
2024 option transport_filter, meaning no filtering.
2026 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
2028 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
2029 defaults to "*" (all hosts). The variable is now available when not built
2030 with TLS, default unset, mainly to enable keeping the testsuite sane.
2031 If a server certificate is not supplied (via tls_certificate) an error is
2032 logged, and clients will find TLS connections fail on startup. Presumably
2033 they will retry in-clear.
2034 Packagers of Exim are strongly encouraged to create a server certificate
2035 at installation time.
2037 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
2038 with the $config_file variable.
2040 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
2041 in transport context, after the attempt, and per-recipient. The latter type
2042 is per host attempted. The event data is the error message, and the errno
2043 information encodes the lookup type (A vs. MX) used for the (first) host,
2044 and the trailing two digits of the smtp 4xx response.
2046 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
2047 to write to mainlog (or rejectlog, paniclog) in the window between file
2048 creation and permissions/ownership being changed. Particularly affects
2049 installations where exicyclog is run as root, rather than exim user;
2050 result is that the running daemon panics and dies.
2052 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2054 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2055 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2056 "pri" and "weight". Note that the previous implicit priority given by the
2057 list order is no longer honoured.
2059 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2060 for DKIM processing.
2062 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2063 by defining SUPPORT_SOCKS.
2065 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2066 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2067 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2068 variables are renamed to proxy_{local,external}_{address,port}.
2070 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2071 for a build by defining SUPPORT_I18N
2073 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2074 of the query string, and make ${quote_redis:} do that quoting.
2076 JH/29 Move Events support from Experimental to mainline, enabled by default
2077 and removable for a build by defining DISABLE_EVENT.
2079 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2081 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2082 cached by the daemon.
2084 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2085 by defining LOOKUP_REDIS. The libhiredis library is required.
2087 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2088 keys are given for lookup.
2090 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2091 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2092 only supported when built with TLS support. The PolarSSL SHA routines
2093 are still used when the TLS library is too old for convenient support.
2095 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2096 openssl_options), for security. OpenSSL forces this from version 1.1.0
2097 server-side so match that on older versions.
2099 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2100 allocation for $value could be released as the expansion processing
2101 concluded, but leaving the global pointer active for it.
2103 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2104 and to use the domains and local_parts ACL conditions.
2106 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2107 incorrectly not doubled on cutthrough transmission, hence seen as a
2108 body-termination at the receiving system - resulting in truncated mails.
2109 Commonly the sender saw a TCP-level error, and retransmitted the message
2110 via the normal store-and-forward channel. This could result in duplicates
2111 received - but deduplicating mailstores were liable to retain only the
2112 initial truncated version.
2114 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2116 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2118 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2119 we're in there, support oversigning also; bug 1309.
2121 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2123 HS/04 Add support for keep_environment and add_environment options.
2125 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2126 either intentional arithmetic overflow during PRNG, or testing config-
2129 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2130 delivery resulted in actual delivery. Cancel cutthrough before DATA
2133 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2134 rejects a recipient: pass the reject to the originator.
2136 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2137 Many were false-positives and ignorable, but it's worth fixing the
2140 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2141 for the new environment-manipulation done at startup. Move the routines
2142 from being local to tls.c to being global via the os.c file.
2144 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2145 an extract embedded as result-arg for a map, the first arg for extract
2146 is unavailable so we cannot tell if this is a numbered or keyed
2147 extraction. Accept either.
2153 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2156 JH/02 The smtp transport option "multi_domain" is now expanded.
2158 JH/03 The smtp transport now requests PRDR by default, if the server offers
2161 JH/04 Certificate name checking on server certificates, when exim is a client,
2162 is now done by default. The transport option tls_verify_cert_hostnames
2163 can be used to disable this per-host. The build option
2164 EXPERIMENTAL_CERTNAMES is withdrawn.
2166 JH/05 The value of the tls_verify_certificates smtp transport and main options
2167 default to the word "system" to access the system default CA bundle.
2168 For GnuTLS, only version 3.0.20 or later.
2170 JH/06 Verification of the server certificate for a TLS connection is now tried
2171 (but not required) by default. The verification status is now logged by
2172 default, for both outbound TLS and client-certificate supplying inbound
2175 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2178 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2179 Status Notification (bounce) messages are now MIME format per RFC 3464.
2180 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2181 under the control of the dsn_advertise_hosts option, and routers may
2182 have a dsn_lasthop option.
2184 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2185 default, modifiable by a malware= option. The list separator for
2186 the options can now be changed in the usual way. Bug 68.
2188 JH/10 The smtp_receive_timeout main option is now expanded before use.
2190 JH/11 The incoming_interface log option now also enables logging of the
2191 local interface on delivery outgoing connections.
2193 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2194 if the interface and destination host and port all match.
2196 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2199 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2200 Patch from Andrew Lewis.
2202 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2203 now supports optional time-restrictions, weighting, and priority
2204 modifiers per server. Patch originally by <rommer@active.by>.
2206 JH/16 The spamd_address main option now supports a mixed list of local
2207 and remote servers. Remote servers can be IPv6 addresses, and
2208 specify a port-range.
2210 JH/17 Bug 68: The spamd_address main option now supports an optional
2211 timeout value per server.
2213 JH/18 Bug 1581: Router and transport options headers_add/remove can
2214 now have the list separator specified.
2216 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2219 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2222 JH/21 Support for the A6 type of dns record is withdrawn.
2224 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2225 rather than the verbs used.
2227 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2228 from 255 to 1024 chars.
2230 JH/24 Verification callouts now attempt to use TLS by default.
2232 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2233 are generic router options now. The defaults didn't change.
2235 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2236 Original patch from Alexander Shikoff, worked over by JH.
2238 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2239 files if ZCAT_COMMAND is not executable.
2241 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2243 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2245 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2246 Normally benign, it bites when the pair was led to by a CNAME;
2247 modern usage is to not canonicalize the domain to a CNAME target
2248 (and we were inconsistent anyway for A-only vs AAAA+A).
2250 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2252 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2253 when evaluating $sender_host_dnssec.
2255 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2256 $sender_helo_dnssec variable.
2258 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2260 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2262 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2264 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2265 documented as working, but never had. Support all but $spam_report.
2267 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2268 added for tls authenticator.
2270 HS/03 Add perl_taintmode main config option
2276 TL/01 When running the test suite, the README says that variables such as
2277 no_msglog_check are global and can be placed anywhere in a specific
2278 test's script, however it was observed that placement needed to be near
2279 the beginning for it to behave that way. Changed the runtest perl
2280 script to read through the entire script once to detect and set these
2281 variables, reset to the beginning of the script, and then run through
2282 the script parsing/test process like normal.
2284 TL/02 The BSD's have an arc4random API. One of the functions to induce
2285 adding randomness was arc4random_stir(), but it has been removed in
2286 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2287 function when detected.
2289 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2290 cause callback expansion.
2292 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2293 syntax errors in an expansion can be treated as a string instead of
2294 logging or causing an error, due to the internal use of bool_lax
2295 instead of bool when processing it.
2297 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2298 server certificates when making smtp deliveries.
2300 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2302 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2304 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2306 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2307 Merged patch from Sebastian Wiedenroth.
2309 JH/05 Fix results-pipe from transport process. Several recipients, combined
2310 with certificate use, exposed issues where response data items split
2311 over buffer boundaries were not parsed properly. This eventually
2312 resulted in duplicates being sent. This issue only became common enough
2313 to notice due to the introduction of connection certificate information,
2314 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2316 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2317 size buffer was used, resulting in syntax errors when an expansion
2320 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2321 version 3.3.6 or later.
2323 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2324 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2325 both become "event_action", the variables become $event_name, $event_data
2326 and $event_defer_errno. There is a new variable $verify_mode, usable in
2327 routers, transports and related events. The tls:cert event is now also
2328 raised for inbound connections, if the main configuration event_action
2331 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2332 early OCSP support, but no stapling (appears to be less than 1.0.0).
2334 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2335 server certificate names available under the smtp transport option
2336 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2339 JH/10 Time-related extraction expansions from certificates now use the main
2340 option "timezone" setting for output formatting, and are consistent
2341 between OpenSSL and GnuTLS compilations. Bug 1541.
2343 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2344 encoded parameter in the incoming message. Bug 1558.
2346 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2347 include certificate info, eximon was claiming there were spoolfile
2350 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2352 JH/14 Log delivery-related information more consistently, using the sequence
2353 "H=<name> [<ip>]" wherever possible.
2355 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2356 are problematic for Debian distribution, omit them from the release
2359 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2361 JH/16 Fix string representation of time values on 64bit time_t architectures.
2364 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2365 output list separator was used.
2370 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2371 checkers that were complaining about end of non-void function with no
2374 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2375 This was a regression introduced in 4.83 by another bugfix.
2377 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2379 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2380 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2386 TF/01 Correctly close the server side of TLS when forking for delivery.
2388 When a message was received over SMTP with TLS, Exim failed to clear up
2389 the incoming connection properly after forking off the child process to
2390 deliver the message. In some situations the subsequent outgoing
2391 delivery connection happened to have the same fd number as the incoming
2392 connection previously had. Exim would try to use TLS and fail, logging
2393 a "Bad file descriptor" error.
2395 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2396 utilities have not been installed.
2398 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2399 temporary space as the ACL may create new global variables.
2401 TL/01 LDAP support uses per connection or global context settings, depending
2402 upon the detected version of the libraries at build time.
2404 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2405 to extract and use the src ip:port in logging and expansions as if it
2406 were a direct connection from the outside internet. PPv2 support was
2407 updated based on HAProxy spec change in May 2014.
2409 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2411 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2412 Properly escape header and check for NULL return.
2414 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2417 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2419 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2420 characters in header names, implemented as a verify condition.
2421 Contributed by Michael Fischer v. Mollard.
2423 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2424 results permerror and temperror. Previous values are deprecated but
2425 still accepted. In a future release, err_perm and err_temp will be
2426 completely removed, which will be a backward incompatibility if the
2427 ACL tests for either of these two old results. Patch contributed by
2428 user bes-internal on the mailing list.
2430 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2432 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2433 selectors, in both main and reject logs.
2435 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2438 JH/07 Add malware type "sock" for talking to simple daemon.
2440 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2442 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2443 routers/transports under cutthrough routing.
2445 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2446 numbers. Touch up "bool" conditional to keep the same definition.
2448 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2450 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2452 JH/12 Expand items in router/transport headers_add or headers_remove lists
2453 individually rather than the list as a whole. Bug 1452.
2455 Required for reasonable handling of multiple headers_ options when
2456 they may be empty; requires that headers_remove items with embedded
2457 colons must have them doubled (or the list-separator changed).
2459 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2460 view the policy declared in the DMARC record. Currently, $dmarc_status
2461 is a combined value of both the record presence and the result of the
2464 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2466 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2467 dnslookup router and the smtp transport (applying to the forward
2470 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2471 of ldap servers used for a specific lookup. Patch provided by Heiko
2474 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2475 New variable $lookup_dnssec_authenticated for observability.
2477 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2478 Patch submitted by Lars Timman.
2480 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2482 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2483 Requires trusted mode and valid format message id, aborts otherwise.
2484 Patch contributed by Heiko Schlichting.
2486 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2487 certextract with support for various fields. Bug 1358.
2489 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2490 is requested by default, modifiable by smtp transport option
2493 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2494 operate on certificate variables to give certificate fingerprints
2495 Also new ${sha256:cert_variable}.
2497 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2499 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2500 Christian Aistleitner.
2502 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2504 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2505 file. Patch from Wolfgang Breyha.
2507 JH/25 Expand the coverage of the delivery $host and $host_address to
2508 client authenticators run in verify callout. Bug 1476.
2510 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2511 align with daemon_smtp_ports. Bug 72.
2513 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2514 support and error reporting did not work properly.
2516 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2517 and is readable. Patch from Andrew Colin Kissa.
2519 TL/14 Enhance documentation of ${run expansion and how it parses the
2520 commandline after expansion, particularly in the case when an
2521 unquoted variable expansion results in an empty value.
2523 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2525 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2526 by renaming away from it. Addresses GH issue 15, reported by
2529 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2531 TL/15 SECURITY: prevent double expansion in math comparison functions
2532 (can expand unsanitized data). Not remotely exploitable.
2539 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2541 PP/02 Make -n do something, by making it not do something.
2542 When combined with -bP, the name of an option is not output.
2544 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2547 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2548 $sender_host_name and config options to manage this, and basic check
2551 PP/05 DSCP support for outbound connections and control modifier for inbound.
2553 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2554 (Only plugin which currently uses this is kerberos4, which nobody should
2555 be using, but we should make it available and other future plugins might
2556 conceivably use it, even though it would break NAT; stuff *should* be
2557 using channel bindings instead).
2559 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2560 name; added for Sendmail compatibility; requires admin caller.
2561 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2562 just ignore it); requires trusted caller.
2563 Also parse but ignore: -Ac -Am -X<logfile>
2566 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2568 TL/02 Add +smtp_confirmation as a default logging option.
2570 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2571 Patch by Magnus Holmgren from 2007-02-20.
2573 TL/04 Bugzilla 1281 - Spec typo.
2574 Bugzilla 1283 - Spec typo.
2575 Bugzilla 1290 - Spec grammar fixes.
2577 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2579 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2581 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2582 mailing list by by Dmitry Isaikin.
2584 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2586 JH/02 Support "G" suffix to numbers in ${if comparisons.
2588 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2590 NM/01 Bugzilla 1197 - Spec typo
2591 Bugzilla 1196 - Spec examples corrections
2593 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2595 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2596 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2599 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2600 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2602 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2603 "acl {{name}{arg}...}", and optional args on acl condition
2606 JH/05 Permit multiple router/transport headers_add/remove lines.
2608 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2610 JH/07 Avoid using a waiting database for a single-message-only transport.
2611 Performance patch from Paul Fisher. Bugzilla 1262.
2613 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2616 JH/09 Add $headers_added variable, with content from use of ACL modifier
2617 add_header (but not yet added to the message). Bugzilla 199.
2619 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2620 Pulled from Bugzilla 817 by Wolfgang Breyha.
2622 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2624 (nb: this is the same fix as in Exim 4.80.1)
2626 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2629 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2632 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2634 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2635 advertise SMTP AUTH mechanism to us, instead of a generic
2636 protocol violation error. Also, make Exim more robust to bad
2637 data from the Dovecot auth socket.
2639 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2641 When a queue runner is handling a message, Exim first routes the
2642 recipient addresses, during which it prunes them based on the retry
2643 hints database. After that it attempts to deliver the message to
2644 any remaining recipients. It then updates the hints database using
2647 So if a recipient address works intermittently, it can get repeatedly
2648 deferred at routing time. The retry hints record remains fresh so the
2649 address never reaches the final cutoff time.
2651 This is a fairly common occurrence when a user is bumping up against
2652 their storage quota. Exim had some logic in its local delivery code
2653 to deal with this. However it did not apply to per-recipient defers
2654 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2656 This change adds a proper retry rule check during routing so that the
2657 final cutoff time is checked against the message's age. We only do
2658 this check if there is an address retry record and there is not a
2659 domain retry record; this implies that previous attempts to handle
2660 the address had the retry_use_local_parts option turned on. We use
2661 this as an approximation for the destination being like a local
2662 delivery, as in LMTP.
2664 I suspect this new check makes the old local delivery cutoff check
2665 redundant, but I have not verified this so I left the code in place.
2667 TF/02 Correct gecos expansion when From: is a prefix of the username.
2669 Test 0254 submits a message to Exim with the header
2673 When I ran the test suite under the user fanf2, Exim expanded
2674 the header to contain my full name, whereas it should have added
2675 a Resent-Sender: header. It erroneously treats any prefix of the
2676 username as equal to the username.
2678 This change corrects that bug.
2680 GF/01 DCC debug and logging tidyup
2681 Error conditions log to paniclog rather than rejectlog.
2682 Debug lines prefixed by "DCC: " to remove any ambiguity.
2684 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2686 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2687 Bug spotted by Jeremy Harris; was flawed since initial commit.
2688 Would have resulted in OCSP responses post-SNI triggering an Exim
2689 NULL dereference and crash.
2691 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2693 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2694 Bug detection, analysis and fix by Samuel Thibault.
2695 Bugzilla 1331, Debian bug #698092.
2697 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2699 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2700 Server implementation by Todd Lyons, client by JH.
2701 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2702 config variable "prdr_enable" controls whether the server
2703 advertises the facility. If the client requests PRDR a new
2704 acl_data_smtp_prdr ACL is called once for each recipient, after
2705 the body content is received and before the acl_smtp_data ACL.
2706 The client is controlled by both of: a hosts_try_prdr option
2707 on the smtp transport, and the server advertisement.
2708 Default client logging of deliveries and rejections involving
2709 PRDR are flagged with the string "PRDR".
2711 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2712 fclose(). Diagnosis by Todd Lyons.
2714 PP/17 Update configure.default to handle IPv6 localhost better.
2715 Patch by Alain Williams (plus minor tweaks).
2718 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2719 This is now consistent with GnuTLS, and is now documented: the
2720 previous undocumented portable approach to treating the option as
2721 unset was to force an expansion failure. That still works, and
2722 an empty string is now equivalent.
2724 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2725 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2726 not performing validation itself.
2728 PP/20 Added force_command boolean option to pipe transport.
2729 Patch from Nick Koston, of cPanel Inc.
2731 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2734 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2736 PP/21 Fix eximon continuous updating with timestamped log-files.
2737 Broken in a format-string cleanup in 4.80, missed when I repaired the
2738 other false fix of the same issue.
2739 Report and fix from Heiko Schlichting.
2742 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2743 Report from Prashanth Katuri.
2745 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2746 It's SecureTransport, so affects any MacOS clients which use the
2747 system-integrated TLS libraries, including email clients.
2749 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2750 using a MIME ACL for non-SMTP local injection.
2751 Report and assistance in diagnosis by Warren Baker.
2753 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2755 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2757 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2758 last id that failed so it may be referenced in subsequent ACL's.
2760 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2763 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2764 ldap library initialization, allowing self-signed CA's to be
2765 used. Also properly sets require_cert option later in code by
2766 using NULL (global ldap config) instead of ldap handle (per
2767 session). Bug diagnosis and testing by alxgomz.
2769 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2770 the src/util/ subdirectory.
2772 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2773 renamed to Transport Post Delivery Action by Jeremy Harris, as
2776 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2777 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2778 redis_servers = needs to be configured which will be used by the redis
2779 lookup. Patch from Warren Baker, of The Packet Hub.
2781 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2783 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2784 hostname or reverse DNS when processing a host list. Used suggestions
2785 from multiple comments on this bug.
2787 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2789 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2790 Missed a few lines, added it to make the runtest require no keyboard
2793 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2794 contains upper case chars. Make router use caseful_local_part.
2796 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2797 support when GnuTLS has been built with p11-kit.
2803 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2805 This, or similar/improved, will also be change PP/11 of 4.82.
2811 PP/01 Handle short writes when writing local log-files.
2812 In practice, only affects FreeBSD (8 onwards).
2813 Bugzilla 1053, with thanks to Dmitry Isaikin.
2815 NM/01 Bugzilla 949 - Documentation tweak
2817 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2820 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2822 PP/02 Implemented gsasl authenticator.
2824 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2826 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2827 `pkg-config foo` for cflags/libs.
2829 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2830 with rest of GSASL and with heimdal_gssapi.
2832 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2833 `pkg-config foo` for cflags/libs for the TLS implementation.
2835 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2836 properties get this fed in as external SSF. A number of robustness
2837 and debugging improvements to the cyrus_sasl authenticator.
2839 PP/08 cyrus_sasl server now expands the server_realm option.
2841 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2842 Patch by Jeremy Harris.
2844 PP/10 Added dbmjz lookup type.
2846 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2848 PP/12 MAIL args handles TAB as well as SP, for better interop with
2849 non-compliant senders.
2850 Analysis and variant patch by Todd Lyons.
2852 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2853 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2854 Patch from Dirk Mueller <dmueller@suse.com>
2856 PP/13 tls_peerdn now print-escaped for spool files.
2857 Observed some $tls_peerdn in wild which contained \n, which resulted
2858 in spool file corruption.
2860 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2861 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2862 or write after TLS renegotiation, which otherwise led to messages
2865 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2866 as a tracking header (ie: a signed header comes before the signature).
2867 Patch from Wolfgang Breyha.
2869 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2870 comma-sep list; embedded commas doubled.
2872 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2874 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2876 Report and patch from Dmitry Banschikov.
2878 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2879 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2880 failures. We appear to now support TLS1.1+ with Exim.
2882 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2883 lets Exim select keys and certificates based upon TLS SNI from client.
2884 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2885 before an outbound SMTP session. New log_selector, +tls_sni.
2887 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2888 NULL dereference. Report and patch from Alun Jones.
2890 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2891 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2892 Not seeing resolver debug output on NetBSD, but suspect this is a
2893 resolver implementation change.
2895 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2896 Left warnings. Added "eximon gdb" invocation mode.
2898 PP/21 Defaulting "accept_8bitmime" to true, not false.
2900 PP/22 Added -bw for inetd wait mode support.
2902 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2903 locate the relevant includes and libraries. Made this the default.
2905 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2906 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2908 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2909 This may cause build issues on older platforms.
2911 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2912 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2913 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2914 Added SNI support via GnuTLS too.
2915 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2917 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2919 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2920 Applied second patch from Janne, implementing suggestion to default
2921 multiple-strings-in-record handling to match SPF spec.
2923 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2925 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2926 read-only, out of scope).
2927 Patch from Wolfgang Breyha, report from Stuart Northfield.
2929 PP/29 Fix three issues highlighted by clang analyser static analysis.
2930 Only crash-plausible issue would require the Cambridge-specific
2931 iplookup router and a misconfiguration.
2932 Report from Marcin Mirosław.
2934 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2936 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2937 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2938 As part of this, removing so much warning spew let me fix some minor
2939 real issues in debug logging.
2941 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2942 assignment on my part. Fixed.
2944 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2945 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2946 Janne Snabb (who went above and beyond: thank you).
2948 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2949 string otherwise requires a connection and a bunch more work and it's
2950 relatively easy to get wrong. Should also expose TLS library linkage
2953 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2954 64-bit ${eval} (JH/03).
2956 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2957 GNU libc to support some of the 64-bit stuff, should not lead to
2958 conflicts. Defined before os.h is pulled in, so if a given platform
2959 needs to override this, it can.
2961 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2962 protection layer was required, which is not implemented.
2963 Bugzilla 1254, patch from Wolfgang Breyha.
2965 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2966 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2967 tls_dhparam take prime identifiers. Also unbreak combination of
2968 OpenSSL+DH_params+TLSSNI.
2970 PP/39 Disable SSLv2 by default in OpenSSL support.
2976 PP/01 Solaris build fix for Oracle's LDAP libraries.
2977 Bugzilla 1109, patch from Stephen Usher.
2979 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2981 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2984 TF/02 Fix a couple more cases where we did not log the error message
2985 when unlink() failed. See also change 4.74-TF/03.
2987 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2988 lock up or crash if it happened to be inside a call to libc when it
2989 got a SIGUSR1 from exiwhat.
2991 The SIGUSR1 handler appends the current process status to the process
2992 log which is later printed by exiwhat. It used to use the general
2993 purpose logging code to do this, but several functions it calls are
2994 not safe for signals.
2996 The new output code in the SIGUSR1 handler is specific to the process
2997 log, and simple enough that it's easy to inspect for signal safety.
2998 Removing some special cases also simplifies the general logging code.
2999 Removing the spurious timestamps from the process log simplifies
3002 TF/04 Improved ratelimit ACL condition.
3004 The /noupdate option has been deprecated in favour of /readonly which
3005 has clearer semantics. The /leaky, /strict, and /readonly update modes
3006 are mutually exclusive. The update mode is no longer included in the
3007 database key; it just determines when the database is updated. (This
3008 means that when you upgrade Exim will forget old rate measurements.)
3010 Exim now checks that the per_* options are used with an update mode that
3011 makes sense for the current ACL. For example, when Exim is processing a
3012 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
3013 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
3014 must specify per_mail/readonly. If you omit the update mode it defaults to
3015 /leaky where that makes sense (as before) or /readonly where required.
3017 The /noupdate option is now undocumented but still supported for
3018 backwards compatibility. It is equivalent to /readonly except that in
3019 ACLs where /readonly is required you may specify /leaky/noupdate or
3020 /strict/noupdate which are treated the same as /readonly.
3022 A useful new feature is the /count= option. This is a generalization
3023 of the per_byte option, so that you can measure the throughput of other
3024 aggregate values. For example, the per_byte option is now equivalent
3025 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
3027 The per_rcpt option has been generalized using the /count= mechanism
3028 (though it's more complicated than the per_byte equivalence). When it is
3029 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
3030 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
3031 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
3032 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
3033 Note that using per_rcpt with a non-readonly update mode in more than
3034 one ACL will cause the recipients to be double-counted. (The per_mail
3035 and per_byte options don't have this problem.)
3037 The handling of very low rates has changed slightly. If the computed rate
3038 is less than the event's count (usually one) then this event is the first
3039 after a long gap. In this case the rate is set to the same as this event's
3040 count, so that the first message of a spam run is counted properly.
3042 The major new feature is a mechanism for counting the rate of unique
3043 events. The new per_addr option counts the number of different
3044 recipients that someone has sent messages to in the last time period. It
3045 behaves like per_rcpt if all the recipient addresses are different, but
3046 duplicate recipient addresses do not increase the measured rate. Like
3047 the /count= option this is a general mechanism, so the per_addr option
3048 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
3049 example, measure the rate that a client uses different sender addresses
3050 with the options per_mail/unique=$sender_address. There are further
3051 details in the main documentation.
3053 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3055 TF/06 Removed a few PCRE remnants.
3057 TF/07 Automatically extract Exim's version number from tags in the git
3058 repository when doing development or release builds.
3060 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3061 Bugzilla 879. Patch from Paul Fisher.
3063 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3064 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3067 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3069 PP/05 Variable $av_failed, true if the AV scanner deferred.
3070 Bugzilla 1078. Patch from John Horne.
3072 PP/06 Stop make process more reliably on build failure.
3073 Bugzilla 1087. Patch from Heiko Schlittermann.
3075 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3076 Bugzilla 1089. Patch from Heiko Schlittermann.
3078 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3079 Bugzilla 1131. Patch from Holger Weiß.
3081 PP/09 Handle IPv6 addresses with SPF.
3082 Bugzilla 860. Patch from Wolfgang Breyha.
3084 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3086 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3089 PP/11 match_* no longer expand right-hand-side by default.
3090 New compile-time build option, EXPAND_LISTMATCH_RHS.
3091 New expansion conditions, "inlist", "inlisti".
3093 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3095 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3097 PP/14 fix log_write() format string regression from TF/03.
3098 Bugzilla 1152. Patch from Dmitry Isaikin.
3104 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3106 PP/02 Harmonised TLS library version reporting; only show if debugging.
3107 Layout now matches that introduced for other libraries in 4.74 PP/03.
3109 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3111 PP/04 New "dns_use_edns0" global option.
3113 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3116 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3117 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3119 TK/01 Updated PolarSSL code to 0.14.2.
3120 Bugzilla 1097. Patch from Andreas Metzler.
3122 PP/07 Catch divide-by-zero in ${eval:...}.
3123 Fixes bugzilla 1102.
3125 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3128 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3129 format-string attack -- SECURITY: remote arbitrary code execution.
3131 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3132 time unintentionally subject to list matching rules, letting the header
3133 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3134 arbitrary string expansion). This allowed for information disclosure.
3136 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3137 INT_MIN/-1 -- value coerced to INT_MAX.
3143 NM/01 Workaround for PCRE version dependency in version reporting
3146 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3147 This fixes portability to compilers other than gcc, notably
3148 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3150 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3151 makefiles for portability to HP-UX and POSIX correctness.
3153 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3154 Also via indented variable definition in the Makefile.
3155 (Debugging by Oliver Heesakkers).
3157 PP/02 Restore caching of spamd results with expanded spamd_address.
3158 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3160 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3161 Improves build reliability. Fix from: Frank Elsner
3163 NM/02 Fix wide character breakage in the rfc2047 coding
3164 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3166 NM/03 Allow underscore in dnslist lookups
3167 Fixes bug 1026. Patch from Graeme Fowler
3169 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3170 Code patches from Adam Ciarcinski of NetBSD.
3172 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3175 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3176 is logged, to avoid truncation. Patch from John Horne.
3178 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3179 Patch from Jakob Hirsch.
3181 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3182 SQL string expansion failure details.
3183 Patch from Andrey Oktyabrski.
3185 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3186 Patch from Simon Arlott.
3188 PP/09 New lookups functionality failed to compile on old gcc which rejects
3189 extern declarations in function scope.
3190 Patch from Oliver Fleischmann
3192 PP/10 Use sig_atomic_t for flags set from signal handlers.
3193 Check getgroups() return and improve debugging.
3194 Fixed developed for diagnosis in bug 927 (which turned out to be
3197 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3198 Patch from Mark Zealey.
3200 PP/12 Bugzilla 1056: Improved spamd server selection.
3201 Patch from Mark Zealey.
3203 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3204 Based on patch from Heiko Schlittermann.
3206 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3207 Patch from Uwe Doering, sign-off by Michael Haardt.
3209 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3210 variable declaration deep within a block. Bug and patch from
3213 PP/15 lookups-Makefile IRIX compatibility coercion.
3215 PP/16 Make DISABLE_DKIM build knob functional.
3217 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3218 Patch by Simon Arlott
3220 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3221 variable argument macros. Our copy now differs from upstream.
3227 TF/01 Failure to get a lock on a hints database can have serious
3228 consequences so log it to the panic log.
3230 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3231 controlled using the smtp_confirmation log selector.
3233 TF/03 Include the error message when we fail to unlink a spool file.
3235 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3236 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3237 for maintaining out-of-tree patches for some time.
3239 PP/01 Bugzilla 139: Documentation and portability issues.
3240 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3241 Handle per-OS dynamic-module compilation flags.
3243 PP/02 Let /dev/null have normal permissions.
3244 The 4.73 fixes were a little too stringent and complained about the
3245 permissions on /dev/null. Exempt it from some checks.
3246 Reported by Andreas M. Kirchwitz.
3248 PP/03 Report version information for many libraries, including
3249 Exim version information for dynamically loaded libraries. Created
3250 version.h, now support a version extension string for distributors
3251 who patch heavily. Dynamic module ABI change.
3253 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3254 privilege escalation vulnerability whereby the Exim run-time user
3255 can cause root to append content of the attacker's choosing to
3258 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3261 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3262 If dropping privileges for untrusted macros, we disabled normal logging
3263 on the basis that it would fail; for the Exim run-time user, this is not
3264 the case, and it resulted in successful deliveries going unlogged.
3265 Fixed. Reported by Andreas Metzler.
3271 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3272 only prepend for the Resent-* case. Fixes regression introduced in
3273 Exim 4.70 by NM/22 for Bugzilla 607.
3275 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3276 increasing numbers of administrators be bitten by this.
3278 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3280 PP/03 Bugzilla 994: added openssl_options main configuration option.
3282 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3284 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3286 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3288 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3289 without a peer certificate, leading to a segfault because of an
3290 assumption that peers always have certificates. Be a little more
3291 paranoid. Problem reported by Martin Tscholak.
3293 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3294 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3295 NB: ClamAV planning to remove STREAM in "middle of 2010".
3296 CL also introduces -bmalware, various -d+acl logging additions and
3297 more caution in buffer sizes.
3299 PP/09 Implemented reverse_ip expansion operator.
3301 PP/10 Bugzilla 937: provide a "debug" ACL control.
3303 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3305 PP/12 Bugzilla 973: Implement --version.
3307 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3309 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3311 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3313 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3314 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3315 ignore trailing whitespace.
3317 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3319 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3322 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3323 Notification from Dr Andrew Aitchison.
3325 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3326 ExtendedDetectionInfo response format.
3327 Notification from John Horne.
3329 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3332 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3333 XSL and documented dependency on system catalogs, with examples of how
3336 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3339 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3340 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3341 configuration file which is writeable by the Exim user or group.
3343 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3344 of configuration files to cover files specified with the -C option if
3345 they are going to be used with root privileges, not just the default
3348 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3349 option (effectively making it always true).
3351 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3352 files to be used while preserving root privileges.
3354 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3355 that rogue child processes cannot use them.
3357 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3358 run-time user, instead of root.
3360 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3361 Exim run-time user without dropping privileges.
3363 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3364 result string, instead of calling string_vformat() twice with the same
3367 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3368 for other users. Others should always drop root privileges if they use
3369 -C on the command line, even for a whitelisted configure file.
3371 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3373 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3379 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3380 $data_path, and $header_path variables; fixed documentation bugs and
3383 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3384 exipick to access non-standard spools, including the "frozen" queue
3387 NM/01 Bugzilla 965: Support mysql stored procedures.
3388 Patch from Alain Williams
3390 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3392 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3393 Patch from Andreas Metzler
3395 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3396 Patch from Kirill Miazine
3398 NM/05 Bugzilla 671: Added umask to procmail example.
3400 JJ/03 installed exipick 20100323.0, fixing doc bug
3402 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3403 directory. Notification and patch from Dan Rosenberg.
3405 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3407 TK/02 Improve log output when DKIM signing operation fails.
3409 MH/01 Treat the transport option dkim_domain as a colon separated
3410 list, not as a single string, and sign the message with each element,
3411 omitting multiple occurences of the same signer.
3413 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3414 Bugzilla 985, 986. Patch by Simon Arlott
3416 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3417 Patch by Simon Arlott
3419 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3420 MBX locking. Notification from Dan Rosenberg.
3426 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3428 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3430 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3432 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3434 NM/04 Bugzilla 915: Flag broken perl installation during build.
3440 TK/01 Added patch by Johannes Berg that expands the main option
3441 "spamd_address" if it starts with a dollar sign.
3443 TK/02 Write list of recipients to X-Envelope-Sender header when building
3444 the mbox-format spool file for content scanning (suggested by Jakob
3447 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3448 (http://www.dcc-servers.net/) support via dccifd. Activated by
3449 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3451 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3452 by Mark Daniel Reidel <mr@df.eu>.
3454 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3455 When building exim an external PCRE library is now needed -
3456 PCRE is a system library on the majority of modern systems.
3457 See entry on PCRE_LIBS in EDITME file.
3459 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3460 conversation. Added nologin parameter to request.
3461 Patch contributed by Kirill Miazine.
3463 TF/01 Do not log submission mode rewrites if they do not change the address.
3465 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3467 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3468 log files in place. Contributed by Roberto Lima.
3470 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3472 TF/03 Bugzilla 615: When checking the local_parts router precondition
3473 after a local_part_suffix or local_part_prefix option, Exim now
3474 does not use the address's named list lookup cache, since this
3475 contains cached lookups for the whole local part.
3477 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3478 Robert Millan. Documentation is in experimental-spec.txt.
3480 TF/04 Bugzilla 668: Fix parallel build (make -j).
3482 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3484 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3485 Patch provided by Jan Srzednicki.
3487 TF/05 Leading white space used to be stripped from $spam_report which
3488 wrecked the formatting. Now it is preserved.
3490 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3491 that they are available at delivery time.
3493 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3495 TF/08 TLS error reporting now respects the incoming_interface and
3496 incoming_port log selectors.
3498 TF/09 Produce a more useful error message if an SMTP transport's hosts
3499 setting expands to an empty string.
3501 NM/06 Bugzilla 744: EXPN did not work under TLS.
3502 Patch provided by Phil Pennock.
3504 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3505 Patch provided by Richard Godbee.
3507 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3508 acl_smtp_notquit, added index entry.
3510 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3511 Patch provided by Eugene Bujak.
3513 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3514 accept(). Patch provided by Maxim Dounin.
3516 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3517 Patch provided by Phil Pennock.
3519 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3521 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3522 Patch provided by Brad "anomie" Jorsch.
3524 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3525 Patch provided by Dean Brooks.
3527 TK/05 Add native DKIM support (does not depend on external libraries).
3529 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3530 Patch provided by Graeme Fowler.
3532 NM/16 Bugzilla 851: Documentation example syntax fix.
3534 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3536 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3539 NM/19 Bugzilla 745: TLS version reporting.
3540 Patch provided by Phil Pennock.
3542 NM/20 Bugzilla 167: bool: condition support.
3543 Patch provided by Phil Pennock.
3545 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3546 clients. Patch provided by Phil Pennock.
3548 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3549 Patch provided by Brad "anomie" Jorsch.
3551 NM/23 Bugzilla 687: Fix misparses in eximstats.
3552 Patch provided by Heiko Schlittermann.
3554 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3555 Patch provided by Heiko Schlittermann.
3557 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3558 plus update to original patch.
3560 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3562 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3563 Patch provided by David Brownlee.
3565 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3567 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3569 NM/30 Bugzilla 888: TLS documentation bugfixes.
3571 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3573 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3574 Unlike the original bugzilla I have changed all shell scripts in src tree.
3576 NM/33 Bugzilla 898: Transport filter timeout fix.
3577 Patch by Todd Rinaldo.
3579 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3580 Patch by Serge Demonchaux.
3582 NM/35 Bugzilla 39: Base64 decode bug fixes.
3583 Patch by Jakob Hirsch.
3585 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3587 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3589 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3591 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3597 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3598 ALT-N's libdkim that I have put here:
3599 http://duncanthrax.net/exim-experimental/
3601 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3602 were called 'true' and it seems that C99 defines that as a reserved
3603 keyword to be used with 'bool' variable types. That means you could
3604 not include C99-style headers which use bools without triggering
3605 build errors in sieve.c.
3607 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3608 as mailq or other aliases. Changed the --help handling significantly
3609 to do whats expected. exim_usage() emits usage/help information.
3611 SC/01 Added the -bylocaldomain option to eximstats.
3613 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3615 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3617 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3623 PH/01 Another patch from the Sieve maintainer.
3625 PH/02 When an IPv6 address is converted to a string for single-key lookup
3626 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3627 dots are used instead of colons so that keys in lsearch files need not
3628 contain colons. This was done some time before quoting was made available
3629 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3630 (notated using the quote facility) so as to distinguish them from IPv4
3631 keys. This meant that lookups for IP addresses in host lists did not work
3632 for iplsearch lookups.
3634 This has been fixed by arranging for IPv6 addresses to be expressed with
3635 colons if the lookup type is iplsearch. This is not incompatible, because
3636 previously such lookups could never work.
3638 The situation is now rather anomalous, since one *can* have colons in
3639 ordinary lsearch keys. However, making the change in all cases is
3640 incompatible and would probably break a number of configurations.
3642 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3645 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3646 conversion specification without a maximum field width, thereby enabling
3647 a rogue spamd server to cause a buffer overflow. While nobody in their
3648 right mind would setup Exim to query an untrusted spamd server, an
3649 attacker that gains access to a server running spamd could potentially
3650 exploit this vulnerability to run arbitrary code as the Exim user.
3652 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3653 $primary_hostname instead of what libspf2 thinks the hosts name is.
3655 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3656 a directory entry by the name of the lookup key. Previously, if a
3657 symlink pointed to a non-existing file or a file in a directory that
3658 Exim lacked permissions to read, a lookup for a key matching that
3659 symlink would fail. Now it is enough that a matching directory entry
3660 exists, symlink or not. (Bugzilla 503.)
3662 PH/03 The body_linecount and body_zerocount variables are now exported in the
3665 PH/04 Added the $dnslist_matched variable.
3667 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3668 This means they are set thereafter only if the connection becomes
3671 PH/06 Added the client_condition to authenticators so that some can be skipped
3672 by clients under certain conditions.
3674 PH/07 The error message for a badly-placed control=no_multiline_responses left
3675 "_responses" off the end of the name.
3677 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3679 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3680 (without spaces) instead of just copying the configuration text.
3682 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3684 PH/11 Added $max_received_linelength.
3686 PH/12 Added +ignore_defer and +include_defer to host lists.
3688 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3689 way in which PCRE > 7.0 is built.
3691 PH/14 Implemented queue_only_load_latch.
3693 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3694 MAIL command. The effect was to mangle the value on 64-bit systems.
3696 PH/16 Another patch from the Sieve maintainer.
3698 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3700 PH/18 If a system quota error occurred while trying to create the file for
3701 a maildir delivery, the message "Mailbox is full" was not appended to the
3702 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3703 only to a quota excession during the actual writing of the file.
3705 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3706 characters?) which causes problems in log lines. The DN values are now
3707 passed through string_printing() before being added to log lines.
3709 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3710 and InterBase are left for another time.)
3712 PH/21 Added message_body_newlines option.
3714 PH/22 Guard against possible overflow in moan_check_errorcopy().
3716 PH/23 POSIX allows open() to be a macro; guard against that.
3718 PH/24 If the recipient of an error message contained an @ in the local part
3719 (suitably quoted, of course), incorrect values were put in $domain and
3720 $local_part during the evaluation of errors_copy.
3726 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3727 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3730 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3731 issue a MAIL command.
3733 PH/02 In an ACL statement such as
3735 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3737 if a client was not listed at all, or was listed with a value other than
3738 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3739 the condition was not true (as it should be), so access was not denied.
3740 The bug was that the ! inversion was incorrectly passed on to the second
3741 item. This has been fixed.
3743 PH/03 Added additional dnslists conditions == and =& which are different from
3744 = and & when the dns lookup returns more than one IP address.
3746 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3747 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3749 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3750 FSYNC, which compiles an option called disable_fsync that allows for
3751 bypassing fsync(). The documentation is heavily laced with warnings.
3753 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3755 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3756 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3757 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3758 including adding "make clean"; (3) Added -fPIC when compiling the test
3759 dynamically loaded module, to get rid of a warning.
3761 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3762 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3763 = 0s. The bug is otherwise harmless.
3765 PH/07 There was a bug in the dovecot authenticator such that the value of
3766 $auth1 could be overwritten, and so not correctly preserved, after a
3767 successful authentication. This usually meant that the value preserved by
3768 the server_setid option was incorrect.
3770 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3772 PH/09 Installed PCRE release 7.0.
3774 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3775 run for batched SMTP input. It is now run at the start of every message
3776 in the batch. While fixing this I discovered that the process information
3777 (output by running exiwhat) was not always getting set for -bs and -bS
3778 input. This is fixed, and it now also says "batched" for BSMTP.
3780 PH/11 Added control=no_pipelining.
3782 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3783 patch, slightly modified), and move the expansion of helo_data till after
3784 the connection is made in the smtp transport (so it can use these
3787 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3789 PH/14 Added log_selector = +pid.
3791 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3793 PH/16 Add ${if forany and ${if forall.
3795 PH/17 Added dsn_from option to vary the From: line in DSNs.
3797 PH/18 Flush SMTP output before performing a callout, unless control =
3798 no_callout_flush is set.
3800 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3801 was true (the default) a successful delivery failed to delete the retry
3802 item, thus causing premature timeout of the address. The bug is now
3805 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3807 PH/21 Long custom messages for fakedefer and fakereject are now split up
3808 into multiline responses in the same way that messages for "deny" and
3809 other ACL rejections are.
3811 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3812 with slight modification.
3814 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3815 draft, changing the syntax and factoring some duplicate code".
3817 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3818 for deliveries of the second and subsequent messages over the same SMTP
3821 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3822 ${reduce, with only minor "tidies".
3824 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3826 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3827 expansion side effects.
3829 PH/27 When a message times out after an over-quota error from an Exim-imposed
3830 quota, the bounce message says "mailbox is full". This message was not
3831 being given when it was a system quota that was exceeded. It now should
3834 MH/03 Made $recipients available in local_scan(). local_scan() already has
3835 better access to the recipient list through recipients_list[], but
3836 $recipients can be useful in postmaster-provided expansion strings.
3838 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3839 in the case of a MAIL command with additional options following the
3840 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3841 were accidentally chopped off.
3843 PH/29 SMTP synchronization checks are implemented when a command is read -
3844 there is a check that no more input is waiting when there shouldn't be
3845 any. However, for some commands, a delay in an ACL can mean that it is
3846 some time before the response is written. In this time, more input might
3847 arrive, invalidly. So now there are extra checks after an ACL has run for
3848 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3849 pipelining has not been advertised.
3851 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3853 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3854 returned in the SMTP response when smtp_return_error_details was false.
3855 This has been fixed.
3857 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3858 instead of the C I/O that was originally supplied, because problems were
3859 reported on Solaris.
3861 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3862 Exim which did not show up earlier: it was assuming that a call to
3863 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3864 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3865 was a macro that became an assignment, so it seemed to work. This has
3866 changed to a proper function call with a void return, hence the compile
3867 error. Exim's code has been fixed.
3869 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3872 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3874 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3876 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3877 because it turns out to be too big or there is a timeout) there is no
3878 "Completed" line in the log. When some messages of this type were
3879 selected by exigrep, they were listed as "not completed". Others were
3880 picked up by some special patterns. I have improved the selection
3881 criteria to be more general.
3883 PH/38 The host_find_failed option in the manualroute router can now be set
3884 to "ignore", to completely ignore a host whose IP address cannot be
3885 found. If all hosts are ignored, the behaviour is controlled by the new
3886 host_all_ignored option.
3888 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3889 homing or because of multiple MX records with /mx) generated more than
3890 one IP address, and the following item turned out to be the local host,
3891 all the secondary addresses of the first item were incorrectly removed
3892 from the list, along with the local host and any following hosts (which
3893 is what is supposed to happen).
3895 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3896 whoever called Exim into the -H file. In the case of the daemon it was
3897 behaving confusingly. When first started, it used values for whoever
3898 started the daemon, but after a SIGHUP it used the Exim user (because it
3899 calls itself on a restart). I have changed the code so that it now always
3902 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3903 message are rejected with the same error (e.g. no authentication or bad
3904 sender address), and a DATA command is nevertheless sent (as can happen
3905 with PIPELINING or a stupid MUA), the error message that was given to the
3906 RCPT commands is included in the rejection of the DATA command. This is
3907 intended to be helpful for MUAs that show only the final error to their
3910 PH/42 Another patch from the Sieve maintainer.
3912 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3913 Eximstats - Fixed some broken HTML links and added missing column headers
3915 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3916 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3918 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3920 PH/43 Yet another patch from the Sieve maintainer.
3922 PH/44 I found a way to check for a TCP/IP connection going away before sending
3923 the response to the final '.' that terminates a message, but only in the
3924 case where the client has not sent further data following the '.'
3925 (unfortunately, this is allowed). However, in many cases there won't be
3926 any further data because there won't be any more messages to send. A call
3927 to select() can be used: if it shows that the input is "ready", there is
3928 either input waiting, or the socket has been closed. An attempt to read
3929 the next input character can distinguish the two cases. Previously, Exim
3930 would have sent an OK response which the client would never have see.
3931 This could lead to message repetition. This fix should cure that, at
3932 least in a lot of common cases.
3934 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3935 advertised in response to EHLO.
3941 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3942 fixed by 4.65/MH/01 (is this a record?) are fixed:
3944 (i) An empty string was always treated as zero by the numeric comparison
3945 operators. This behaviour has been restored.
3947 (ii) It is documented that the numeric comparison operators always treat
3948 their arguments as decimal numbers. This was broken in that numbers
3949 starting with 0 were being interpreted as octal.
3951 While fixing these problems I realized that there was another issue that
3952 hadn't been noticed. Values of message_size_limit (both the global option
3953 and the transport option) were treated as octal if they started with 0.
3954 The documentation was vague. These values are now always treated as
3955 decimal, and I will make that clear in the documentation.
3961 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3962 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3965 MH/01 Don't check that the operands of numeric comparison operators are
3966 integers when their expansion is in "skipping" mode (fixes bug
3967 introduced by 4.64-PH/07).
3969 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3970 child addresses, Exim now panics and dies. Previously, because the count
3971 is held in a short int, deliveries were likely to be lost. As such a
3972 large number of recipients for a single message is ridiculous
3973 (performance will be very, very poor), I have chosen to impose a limit
3974 rather than extend the field.
3980 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3981 leftover -K file (the existence of which was triggered by #402).
3982 While we were at it, introduced process PID as part of the -K
3983 filename. This should rule out race conditions when creating
3986 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3987 processing considerably. Previous code took too long for large mails,
3988 triggering a timeout which in turn triggers #401.
3990 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3991 in the DK code in transports.c. sendfile() is not really portable,
3992 hence the _LINUX specificness.
3994 TF/01 In the add_headers option to the mail command in an Exim filter,
3995 there was a bug that Exim would claim a syntax error in any
3996 header after the first one which had an odd number of characters
3999 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
4000 callout verification, Exim cached a "reject" for the entire domain. This
4001 is correct for most verifications, but it is not correct for a recipient
4002 verification with use_sender or use_postmaster set, because in that case
4003 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
4004 case of MAIL FROM:<> rejection from other early rejections (e.g.
4005 rejection of HELO). When verifying a recipient using a non-null MAIL
4006 address, the cache is ignored if it shows MAIL FROM:<> rejection.
4007 Whatever the result of the callout, the value of the domain cache is
4008 left unchanged (for any other kind of callout, getting as far as trying
4009 RCPT means that the domain itself is ok).
4011 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
4014 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
4015 manifest itself as EPIPE rather than ECONNECT. When tidying away a
4016 session, the daemon ignores ECONNECT errors and logs others; it now
4017 ignores EPIPE as well.
4019 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
4020 (quoted-printable decoding).
4022 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
4023 later the small subsequent patch to fix an introduced bug.
4025 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
4027 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
4029 PH/08 An error is now given if message_size_limit is specified negative.
4031 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
4032 to be given (somewhat) arbitrary names.
4034 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
4037 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
4038 miscellaneous code fixes
4040 PH/10 Added the log_reject_target ACL modifier to specify where to log
4043 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
4044 hostname. This is wrong, because it relates to the incoming message (and
4045 probably the interface on which it is arriving) and not to the outgoing
4046 callout (which could be using a different interface). This has been
4047 changed to use the value of the helo_data option from the smtp transport
4048 instead - this is what is used when a message is actually being sent. If
4049 there is no remote transport (possible with a router that sets up host
4050 addresses), $smtp_active_hostname is used.
4052 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
4053 tweaks were necessary in order to get it to work (see also 21 below):
4054 (a) The code assumed that strncpy() returns a negative number on buffer
4055 overflow, which isn't the case. Replaced with Exim's string_format()
4057 (b) There were several signed/unsigned issues. I just did the minimum
4058 hacking in of casts. There is scope for a larger refactoring.
4059 (c) The code used strcasecmp() which is not a standard C function.
4060 Replaced with Exim's strcmpic() function.
4061 (d) The code set only $1; it now sets $auth1 as well.
4062 (e) A simple test gave the error "authentication client didn't specify
4063 service in request". It would seem that Dovecot has changed its
4064 interface. Fortunately there's a specification; I followed it and
4065 changed what the client sends and it appears to be working now.
4067 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4070 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4071 address A is aliased to B and C, where B exists and C does not. Without
4072 -v the output is "A verified" because verification stops after a
4073 successful redirection if more than one address is generated. However,
4074 with -v the child addresses are also verified. Exim was outputting "A
4075 failed to verify" and then showing the successful verification for C,
4076 with its parentage. It now outputs "B failed to verify", showing B's
4077 parentage before showing the successful verification of C.
4079 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4080 look up a TXT record in a specific list after matching in a combined
4083 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4084 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4085 they consult the DNS. I had assumed they would set it the way they
4086 wanted; and indeed my experiments on Linux seem to show that in some
4087 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4088 To be on the safe side, however, I have now made the interface to
4089 host_find_byname() similar to host_find_bydns(), with an argument
4090 containing the DNS resolver options. The host_find_byname() function now
4091 sets these options at its start, just as host_find_bydns() does. The smtp
4092 transport options dns_qualify_single and dns_search_parents are passed to
4093 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4094 of host_find_byname() use the default settings of RES_DEFNAMES
4095 (qualify_single) but not RES_DNSRCH (search_parents).
4097 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4098 spool_read_header() do less string testing, by means of a preliminary
4099 switch on the second character of optional "-foo" lines. (This is
4100 overdue, caused by the large number of possibilities that now exist.
4101 Originally there were few.) While I was there, I also converted the
4102 str(n)cmp tests so they don't re-test the leading "-" and the first
4103 character, in the hope this might squeeze out yet more improvement.
4105 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4106 flag allowing group syntax was set by the header_syntax check but not
4107 turned off, possible causing trouble later; (2) The flag was not being
4108 set at all for the header_verify test, causing "group"-style headers to
4109 be rejected. I have now set it in this case, and also caused header_
4110 verify to ignore an empty address taken from a group. While doing this, I
4111 came across some other cases where the code for allowing group syntax
4112 while scanning a header line wasn't quite right (mostly, not resetting
4113 the flag correctly in the right place). These bugs could have caused
4114 trouble for malformed header lines. I hope it is now all correct.
4116 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4117 with the "reply" argument non-NULL. The code, however (which originally
4118 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4119 but it didn't always do it. This confused somebody who was copying the
4120 code for some other use. I have removed all the tests.
4122 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4123 feature that was used to support insecure browsers during the U.S. crypto
4124 embargo. It requires special client support, and Exim is probably the
4125 only MTA that supported it -- and would never use it because real RSA is
4126 always available. This code has been removed, because it had the bad
4127 effect of slowing Exim down by computing (never used) parameters for the
4128 RSA_EXPORT functionality.
4130 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4131 authenticator to fail if there's a tab character in the incoming data
4132 (there should never be unless someone is messing about, as it's supposed
4133 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4134 if the connection is using TLS or if the remote IP is the same as the
4135 local IP, and the "valid-client-cert option" if a client certificate has
4138 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4139 authenticators. This can be used for authorization after authentication
4140 succeeds. (In the case of plaintext, it servers for both authentication
4143 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4144 if any retry times were supplied.
4146 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4147 connection, where there is no client IP address to check. In this
4148 situation, the verify now always succeeds.
4150 PH/25 Applied John Jetmore's -Mset patch.
4152 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4154 PH/27 In a string expansion for a processed (not raw) header when multiple
4155 headers of the same name were present, leading whitespace was being
4156 removed from all of them, but trailing whitespace was being removed only
4157 from the last one. Now trailing whitespace is removed from each header
4158 before concatenation. Completely empty headers in a concatenation (as
4159 before) are ignored.
4161 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4162 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4164 PH/29 [Removed. This was a change that I later backed out, and forgot to
4165 correct the ChangeLog entry (that I had efficiently created) before
4166 committing the later change.]
4168 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4169 address errors (4xx response to RCPT) over the same connection as other
4170 messages routed to the same hosts. Such deliveries are always "forced",
4171 so retry times are not inspected. This resulted in far too many retries
4172 for the affected addresses. The effect occurred only when there were more
4173 hosts than the hosts_max_try setting in the smtp transport when it had
4174 the 4xx errors. Those hosts that it had tried were not added to the list
4175 of hosts for which the message was waiting, so if all were tried, there
4176 was no problem. Two fixes have been applied:
4178 (i) If there are any address or message errors in an SMTP delivery, none
4179 of the hosts (tried or untried) are now added to the list of hosts
4180 for which the message is waiting, so the message should not be a
4181 candidate for sending over the same connection that was used for a
4182 successful delivery of some other message. This seems entirely
4183 reasonable: after all the message is NOT "waiting for some host".
4184 This is so "obvious" that I'm not sure why it wasn't done
4185 previously. Hope I haven't missed anything, but it can't do any
4186 harm, as the worst effect is to miss an optimization.
4188 (ii) If, despite (i), such a delivery is accidentally attempted, the
4189 routing retry time is respected, so at least it doesn't keep
4190 hammering the server.
4192 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4193 in ${readsocket because some servers need this prod.
4195 PH/32 Added some extra debug output when updating a wait-xxx database.
4197 PH/33 The hint "could be header name not terminated by colon", which has been
4198 given for certain expansion errors for a long time, was not being given
4199 for the ${if def:h_colon_omitted{... case.
4201 PH/34 The spec says: "With one important exception, whenever a domain list is
4202 being scanned, $domain contains the subject domain." There was at least
4203 one case where this was not true.
4205 PH/35 The error "getsockname() failed: connection reset by peer" was being
4206 written to the panic log as well as the main log, but it isn't really
4207 panic-worthy as it just means the connection died rather early on. I have
4208 removed the panic log writing for the ECONNRESET error when getsockname()
4211 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4212 runs only) independently of the message's sender address. This meant
4213 that, if the 4xx error was in fact related to the sender, a different
4214 message to the same recipient with a different sender could confuse
4215 things. In particular, this can happen when sending to a greylisting
4216 server, but other circumstances could also provoke similar problems.
4217 I have changed the default so that the retry time for these errors is now
4218 based a combination of the sender and recipient addresses. This change
4219 can be overridden by setting address_retry_include_sender=false in the
4222 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4223 remote server are returned as part of bounce messages. This was not
4224 happening for LMTP over a pipe (the lmtp transport), but now it is the
4225 same for both kinds of LMTP.
4227 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4228 in header lines that were in fact CNAMEs. This is no longer the case.
4230 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4231 and queue runs started by the daemon processed all messages. This has
4232 been fixed so that -R and -S can now usefully be given with -q<time>.
4234 PH/40 Import PCRE release 6.7 (fixes some bugs).
4236 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4238 PH/42 Give an error if -q is specified more than once.
4240 PH/43 Renamed the variables $interface_address and $interface_port as
4241 $received_ip_address and $received_port, to make it clear that these
4242 values apply to message reception, and not to the outgoing interface when
4243 a message is delivered. (The old names remain recognized, of course.)
4245 PH/44 There was no timeout on the connect() call when using a Unix domain
4246 socket in the ${readsocket expansion. There now is.
4248 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4249 be meaningful with "accept".
4251 SC/01 Eximstats V1.43
4252 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4254 SC/02 Eximstats V1.44
4255 Use a glob alias rather than an array ref in the generated
4256 parser. This improves both readability and performance.
4258 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4259 Collect SpamAssassin and rejection statistics.
4260 Don't display local sender or destination tables unless
4261 there is data to show.
4262 Added average volumes into the top table text output.
4264 SC/04 Eximstats V1.46
4265 Collect data on the number of addresses (recipients)
4266 as well as the number of messages.
4268 SC/05 Eximstats V1.47
4269 Added 'Message too big' to the list of mail rejection
4270 reasons (thanks to Marco Gaiarin).
4272 SC/06 Eximstats V1.48
4273 Mainlog lines which have GMT offsets and are too short to
4274 have a flag are now skipped.
4276 SC/07 Eximstats V1.49 (Alain Williams)
4277 Added the -emptyok flag.
4279 SC/08 Eximstats V1.50
4280 Fixes for obtaining the IP address from reject messages.
4282 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4283 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4284 whitespace changes from 4.64-PH/27
4286 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4289 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4290 are found, allow negative numbers in numeric criteria)
4292 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4294 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4295 to match changes made in 4.64-PH/43
4297 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4299 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4300 "domain" is actually an IP address, and force a failure. This locks out
4301 those revolvers/nameservers that support "A-for-A" lookups, in
4302 contravention of the specifications.
4304 PH/48 When a host name was looked up from an IP address, and the subsequent
4305 forward lookup of the name timed out, the host name was left in
4306 $sender_host_name, contrary to the specification.
4308 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4309 restricted to single-key lookups, Exim was not diagnosing an error if
4310 * or *@ was used with a query-style lookup.
4312 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4314 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4315 long ago, but noone interested enough thought of it. Let's just say that
4316 the "1.1" means that there are some new functions that weren't there at
4317 some point in the past.
4319 PH/51 Error processing for expansion failure of helo_data from an smtp
4320 transport during callout processing was broken.
4322 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4323 tested/used via the -bh/-bhc/-bs options.
4325 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4326 bug, fixed in subsequent PCRE releases).
4328 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4329 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4331 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4337 SC/01 Use a glob alias rather than an array ref in eximstats generated
4338 parser. This improves both readability and performance.
4340 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4341 Don't display local sender or destination tables in eximstats unless
4342 there is data to show.
4343 Added average volumes into the eximstats top table text output.
4345 SC/03 Collect data on the number of addresses (recipients) as well
4346 as the number of messages in eximstats.
4348 TF/01 Correct an error in the documentation for the redirect router. Exim
4349 does (usually) call initgroups() when daemonizing.
4351 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4352 with consistent privilege compared to when running as a daemon.
4354 TF/03 Note in the spec that $authenticated_id is not set for local
4355 submissions from trusted users.
4357 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4358 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4360 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4361 by adding some example configuration directives to the default
4362 configuration file. A little bit of work is required to uncomment the
4363 directives and define how usernames and passwords are checked, but
4364 there is now a framework to start from.
4366 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4367 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4368 without this. I don't know how relevant this is to other LDAP libraries.
4370 PH/02 Add the verb name to the "unknown ACL verb" error.
4372 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4374 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4376 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4377 directory not expanded when it should be if an expanded home directory
4378 was set for the address (which is overridden by the transport).
4380 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4383 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4384 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4385 because it is too late at that time, and has no effect.
4387 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4388 security issue with \' (bugzilla #107). I could not use the
4389 PQescapeStringConn() function, because it needs a PGconn value as one of
4392 PH/08 When testing addresses using -bt, indicate those final addresses that
4393 are duplicates that would not cause an additional delivery. At least one
4394 person was confused, thinking that -bt output corresponded to deliveries.
4395 (Suppressing duplicates isn't a good idea as you lose the information
4396 about possibly different redirections that led to the duplicates.)
4398 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4399 systems where poll() doesn't work, in particular OS X.
4401 PH/10 Added more information to debugging output for retry time not reached.
4403 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4404 operations in malware.c.
4406 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4409 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4410 syslog_duplication set false, log lines that would normally be written
4411 both the the main log and to the reject log were not written to syslog at
4414 PH/14 In the default configuration, change the use of "message" in ACL warn
4415 statements to "add_header".
4417 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4418 not followed by a command (e.g. "seen endif").
4420 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4421 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4424 PH/17 Added extra conditions to the default value of delay_warning_condition
4428 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4429 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4430 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4433 The Auto-Submitted: and various List- headers are standardised, whereas I
4434 don't think Precedence: ever was.
4436 PH/18 Refactored debugging code in route_finduser() to show more information,
4437 in particular, the error code if getpwnam() issues one.
4439 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4440 This is apparently needed in addition to the PH/07 change above to avoid
4441 any possible encoding problems.
4443 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4444 but not after initializing Perl.
4446 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4447 output them only if debugging. By default they are written stderr,
4448 apparently, which is not desirable.
4450 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4453 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4456 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4458 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4459 authenticated or an ident call has been made. Suppress the default
4460 values for $authenticated_id and $authenticated_sender (but permit -oMai
4461 and -oMas) when testing with -bh.
4463 PH/24 Re-jigged the order of the tests in the default configuration so that the
4464 tests for valid domains and recipients precede the DNS black list and CSA
4465 tests, on the grounds that those ones are more expensive.
4467 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4468 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4469 This bug exists in every version of Exim that I still have, right back to
4472 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4473 However, an attempt to turn on case-sensitivity in a regex key by
4474 including (?-i) didn't work because the subject string was already
4475 lowercased, and the effects were non-intuitive. It turns out that a
4476 one-line patch can be used to allow (?-i) to work as expected.
4482 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4483 other effects) broke the use of negated acl sub-conditions.
4485 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4488 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4489 "Deny" causes Exim to reject the incoming connection with a 554 error.
4490 Unfortunately, if there is a major crisis, such as a disk failure,
4491 tcp-wrappers gives "deny", whereas what one would like would be some
4492 kind of temporary error. A kludge has been added to help with this.
4493 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4494 554 error is used if errno is still zero or contains ENOENT (which occurs
4495 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4498 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4500 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4501 errors. Otherwise a message that provokes a temporary error (when other
4502 messages do not) can cause a whole host to time out.
4504 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4505 addresses were routed directly to files or pipes from a redirect router.
4506 File deliveries just didn't batch; pipe deliveries might have suffered
4509 PH/06 A failure to get a lock for a hints database would erroneously always say
4510 "Failed to get write lock", even when it was really a read lock.
4512 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4513 of 0600. This has been changed to use the value of the lockfile_mode
4514 option (which defaults to 0600).
4516 PH/08 Applied small patch from the Sieve maintainer.
4518 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4519 folder from quota calculations, a direct delivery into this folder messed
4520 up the contents of the maildirsize file. This was because the regex was
4521 used only to exclude .Trash (or whatever) when the size of the mailbox
4522 was calculated. There was no check that a delivery was happening into an
4523 excluded directory. This bug has been fixed by ignoring all quota
4524 processing for deliveries into excluded directories.
4526 PH/10 Added the maildirfolder_create_regex option to appendfile.
4532 PH/01 The code for finding all the local interface addresses on a FreeBSD
4533 system running IPv6 was broken. This may well have applied to all BSD
4534 systems, as well as to others that have similar system calls. The broken
4535 code found IPv4 interfaces correctly, but gave incorrect values for the
4536 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4537 that it would not match correctly against @[] and not recognize the IPv6
4540 PH/02 The ipliteral router was not recognizing addresses of the form user@
4541 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4543 PH/03 Added disable_ipv6.
4545 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4546 decoded form, because it is most often used to construct To: headers
4547 lines in autoreplies, and the decoded form may well be syntactically
4548 invalid. However, $reply_address has leading white space removed, and all
4549 newlines turned into spaces so that the autoreply transport does not
4552 PH/05 If group was specified without a user on a router, and no group or user
4553 was specified on a transport, the group from the router was ignored.
4555 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4556 for visible compile-time settings that can be used to change these
4557 numbers, for those that want even more. Backwards compatibility with old
4558 spool files has been maintained. However, going back to a previous Exim
4559 release will lost any variables that are in spool files.
4561 PH/07 Two small changes when running in the test harness: increase delay when
4562 passing a TCP/IP connection to a new process, in case the original
4563 process has to generate a bounce, and remove special handling of
4564 127.0.0.2 (sic), which is no longer necessary.
4566 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4567 be the same on different OS.
4569 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4572 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4573 whether --show-vars was specified or not
4575 JJ/02 exipick: Added support for new ACL variable spool format introduced
4578 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4579 syntactically invalid From: or Reply-to: line, and a filter used this to
4580 generate an autoreply, and therefore failed to obtain an address for the
4581 autoreply, Exim could try to deliver to a non-existent relative file
4582 name, causing unrelated and misleading errors. What now happens is that
4583 it logs this as a hard delivery error, but does not attempt to create a
4586 PH/11 The exinext utility has a -C option for testing purposes, but although
4587 the given file was scanned by exinext itself; it wasn't being passed on
4588 when Exim was called.
4590 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4591 an end-of-file indication when reading a command response.
4593 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4594 compiled. In many other places in Exim, IPv6 addresses are always
4595 recognized, so I have changed this. It also means that IPv4 domain
4596 literals of the form [IPV4:n.n.n.n] are now always recognized.
4598 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4599 used if the router is not running as root, for example, when verifying at
4600 ACL time, or when using -bh. The debugging output from this situation was
4601 non-existent - all you got was a failure to exec. I have made two
4604 (a) Failures to set uid/gid, the current directory, or a process leader
4605 in a subprocess such as that created by queryprogram now generate
4606 suitable debugging output when -d is set.
4608 (b) The queryprogram router detects when it is not running as root,
4609 outputs suitable debugging information if -d is set, and then runs
4610 the subprocess without attempting to change uid/gid.
4612 PH/15 Minor change to Makefile for building test_host (undocumented testing
4615 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4616 additional section of a DNS packet that returns MX or SRV records.
4617 Instead, it always explicitly searches for A/AAAA records. This avoids
4618 major problems that occur when a DNS server includes only records of one
4619 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4620 fixed another bug: if SRV records were looked up and the corresponding
4621 address records were *not* found in the additional section, the port
4622 values from the SRV records were lost.
4624 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4625 using the correct key (the original address) when searching the retry
4626 rules in order to find which one to use for generating the retry hint.
4628 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4629 adding the default one. Similarly, if it contains a Reply-To: header, the
4630 errors_reply_to option, if set, is not used.
4632 PH/19 When calculating a retry time, Exim used to measure the "time since
4633 failure" by looking at the "first failed" field in the retry record. Now
4634 it does not use this if it is later than than the arrival time of the
4635 message. Instead it uses the arrival time. This makes for better
4636 behaviour in cases where some deliveries succeed, thus re-setting the
4637 "first failed" field. An example is a quota failure for a huge message
4638 when small messages continue to be delivered. Without this change, the
4639 "time since failure" will always be short, possible causing more frequent
4640 delivery attempts for the huge message than are intended.
4641 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4643 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4644 $1, $2, $3) because the numerical variables can be reset during some
4645 expansion items (e.g. "match"), thereby losing the authentication data.
4647 PH/21 Make -bV show the size of off_t variables so that the test suite can
4648 decide whether to run tests for quotas > 2G.
4650 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4651 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4652 filecount value is greater than 2G or if a quota value is greater than 2G
4653 on a system where the size of off_t is not greater than 4, a panic error
4656 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4657 never match. The debug and -bh output now contains an explicit error
4658 message indicating a malformed IPv4 address or mask.
4660 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4661 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4662 PH/23 above applies.
4664 PH/25 Do not write to syslog when running in the test harness. The only
4665 occasion when this arises is a failure to open the main or panic logs
4666 (for which there is an explicit test).
4668 PH/26 Added the /no_tell option to "control=freeze".
4670 PH/27 If a host name lookup failed very early in a connection, for example, if
4671 the IP address matched host_lookup and the reverse lookup yielded a name
4672 that did not have a forward lookup, an error message of the form "no IP
4673 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4674 could be logged. Now it outputs the IP address instead of "NULL".
4676 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4677 allows the sender and the authenticated sender to be set when
4678 submitting a message from within Exim. Since child_open_exim() is
4679 documented for local_scan(), the new function should be too.
4681 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4682 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4683 results in an empty string is now treated as unset.
4685 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4687 PH/31 Added sender_verify_fail logging option.
4689 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4690 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4691 tidied the source and removed it altogether.
4693 PH/33 When a queue run was abandoned because the load average was too high, a
4694 log line was always written; now it is written only if the queue_run log
4695 selector is set. In addition, the log line for abandonment now contains
4696 information about the queue run such as the pid. This is always present
4697 in "start" and "stop" lines but was omitted from the "abandon" line.
4699 PH/34 Omit spaces between a header name and the colon in the error message that
4700 is given when verify = headers_syntax fails (if there are lots of them,
4701 the message gets confusing).
4703 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4704 names, as there are now some PTR records that contain slashes. This check
4705 is only to protect against broken name servers that fall over on strange
4706 characters, so the fact that it applies to all lookups doesn't matter.
4708 PH/36 Now that the new test suite is complete, we can remove some of the
4709 special code in Exim that was needed for the old test suite. For example,
4710 sorting DNS records because real resolvers return them in an arbitrary
4711 order. The new test suite's fake resolver always returns records in the
4714 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4715 bounces) except when queue_only is set, to avoid logging races between
4716 the different processes.
4718 PH/38 Panic-die if .include specifies a non-absolute path.
4720 PH/39 A tweak to the "H" retry rule from its user.
4722 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4723 a label. They prevented compilation on older perls.
4725 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4726 a warning to be raised on newish perls.
4728 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4729 on queue. Changes to match documented behaviour of showing count of
4730 messages matching specified criteria.
4732 PH/40 Changed the default ident timeout from 30s to 5s.
4734 PH/41 Added support for the use of login_cap features, on those BSD systems
4735 that have them, for controlling the resources used by pipe deliveries.
4737 PH/42 The content-scanning code uses fopen() to create files in which to put
4738 message data. Previously it was not paying any attention to the mode of
4739 the files. Exim runs with umask(0) because the rest of the code creates
4740 files with open(), and sets the required mode explicitly. Thus, these
4741 files were ending up world-writeable. This was not a big issue, because,
4742 being within the spool directory, they were not world-accessible. I have
4743 created a function called modefopen, which takes an additional mode
4744 argument. It sets umask(777), creates the file, chmods it to the required
4745 mode, then resets the umask. All the relevant calls to fopen() in the
4746 content scanning code have been changed to use this function.
4748 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4749 to 24 hours. This avoids potential overflow problems when processing G
4750 and H retry rules. I suspect nobody ever tinkers with this value.
4752 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4754 PH/45 When the plaintext authenticator is running as a client, the server's
4755 challenges are checked to ensure they are valid base64 strings. By
4756 default, the authentication attempt is cancelled if an invalid string is
4757 received. Setting client_ignore_invalid_base64 true ignores these errors.
4758 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4759 they are received. Thus, the responses can be made to depend on the
4760 challenges. If an invalid string is ignored, an empty string is placed in
4763 PH/46 Messages that are created by the autoreply transport now contains a
4764 References: header, in accordance with RFCs 2822 and 3834.
4766 PH/47 Added authenticated_sender_force to the smtp transport.
4768 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4770 PH/49 Installed latest patch from the Sieve maintainer.
4772 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4773 was also set, the appendfile transport was unnecessarily scanning a
4774 directory of message files (e.g. for maildir delivery) to find the count
4775 of files (along with the size), even though it did not need this
4776 information. It now does the scan only if it needs to find either the
4777 size of the count of files.
4779 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4781 PH/52 Two bugs concerned with error handling when the smtp transport is
4784 (i) Exim was not creating retry information for temporary errors given
4785 for individual recipients after the DATA command when the smtp transport
4786 was used in LMTP mode. This meant that they could be retried too
4787 frequently, and not timed out correctly.
4789 (ii) Exim was setting the flag that allows error details to be returned
4790 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4791 recipients that were returned after the DATA command.
4793 PH/53 This is related to PH/52, but is more general: for any failing address,
4794 when detailed error information was permitted to be returned to the
4795 sender, but the error was temporary, then after the final timeout, only
4796 "retry timeout exceeded" was returned. Now it returns the full error as
4797 well as "retry timeout exceeded".
4799 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4800 do this, and (what is worse) MTAs that accept it.
4802 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4803 will now be deprecated.
4805 PH/56 New os.c-cygwin from the Cygwin maintainer.
4807 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4808 formats (previously only available in exim formats via -bpr, -bpru,
4809 and -bpra. Now also available in native and exiqgrep formats)
4811 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4812 with very large, slow to parse queues
4814 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4816 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4818 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4819 responses to authentication challenges, though it was showing the
4820 challenges; (ii) I've removed the CR characters from the debug output for
4823 PH/58 Allow for the insertion of a newline as well as a space when a string
4824 is turned into more than one encoded-word during RFC 2047 encoding. The
4825 Sieve code now uses this.
4827 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4828 data_4xx, lost_connection, tls_required.
4830 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4831 message was being sent as an SMTP response.
4833 PH/61 Add -l and -k options to exicyclog.
4835 PH/62 When verifying, if an address was redirected to one new address, so that
4836 verification continued, and the new address failed or deferred after
4837 having set something in $address_data, the value of $address_data was not
4838 passed back to the ACL. This was different to the case when no
4839 redirection occurred. The value is now passed back in both cases.
4841 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4842 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4843 use login_cap.h, so on its own it isn't the distinguishing feature. The
4844 new name refers directly to the setclassresources() function.
4846 PH/65 Added configuration files for NetBSD3.
4848 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4850 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4851 is preferred over IPv4.
4853 PH/68 The bounce_return_message and bounce_return_body options were not being
4854 honoured for bounces generated during the reception of non-SMTP messages.
4855 In particular, this applied to messages rejected by the ACL. This bug has
4856 been fixed. However, if bounce_return_message is true and bounce_return_
4857 body is false, the headers that are returned for a non-SMTP message
4858 include only those that have been read before the error was detected.
4859 (In the case of an ACL rejection, they have all been read.)
4861 PH/69 The HTML version of the specification is now built in a directory called
4862 spec_html instead of spec.html, because the latter looks like a path with
4863 a MIME-type, and this confuses some software.
4865 PH/70 Catch two compiler warnings in sieve.c.
4867 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4868 function verify_get_ident() calls ip_connect() to connect a socket, but
4869 if the "connect()" function timed out, ip_connect() used to close the
4870 socket. However, verify_get_ident() also closes the socket later, and in
4871 between Exim writes to the log, which may get opened at this point. When
4872 the socket was closed in ip_connect(), the log could get the same file
4873 descriptor number as the socket. This naturally causes chaos. The fix is
4874 not to close the socket in ip_connect(); the socket should be closed by
4875 the function that creates it. There was only one place in the code where
4876 this was missing, in the iplookup router, which I don't think anybody now
4877 uses, but I've fixed it anyway.
4879 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4880 well as to direct DNS lookups. Otherwise the handling of names in host
4881 lists is inconsistent and therefore confusing.
4887 PH/01 Two changes to the default runtime configuration:
4889 (1) Move the checks for relay_from_hosts and authenticated clients from
4890 after to before the (commented out) DNS black list checks.
4892 (2) Add control=submission to the relay_from_hosts and authenticated
4893 clients checks, on the grounds that messages accepted by these
4894 statements are most likely to be submissions.
4896 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4898 (1) Generate an error if the third argument for the ${prvs expansion is
4901 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4904 (3) Reset the variables that are obtained from the first argument of
4905 ${prvscheck and used in the second argument before leaving the code,
4906 because their memory is reclaimed, so using them afterwards may do
4909 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4910 one (it's much easier than Tom thought :-).
4912 (5) Because of (4), we can now allow for the use of $prvscheck_result
4913 inside the third argument.
4915 PH/03 For some reason, the default setting of PATH when running a command from
4916 a pipe transport was just "/usr/bin". I have changed it to
4919 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4920 anything to be listed in the output from -bV.
4922 PH/05 When a filter generated an autoreply, the entire To: header line was
4923 quoted in the delivery log line, like this:
4925 => >A.N.Other <ano@some.domain> <original@ddress> ...
4927 This has been changed so that it extracts the operative address. There
4928 may be more than one such address. If so, they are comma-separated, like
4931 => >ano@some.domain,ona@other.domain <original@ddress> ...
4933 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4934 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4935 not being looked up in the rDNS to get a host name, Exim was showing the
4936 IP address twice in Received: lines, even though the IP addresses were
4937 identical. For example:
4939 Received: from [1.2.3.4] (helo=[1.2.3.4])
4941 However, if the real host name was known, it was omitting the HELO data
4942 if it matched the actual IP address. This has been tidied up so that it
4943 doesn't show the same IP address twice.
4945 PH/07 When both +timestamp and +memory debugging was on, the value given by
4946 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4947 called by the debug printing, thereby overwriting the timestamp buffer.
4948 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4950 PH/08 When the original message was included in an autoreply transport, it
4951 always said "this is a copy of the message, including all the headers",
4952 even if body_only or headers_only was set. It now gives an appropriate
4955 PH/09 Applied a patch from the Sieve maintainer which:
4957 o fixes some comments
4958 o adds the (disabled) notify extension core
4959 o adds some debug output for the result of if/elsif tests
4960 o points to the current vacation draft in the documentation
4961 and documents the missing references header update
4965 o fixes a bug in processing the envelope test (when testing
4966 multiple envelope elements, the last element determined the
4969 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4970 Electronic Mail") by including:
4972 Auto-submitted: auto-generated
4974 in the messages that it generates (bounce messages and others, such as
4975 warnings). In the case of bounce messages for non-SMTP messages, there was
4976 also a typo: it was using "Auto_submitted" (underscore instead of
4977 hyphen). Since every message generated by Exim is necessarily in response
4978 to another message, thes have all been changed to:
4980 Auto-Submitted: auto-replied
4982 in accordance with these statements in the RFC:
4984 The auto-replied keyword:
4986 - SHOULD be used on messages sent in direct response to another
4987 message by an automatic process,
4989 - MUST NOT be used on manually-generated messages,
4991 - MAY be used on Delivery Status Notifications (DSNs) and Message
4992 Disposition Notifications (MDNs),
4994 - MUST NOT be used on messages generated by automatic or periodic
4995 processes, except for messages which are automatic responses to
4998 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4999 to the default Received: header definition.
5001 PH/12 Added log selector acl_warn_skipped (default on).
5003 PH/13 After a successful wildlsearch lookup, discard the values of numeric
5004 variables because (a) they are in the wrong storage pool and (b) even if
5005 they were copied, it wouldn't work properly because of the caching.
5007 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
5008 checking when decoding. Apparently there are clients that generate
5009 overlong encoded strings. Why am I not surprised?
5011 PH/15 If the first argument of "${if match_address" was not empty, but did not
5012 contain an "@" character, Exim crashed. Now it writes a panic log message
5013 and treats the condition as false.
5015 PH/16 In autoreply, treat an empty string for "once" the same as unset.
5017 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
5018 extension "envelope-auth". The code is finished and in agreement with
5019 other implementations, but there is no documentation so far and in fact,
5020 nobody wrote the draft yet. This extension is currently #undef'ed, thus
5021 not changing the active code.
5023 Print executed "if" and "elsif" statements when debugging is used. This
5024 helps a great deal to understand what a filter does.
5026 Document more things not specified clearly in RFC3028. I had all this
5027 sorted out, when out of a sudden new issues came to my mind. Oops."
5029 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
5032 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
5033 canonical form (as documented). However, after a host name lookup from
5034 the IP address, check_host() was doing a simple string comparison with
5035 addresses acquired from the DNS when checking that the found name did
5036 have the original IP as one of its addresses. Since any found IPv6
5037 addresses are likely to be in abbreviated form, the comparison could
5038 fail. Luckily, there already exists a function for doing the comparison
5039 by converting both addresses to binary, so now that is used instead of
5040 the text comparison.
5042 PH/20 There was another similar case to PH/19, when a complete host name was
5043 given in a host list; looking up its IP address could give an abbreviated
5044 form, whereas the current host's name might or might not be abbreviated.
5045 The same fix has been applied.
5051 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
5052 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5055 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5056 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5058 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5060 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5061 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5062 Also, for "Auto-Submitted", treat anything other than "no" as
5063 non-personal, in accordance with RFC 3834. (Previously it treated
5064 anything starting "auto-" as non-personal.)
5066 TF/01 The control=submission/name=... option had a problem with syntax
5067 errors if the name included a slash character. The /name= option
5068 now slurps the rest of the string, so it can include any characters
5069 but it must come last in the list of options (after /sender_retain
5072 PH/05 Some modifications to the interface to the fake nameserver for the new
5080 TK/01 Added the "success_on_redirect" address verification option. See
5081 NewStuff for rationale and an example.
5083 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5085 PH/02 Patch to exigrep to allow it to work on syslog lines.
5087 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5088 fread() to skip over the body file's header line, because in Cygwin the
5089 header line is locked and is inaccessible.
5091 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5092 co-exist for some time) to make it clear that it is the Exim ID that is
5093 referenced, not the Message-ID: header line.
5095 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5096 string_format() function, because snprintf() does not exist on all
5099 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5100 ${stat: expansion item.
5102 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5103 protocol synchronization error", to keep the pedants happy.
5105 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5106 well as for IRIX systems, when gcc is being used. See the host.c source
5109 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5111 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5114 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5115 transport and to the smtp transport in LMTP mode.
5117 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5119 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5120 run a filter in a subprocess. This could lead to confusion in subsequent
5121 lookups in the parent process. There should also be a search_tidyup() at
5122 the end of the subprocess.
5124 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5125 only if the host matched helo_try_verify_hosts, which caused the
5126 verification to occur when the EHLO/HELO command was issued. The ACL just
5127 tested the remembered result. Now, if a previous verification attempt has
5128 not happened, "verify = helo" does it there and then.
5130 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5132 TK/03 Fix log output including CR from clamd.
5134 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5135 exist provoked a memory error which could cause a segfault.
5137 PH/15 Installed PCRE 6.2
5139 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5141 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5142 of the problem. Specifically, suggested +O2 rather than +O1 for the
5145 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5147 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5148 record, the port was not correctly logged when the outgoing_port log
5149 selector was set (it logged the transort's default port).
5151 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5152 fallback_hosts, and "hosts" in the smtp transport.
5154 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5155 host errors such as "Connection refused".
5157 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5158 authentication with radiusclient 0.4.9:
5160 - Error returned from rc_read_config was caught wrongly
5161 - Username/password not passed on to radius server due to wrong length.
5163 The presumption is that some radiusclient API changes for 4.51/PH/17
5164 were not taken care of correctly. The code is still untested by me (my
5165 Linux distribution still has 0.3.2 of radiusclient), but it was
5166 contributed by a Radius user.
5168 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5169 expanding the "port" option of the smtp transport.
5171 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5172 while reading a MIME header. Thanks to Tom Hughes for a patch.
5174 PH/24 Include config.h inside local_scan.h so that configuration settings are
5177 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5178 that in an ACL for RCPT (for example), you can examine exactly what was
5181 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5182 commands, but it was not correctly comparing the address with the actual
5183 client host address. Thus, it would show the EHLO address in Received:
5184 header lines when this was not necessary.
5186 PH/27 Added the % operator to ${eval:}.
5188 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5189 it should be ignoring failures (because with -C, for example, it has lost
5190 privilege). It wasn't ignoring creation failures other than "already
5193 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5196 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5197 because an input line was too long, either on its own, or by virtue of
5198 too many continuations, the temporary file was not being removed, and the
5199 return code was incorrect.
5201 PH/31 Missing "BOOL" in function definition in filtertest.c.
5203 PH/32 Applied Sieve patches from the maintainer.
5205 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5207 PH/33 Added "verify = not_blind".
5209 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5210 Local/Makefile (with some defaults set). These are used in built scripts
5211 such as exicyclog, but they have never been used in the exim_install
5212 script (though there are many overriding facilities there). I have
5213 arranged that the exim_install script now takes note of these two
5216 PH/35 Installed configuration files for Dragonfly.
5218 PH/36 When a locally submitted message by a trusted user did not contain a
5219 From: header, and the sender address was obtained from -f or from an SMTP
5220 MAIL command, and the trusted user did not use -F to supply a sender
5221 name, $originator_name was incorrectly used when constructing a From:
5222 header. Furthermore, $originator_name was used for submission mode
5223 messages from external hosts without From: headers in a similar way,
5224 which is clearly wrong.
5226 PH/37 Added control=suppress_local_fixups.
5228 PH/38 When log_selector = +received_sender was set, and the addition of the
5229 sender made the log line's construction buffer exactly full, or one byte
5230 less than full, an overflow happened when the terminating "\n" was
5233 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5234 when the result of a list match is failure because a DNS lookup failed.
5236 PH/40 RM_COMMAND is now used in the building process.
5238 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5239 the "build-* directories that it finds.
5241 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5242 address in a domain literal was a prefix of an interface address.
5244 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5245 when verifying a sender address, unless rewrite_headers is false.
5247 PH/44 Wrote a long comment about why errors_to addresses are verified as
5248 recipients, not senders.
5250 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5251 the ratelimit ACL was added.
5253 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5255 PH/46 Added extra information about PostgreSQL errors to the error string.
5257 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5258 avoiding the need to install special zones in a real server. This is
5259 backwards compatible; if it can't find the fake resolver, it drops back.
5260 Thus, both old and new test suites can be run.
5262 TF/02 Added util/ratelimit.pl
5264 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5265 clock is set back in time.
5267 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5268 Candler <B.Candler@pobox.com>.
5270 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5271 OK for addresses that are the result of redirections.
5273 PH/48 A number of further additions for the benefit of the new test suite,
5274 including a fake gethostbyname() that interfaces to the fake DNS resolver
5277 TF/06 The fix for widen_domains has also been applied to qualify_single and
5278 search_parents which are the other dnslookup options that can cause
5281 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5284 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5286 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5287 service" if it encountered an MX record with an empty target hostname.
5288 The message is now "an MX or SRV record indicated no SMTP service".
5290 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5291 if the DNS of the sending site is misconfigured. This is quite a
5292 common situation. This change restores the behaviour of treating a
5293 helo verification defer as a failure.
5295 PH/51 If self=fail was set on a router, the bounce message did not include the
5296 actual error message.
5302 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5304 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5305 command itself ended in error, the underlying message about the transport
5306 filter timeout was being overwritten with the pipe command error. Now the
5307 underlying error message should be appended to the second error message.
5309 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5311 PH/02 Reduce the amount of output that "make" produces by default. Full output
5312 can still be requested.
5314 PH/03 The warning log line about a condition test deferring for a "warn" verb
5315 was being output only once per connection, rather than after each
5316 occurrence (because it was using the same function as for successful
5317 "warn" verbs). This seems wrong, so I have changed it.
5319 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5320 it should not have, which might have caused a crash in the right
5321 circumstances, but probably never did.
5323 PH/04 Installed a modified version of Tony Finch's patch to make submission
5324 mode fix the return path as well as the Sender: header line, and to
5325 add a /name= option so that you can make the user's friendly name appear
5328 TF/03 Added the control = fakedefer ACL modifier.
5330 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5331 Mark Lowes for thorough testing.
5333 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5335 TK/03 Merged latest SRS patch from Miles Wilton.
5337 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5338 with the definition in sysexits.h (which is #included earlier).
5339 Fortunately, Exim does not actually use EX_OK. The code used to try to
5340 preserve the sysexits.h value, by assuming that macro definitions were
5341 scanned for macro replacements. I have been disabused of this notion,
5342 so now the code just undefines EX_OK before #including unistd.h.
5344 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5345 in the smtp transport. When a block could not be written in a single
5346 write() function, the timeout was being re-applied to each part-write.
5347 This seems wrong - if the receiver was accepting one byte at a time it
5348 would take for ever. The timeout is now adjusted when this happens. It
5349 doesn't have to be particularly precise.
5351 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5352 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5354 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5355 without a domain if the check to <postmaster@domain> fails.
5357 SC/01 Eximstats: added -xls and the ability to specify output files
5358 (patch written by Frank Heydlauf).
5360 SC/02 Eximstats: use FileHandles for outputting results.
5362 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5364 SC/04 Eximstats: fixed display of large numbers with -nvr option
5366 SC/05 Eximstats: fixed merging of reports with empty tables.
5368 SC/06 Eximstats: added the -include_original_destination flag
5370 SC/07 Eximstats: removed tabs and trailing whitespace.
5372 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5374 TK/06 MBOX spool code: Add real "From " MBOX separator line
5375 so the .eml file is really in mbox format (even though
5376 most programs do not really care). Patch from Alex Miller.
5378 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5379 The latter is generated from $received_to and is only set if the
5380 message has one envelope recipient. SA can use these headers,
5381 obviously out-of-the-box. Patch from Alex Miller.
5383 PH/08 The ${def test on a variable was returning false if the variable's
5384 value was "0", contrary to what the specification has always said!
5385 The result should be true unless the variable is empty.
5387 PH/09 The syntax error of a character other than { following "${if
5388 def:variable_name" (after optional whitespace) was not being diagnosed.
5389 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5390 accidental colon was present, for example, could give incorrect results.
5392 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5393 result is used (not including appendfile, where other changes are about
5396 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5397 This involved changing a lot of size variables from int to off_t. It
5398 should work with maildirs and everything.
5400 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5401 spamd dying while we are connected to it.
5403 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5406 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5407 function for BDB 4.3.
5409 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5411 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5412 the sources for PCRE have been re-arranged and more files are now
5415 PH/15 The code I had for printing potentially long long variables in PH/11
5416 above was not the best (it lost precision). The length of off_t variables
5417 is now inspected at build time, and an appropriate printing format (%ld
5418 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5419 to be "long long int" or "long int". This is needed for the internal
5420 formatting function string_vformat().
5422 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5423 the configuration file to be ":syslog", then the script "guesses" where
5424 the logs files are, rather than using the compiled in default. In our
5425 case the guess is not the same as the compiled default, so the script
5426 suddenly stopped working when I started to use syslog. The patch checks
5427 to see if log_file_path is "". If so, it attempts to read it from exim
5428 with no configuration file to get the compiled in version, before it
5429 falls back to the previous guessing code."
5431 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5432 implementing BATV in an Exim configuration. See NewStuff for the gory
5435 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5436 Makefile that are specific to HP-UX.
5438 PH/18 If the "use_postmaster" option was set for a recipient callout together
5439 with the "random" option, the postmaster address was used as the MAIL
5440 FROM address for the random test, but not for the subsequent recipient
5441 test. It is now used for both.
5443 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5444 patch removes a few documentation additions to RFC 3028, because the
5445 latest draft now contains them. It adds the new en;ascii-case comparator
5446 and a new error check for 8bit text in MIME parts. Comparator and
5447 require names are now matched exactly. I enabled the subaddress
5448 extension, but it is not well tested yet (read: it works for me)."
5450 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5451 rework some of the code of TK/09 above to avoid the hardwired use of
5452 "%lld" and "long long". Replaced the call to snprintf() with a call to
5455 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5456 records point to non-existent hosts", "retry timeout exceeded", and
5457 "retry time not reached for any host after a long failure period".
5459 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5460 experimental DomainKeys support:
5462 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5463 (2) On an error such as an illegally used "control", the wrong name for
5464 the control was given.
5466 These problems did NOT occur unless DomainKeys support was compiled.
5468 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5470 PH/24 Added ${if match_ip condition.
5472 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5473 databases so that it will be absolutely obvious if a crash occurs in the
5474 DB library. This is a regular occurrence (often caused by mis-matched
5477 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5478 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5479 picked up on a user's system that detects such things. There doesn't seem
5480 to be a gcc warning option for this - only an attribute that has to be
5481 put on the function's prototype. It seems that in Fedora Core 4 they have
5482 set this on a number of new functions. No doubt there will be more in due
5485 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5486 specify a transport. However, if an address that was verified by such a
5487 router was the subject of a callout, Exim crashed because it tried to
5488 read the rcpt_include_affixes from the non-existent transport. Now it
5489 just assumes that the setting of that option is false. This bug was
5490 introduced by 4.51/PH/31.
5492 PH/28 Changed -d+all to exclude +memory, because that information is very
5493 rarely of interest, but it makes the output a lot bigger. People tend to
5494 do -d+all out of habit.
5496 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5497 code in os-type was giving problems when libc.so lives in lib64, like on
5500 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5501 aren't the modern standard, and it seems that some systems' include files
5502 don't always have them. Exim was already checking for some of the newer
5503 ones like T_AAAA, and defining it itself. I've added checks for all the
5504 record types that Exim uses.
5506 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5507 not automatically generating a new one, as it is supposed to. This
5508 prevented TLS from working. If the file did exist, but contained invalid
5509 data, a new version was generated, as expected. It was only the case of a
5510 non-existent file that was broken.
5512 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5513 with a change in libdomainkeys > 0.64.
5515 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5516 from DNS. If the selector record carries the flag, it now has
5517 precedence over the domain-wide flag.
5519 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5521 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5522 the use of a port name that isn't defined in /etc/services) occurred, the
5523 message was deferred as in a normal delivery, and thus remained on the
5524 spool, instead of being failed because of the mua_wrapper setting. This
5525 is now fixed, and I tidied up some of the mua_wrapper messages at the
5528 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5529 the messages in a hash of arrays rather than using individual hashes.
5530 This is a bit cleaner and results in dramatic memory savings, albeit
5531 at a slight CPU cost.
5533 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5534 as requested by Marc Sherman.
5536 SC/10 Eximstats: added histograms for user specified patterns as requested
5539 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5541 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5542 fopen() in the content-scanning modules that did not already have it.
5548 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5549 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5551 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5553 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5555 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5556 to test Sieve filters that use "vacation".
5558 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5559 that changes the way the GnuTLS parameters are stored in the cache file.
5560 The new format can be generated externally. For backward compatibility,
5561 if the data in the cache doesn't make sense, Exim assumes it has read an
5562 old-format file, and it generates new data and writes a new file. This
5563 means that you can't go back to an older release without removing the
5566 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5567 work if there are any delivery delays because "one_time" forces the
5568 parent to be marked "delivered", so its unseen clone is never tried
5569 again. For this reason, Exim now forbids the simultaneous setting of
5572 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5573 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5574 entry if you want to know the details. The fix, however, neglected to
5575 consider the case when local delivery batching is involved. The test for
5576 "previously delivered" was not happening when checking to see if an
5577 address could be batched with a previous (undelivered) one; under
5578 certain circumstances this could lead to multiple deliveries to the same
5581 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5582 in its include files, and this causes problems building Exim.
5584 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5585 header_syntax) but Exim was just ignoring anything given after a slash.
5586 In particular, this caused confusion with an attempt to use "verify =
5587 reverse_host_lookup/defer_ok". An error is now given when options are
5588 supplied for verify items that do not have them. (Maybe reverse_host_
5589 lookup should have a defer_ok option, but that's a different point.)
5591 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5592 defined by RFC 821) to 2048, because there were problems with some AUTH
5593 commands, and RFC 1869 says the size should be increased for extended
5594 SMTP commands that take arguments.
5596 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5599 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5600 "unknown" error; now it says that the functionality isn't in the binary.
5602 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5603 an address' error message when a string expansion fails (syntax or
5604 whatever). Otherwise the password may appear in the log. Following change
5605 PH/42 below, there is no longer a chance of it appearing in a bounce
5608 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5610 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5611 of its addresses was ever tried. (Bugzilla bug #2.)
5613 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5614 the result incorrectly in the debug output. (It correctly added a newline
5615 to what was transported.)
5617 TF/01 Added $received_time.
5619 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5620 commented out examples of how to interface to a virus scanner and to
5621 SpamAssassin. Also added commented examples of av_scanner and
5622 spamd_address settings.
5624 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5625 and controls are allowed in which ACLs. There were a couple of minor
5626 errors. Some of the entries in the conditions table (which is a table of
5627 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5628 negation of where the condition IS allowed.
5630 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5632 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5633 header file does not have a version number, so I've had to invent a new
5634 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5635 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5636 radiusclient), but it was contributed by a Radius user.
5638 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5639 files or directories, for OpenSSL.
5641 PH/19 When an Exim process that is running as root has to create an Exim log
5642 file, it does so in a subprocess that runs as exim:exim so as to get the
5643 ownership right at creation (otherwise, other Exim processes might see
5644 the file with the wrong ownership). There was no test for failure of this
5645 fork() call, which would lead to the process getting stuck as it waited
5646 for a non-existent subprocess. Forks do occasionally fail when resources
5647 run out. I reviewed all the other calls to fork(); they all seem to check
5650 PH/20 When checking for unexpected SMTP input at connect time (before writing
5651 the banner), Exim was not dealing correctly with a non-positive return
5652 from the read() function. If the client had disconnected by this time,
5653 the result was a log entry for a synchronization error with an empty
5654 string after "input=" when read() returned zero. If read() returned -1
5655 (an event I could not check), uninitialized data bytes were printed.
5656 There were reports of junk text (parts of files, etc) appearing after
5659 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5661 PH/22 Added support for macro redefinition, and (re)definition in between
5662 driver and ACL definitions.
5664 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5665 forgetting to use the resulting value; it was using the unexpanded value.
5667 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5668 hadn't been configured. The fix is from Juergen Kreileder, who
5669 understands it better than I do:
5671 "Here's what I see happening with three configured cyrus_sasl
5672 authenticators configured (plain, login, cram-md5):
5674 On startup auth_cyrus_sasl_init() gets called for each of these.
5675 This means three calls to sasl_listmech() without a specified mech_list.
5676 => SASL tests which mechs of all available mechs actually work
5677 => three warnings about OTP not working
5678 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5680 With the patch, sasl_listmech() also gets called three times. But now
5681 SASL's mech_list option is set to the server_mech specified in the the
5682 authenticator. Or in other words, the answer from sasl_listmech()
5683 gets limited to just the mech you're testing for (which is different
5685 => the return list contains just 'plain' or 'login', 'cram-md5' or
5686 nothing depending on the value of ob->server_mech.
5688 I've just tested the patch: Authentication still works fine,
5689 unavailable mechs specified in the exim configuration are still
5690 caught, and the auth.log warnings about OTP are gone."
5692 PH/25 When debugging is enabled, the contents of the command line are added
5693 to the debugging output, even when log_selector=+arguments is not
5696 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5697 answer is "GNU", and only if the return is "GNU/something" is the answer
5700 PH/27 $acl_verify_message is now set immediately after the failure of a
5701 verification in an ACL, and so is available in subsequent modifiers. In
5702 particular, the message can be preserved by coding like this:
5704 warn !verify = sender
5705 set acl_m0 = $acl_verify_message
5707 Previously, $acl_verify_message was set only while expanding "message"
5708 and "log_message" when a very denied access.
5710 PH/28 Modified OS/os.c-Linux with
5712 -#ifndef OS_LOAD_AVERAGE
5713 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5715 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5716 nomenclature these days.)
5718 PH/29 Installed patch from the Sieve maintainer that adds the options
5719 sieve_useraddress and sieve_subaddress to the redirect router.
5721 PH/30 In these circumstances:
5722 . Two addresses routed to the same list of hosts;
5723 . First host does not offer TLS;
5724 . First host accepts first address;
5725 . First host gives temporary error to second address;
5726 . Second host offers TLS and a TLS session is established;
5727 . Second host accepts second address.
5728 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5729 and peerdn, if requested) that were in fact used only for the second
5732 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5733 attention to any local part prefix or suffix that was matched by the
5734 router that accepted the address. It now behaves in the same way as it
5735 does for delivery: the affixes are removed from the local part unless
5736 rcpt_include_affixes is set on the transport.
5738 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5739 timeout during the DATA phase of an incoming message.
5741 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5742 applied a patch sanctioned by the Sieve maintainer.
5744 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5745 the uid or gid is negative. A case of a negative gid caused this to be
5746 noticed. The fix allows for either to be negative.
5748 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5749 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5752 PH/36 The change PH/12 above was broken. Fixed it.
5754 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5755 the grounds that routing the same address twice would always produce the
5756 same answer. This might have been true once, but it is certainly no
5757 longer true now. Routing a child address may depend on the previous
5758 routing that produced that child. Some complicated redirection strategies
5759 went wrong when messages had multiple recipients, and made Exim's
5760 behaviour dependent on the order in which the addresses were given.
5762 I have moved the duplicate checking until after the routing is complete.
5763 Exim scans the addresses that are assigned to local and remote
5764 transports, and removes any duplicates. This means that more work will be
5765 done, as duplicates will always all be routed, but duplicates are
5766 presumably rare, so I don't expect this is of any significance.
5768 For deliveries to pipes, files, and autoreplies, the duplicate checking
5769 still happens during the routing process, since they are not going to be
5772 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5773 It corrects a timeout issue with spamd. This is Ian's comment: "The
5774 background is that sometimes spamd either never reads data from a
5775 connection it has accepted, or it never writes response data. The exiscan
5776 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5777 blindly assumes that writes won't block so it may never time out."
5779 PH/39 Allow G after quota size as well as K and M.
5781 PH/40 The value set for $authenticated_id in an authenticator may not contain
5782 binary zeroes or newlines because the value is written to log lines and
5783 to spool files. There was no check on this. Now the value is run through
5784 the string_printing() function so that such characters are converted to
5785 printable escape sequences.
5787 PH/41 $message_linecount is a new variable that contains the total number of
5788 lines in the message. Compare $body_linecount, which is the count for the
5791 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5792 bounce and delay warning messages, except in certain special cases, which
5795 (a) An SMTP error message from a remote host;
5796 (b) A message specified in a :fail: redirection;
5797 (c) A message specified in a "fail" command in a system filter;
5798 (d) A message specified in a FAIL return from the queryprogram router;
5799 (e) A message specified by the cannot_route_message router option.
5801 In these cases only, Exim does include the error details in bounce and
5802 warning messages. There are also a few cases where bland messages such
5803 as "unrouteable address" or "local delivery error" are given.
5805 PH/43 $value is now also set for the "else" part of a ${run expansion.
5807 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5808 being worked on, but at least Exim now implements the latest version to
5811 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5812 process to complete was treated as a delivery failure, a timeout while
5813 writing the message to the pipe was logged, but erroneously treated as a
5814 successful delivery. Such timeouts include transport filter timeouts. For
5815 consistency with the overall process timeout, these timeouts are now
5816 treated as errors, giving rise to delivery failures by default. However,
5817 there is now a new Boolean option for the pipe transport called
5818 timeout_defer, which, if set TRUE, converts the failures into defers for
5819 both kinds of timeout. A transport filter timeout is now identified in
5822 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5823 systems where "make" and "gmake" are different, calling "gmake" at top
5824 level broke things. I've arranged for the value of $(MAKE) to be passed
5825 from the Makefile to this script so that it can call the same version of
5829 A note about Exim versions 4.44 and 4.50
5830 ----------------------------------------
5832 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5833 changes of various kinds. As a consequence, a big documentation update was
5834 needed. This delayed the release for rather longer than seemed good, especially
5835 in the light of a couple of (minor) security issues. Therefore, the changes
5836 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5837 release. So 4.44 and 4.50 are in effect two different branches that both start
5840 I have left the 4.50 change log unchanged; it contains all the changes since
5841 4.43. The change log for 4.44 is below; many of its items are identical to
5842 those for 4.50. This seems to be the most sensible way to preserve the
5843 historical information.
5849 1. Minor wording change to the doc/README.SIEVE file.
5851 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5852 computation of the current number of files was incorrect.
5854 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5855 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5858 4. Give more explanation in the error message when the command for a transport
5859 filter fails to execute.
5861 5. There are several places where Exim runs a non-Exim command in a
5862 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5863 was being done only for the command run by the queryprogram router. It is
5864 now done for all such subprocesses. The other cases are: ${run, transport
5865 filters, and the commands run by the lmtp and pipe transports.
5867 6. Added CONFIGURE_GROUP build-time option.
5869 7. Some older OS have a limit of 256 on the maximum number of file
5870 descriptors. Exim was using setrlimit() to set 1000 as a large value
5871 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5872 systems. I've change it so that if it can't get 1000, it tries for 256.
5874 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5875 was an oversight, and furthermore, ever since the addition of extra
5876 controls (e.g. 4.43/32), the checks on when to allow different forms of
5877 "control" were broken. There should now be diagnostics for all cases when a
5878 control that does not make sense is encountered.
5880 9. Added the /retain_sender option to "control=submission".
5882 10. $recipients is now available in the predata ACL (oversight).
5884 11. Tidy the search cache before the fork to do a delivery from a message
5885 received from the command line. Otherwise the child will trigger a lookup
5886 failure and thereby defer the delivery if it tries to use (for example) a
5887 cached ldap connection that the parent has called unbind on.
5889 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5890 of $address_data from the recipient verification was clobbered by the
5891 sender verification.
5893 13. The value of address_data from a sender verification is now available in
5894 $sender_address_data in subsequent conditions in the ACL statement.
5896 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5898 15. Added a new option "connect=<time>" to callout options, to set a different
5901 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5902 was its contents. (It was OK if the option was not defined at all.)
5904 17. A "Completed" log line is now written for messages that are removed from
5905 the spool by the -Mrm option.
5907 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5908 information about exactly what failed.
5910 19. Added -dd to debug only the daemon process.
5912 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5913 handles timeouts, both on the server side and network timeouts. Renamed the
5914 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5916 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5917 It is now set to "smtps".
5919 22. $host_address is now set to the target address during the checking of
5920 ignore_target_hosts.
5922 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5923 being passed; this would have caused $sender_host_name to have been used if
5924 matching the list had actually called for a host name (not very likely,
5925 since this list is usually IP addresses). A host name is now passed as
5928 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5929 code that specifies a non-restarting handler (typically sigaction() in
5930 modern systems) in an attempt to fix a rare and obscure crash bug.
5932 25. Narrowed the window for a race in the daemon that could cause it to ignore
5933 SIGCHLD signals. This is not a major problem, because they are used only to
5934 wake it up if nothing else does.
5936 26. A malformed maildirsize file could cause Exim to calculate negative values
5937 for the mailbox size or file count. Odd effects could occur as a result.
5938 The maildirsize information is now recalculated if the size or filecount
5941 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5942 support for a long time. Removed HAVE_SYS_VFS_H.
5944 28. Installed the latest version of exipick from John Jetmore.
5946 29. In an address list, if the pattern was not a regular expression, an empty
5947 subject address (from a bounce message) matched only if the pattern was an
5948 empty string. Non-empty patterns were not even tested. This was the wrong
5949 because it is perfectly reasonable to use an empty address as part of a
5950 database query. An empty address is now tested by patterns that are
5951 lookups. However, all the other forms of pattern expect the subject to
5952 contain a local part and a domain, and therefore, for them, an empty
5953 address still always fails if the pattern is not itself empty.
5955 30. Exim went into a mad DNS loop when attempting to do a callout where the
5956 host was specified on an smtp transport, and looking it up yielded more
5957 than one IP address.
5959 31. Re-factored the code for checking spool and log partition space into a
5960 function that finds that data and another that does the check. The former
5961 is then used to implement four new variables: $spool_space, $log_space,
5962 $spool_inodes, and $log_inodes.
5964 32. The RFC2047 encoding function was originally intended for short strings
5965 such as real names; it was not keeping to the 75-character limit for
5966 encoded words that the RFC imposes. It now respects the limit, and
5967 generates multiple encoded words if necessary. To be on the safe side, I
5968 have increased the buffer size for the ${rfc2047: expansion operator from
5971 33. It is now permitted to omit both strings after an "if" condition; if the
5972 condition is true, the result is "true". As before, when the second string
5973 is omitted, a false condition yields an empty string. This makes it less
5974 cumbersome to write custom ACL and router conditions.
5976 34. Failure to deliver a bounce message always caused it to be frozen, even if
5977 there was an errors_to setting on the router. The errors_to setting is now
5980 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5981 canonical form (fully expanded) before being placed in
5982 $sender_host_address.
5984 36. The table in the code that translates DNS record types into text (T_A to
5985 "A" for instance) was missing entries for NS and CNAME. It is just possible
5986 that this could have caused confusion if both these types were looked up
5987 for the same domain, because the text type is used as part of Exim's
5988 per-process caching. But the chance of anyone hitting this buglet seems
5991 37. The dnsdb lookup has been extended in a number of ways.
5993 (1) There is a new type, "zns", which walks up the domain tree until it
5994 finds some nameserver records. It should be used with care.
5996 (2) There is a new type, "mxh", which is like "mx" except that it returns
5997 just the host names, not the priorities.
5999 (3) It is now possible to give a list of domains (or IP addresses) to be
6000 looked up. The behaviour when one of the lookups defers can be
6001 controlled by a keyword.
6003 (4) It is now possible to specify the separator character for use when
6004 multiple records are returned.
6006 38. The dnslists ACL condition has been extended: it is now possible to supply
6007 a list of IP addresses and/or domains to be looked up in a particular DNS
6010 39. Added log_selector=+queue_time_overall.
6012 40. When running the queue in the test harness, wait just a tad after forking a
6013 delivery process, to get repeatability of debugging output.
6015 41. Include certificate and key file names in error message when GnuTLS fails
6016 to set them up, because the GnuTLS error message doesn't include the name
6017 of the failing file when there is a problem reading it.
6019 42. Allow both -bf and -bF in the same test run.
6021 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
6023 44. The "Exiscan patch" is now merged into the mainline Exim source.
6025 45. Sometimes the final signoff response after QUIT could fail to get
6026 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6027 < 0 before doing a fflush(). This bug looks as though it goes back to the
6028 introduction of TLS in release 3.20, but "sometimes" must have been rare
6029 because the tests only now provoked it.
6031 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
6032 (this can affect the format of dates).
6034 47. exim_tidydb, when checking for the continued existence of a message for
6035 which it has found a message-specific retry record, was not finding
6036 messages that were in split spool directories. Consequently, it was
6037 deleting retry records that should have stayed in existence.
6039 48. Steve fixed some bugs in eximstats.
6041 49. The SPA authentication driver was not abandoning authentication and moving
6042 on to the next authenticator when an expansion was forced to fail,
6043 contradicting the general specification for all authenticators. Instead it
6044 was generating a temporary error. It now behaves as specified.
6046 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
6047 (the order specifies the preference for clients). The order is now AES256,
6048 AES128, 3DES, ARCFOUR128.
6050 51. Small patch to Sieve code - explicitly set From: when generating an
6053 52. Exim crashed if a remote delivery caused a very long error message to be
6054 recorded - for instance if somebody sent an entire SpamAssassin report back
6055 as a large number of 550 error lines. This bug was coincidentally fixed by
6056 increasing the size of one of Exim's internal buffers (big_buffer) that
6057 happened as part of the Exiscan merge. However, to be on the safe side, I
6058 have made the code more robust (and fixed the comments that describe what
6061 53. Now that there can be additional text after "Completed" in log lines (if
6062 the queue_time_overall log selector is set), a one-byte patch to exigrep
6063 was needed to allow it to recognize "Completed" as not the last thing in
6066 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6067 patch that reportedly fixes this has been added. I am not expert enough to
6068 create a test for it. This is what the patch creator wrote:
6070 "I found a little strange behaviour of ldap code when working with
6071 Windows 2003 AD Domain, where users was placed in more than one
6072 Organization Units. When I tried to give exim partial DN, the exit code
6073 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6074 But simultaneously result of request was absolutely normal ldap result,
6075 so I produce this patch..."
6077 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6078 REFERENCE, so I have modified the code to exclude the patch when that macro
6081 55. Some experimental protocols are using DNS PTR records for new purposes. The
6082 keys for these records are domain names, not reversed IP addresses. The
6083 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6084 leaves it alone. Component reversal etc. now happens only for IP addresses.
6087 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6089 57. Double the size of the debug message buffer (to 2048) so that more of very
6090 long debug lines gets shown.
6092 58. The exicyclog utility now does better if the number of log files to keep
6093 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6095 59. Two changes related to the smtp_active_hostname option:
6097 (1) $smtp_active_hostname is now available as a variable.
6098 (2) The default for smtp_banner uses $smtp_active_hostname instead
6099 of $primary_hostname.
6101 60. The host_aton() function is supposed to be passed a string that is known
6102 to be a valid IP address. However, in the case of IPv6 addresses, it was
6103 not checking this. This is a hostage to fortune. Exim now panics and dies
6104 if the condition is not met. A case was found where this could be provoked
6105 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6106 components; fortuitously, this particular loophole had already been fixed
6107 by change 4.50/55 above.
6109 If there are any other similar loopholes, the new check in host_aton()
6110 itself should stop them being exploited. The report I received stated that
6111 data on the command line could provoke the exploit when Exim was running as
6112 exim, but did not say which command line option was involved. All I could
6113 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6114 running as the user.
6117 61. There was a buffer overflow vulnerability in the SPA authentication code
6118 (which came originally from the Samba project). I have added a test to the
6119 spa_base64_to_bits() function which I hope fixes it.
6122 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6123 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6125 63. The daemon start-up calls getloadavg() while still root for those OS that
6126 need the first call to be done as root, but it missed one case: when
6127 deliver_queue_load_max is set with deliver_drop_privilege. This is
6128 necessary for the benefit of the queue runner, because there is no re-exec
6129 when deliver_drop_privilege is set.
6131 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6132 This has been fixed.
6134 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6135 was in use, was not putting the data itself into the right store pool;
6136 consequently, it could be overwritten for a subsequent message in the same
6137 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6140 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6142 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6143 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6144 the function were treating the return as a boolean value, which happened to
6145 work because 0=false and not-0=true, but is not correct code.
6147 68. The host_aton() function was not handling scoped IPv6 addresses (those
6148 with, for example, "%eth0" on the end) correctly.
6150 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6151 negated items (that is, ~something) in unsigned ints. Some compilers
6152 apparently mutter when there is no cast.
6154 70. If an address verification called from an ACL failed, and did not produce a
6155 user-specific message (i.e. there was only a "system" message), nothing was
6156 put in $acl_verify_message. In this situation, it now puts the system
6159 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6160 session; change 4.31/43 added the unwanted input to the log line - except
6161 that it did not do this in the start of session case. It now does.
6163 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6164 This is wrong and can cause the other end to generate a synchronization
6165 error if it is another Exim or anything else that does the synchronization
6166 check. A QUIT command is no longer sent after a timeout.
6168 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6169 during host lookups.
6171 74. The defer_ok option of callout verification was not working if it was used
6172 when verifying addresses in header lines, that is, for this case:
6174 verify = header_sender/callout=defer_ok
6176 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6177 those file descriptors could be used for SMTP connections. If anything
6178 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6179 could be sent to the SMTP client, causing chaos. The daemon now opens
6180 stdin, stdout, and stderr to /dev/null when it puts itself into the
6183 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6184 log by default. The user can override this with suitable Perl magic.
6186 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6187 the log message when discard triggers, was not working for the DATA ACL or
6188 for the non-SMTP ACL.
6190 78. Error message wording change in sieve.c.
6192 79. If smtp_accept_max_per_host was set, the number of connections could be
6193 restricted to fewer than expected, because the daemon was trying to set up
6194 a new connection before checking whether the processes handling previous
6195 connections had finished. The check for completed processes is now done
6196 earlier. On busy systems, this bug wouldn't be noticed because something
6197 else would have woken the daemon, and it would have reaped the completed
6200 80. If a message was submitted locally by a user whose login name contained one
6201 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6202 It caused a spool format error. I have fixed the spool reading code. A
6203 related problem was that the "from" clause in the Received: line became
6204 illegal because of the space(s). It is now covered by ${quote_local_part.
6206 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6209 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6211 83. Patch from Sieve maintainer to fix unterminated string problem in
6212 "vacation" handling.
6214 84. Some minor changes to the Linux configuration files to help with other
6215 OS variants using glibc.
6217 85. One more patch for Sieve to update vacation handling to latest spec.
6220 ----------------------------------------------------
6221 See the note above about the 4.44 and 4.50 releases.
6222 ----------------------------------------------------
6228 1. Change 4.43/35 introduced a bug that caused file counts to be
6229 incorrectly computed when quota_filecount was set in an appendfile
6232 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6233 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6236 3. Give more explanation in the error message when the command for a transport
6237 filter fails to execute.
6239 4. There are several places where Exim runs a non-Exim command in a
6240 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6241 was being done only for the command run by the queryprogram router. It is
6242 now done for all such subprocesses. The other cases are: ${run, transport
6243 filters, and the commands run by the lmtp and pipe transports.
6245 5. Some older OS have a limit of 256 on the maximum number of file
6246 descriptors. Exim was using setrlimit() to set 1000 as a large value
6247 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6248 systems. I've change it so that if it can't get 1000, it tries for 256.
6250 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6251 was an oversight, and furthermore, ever since the addition of extra
6252 controls (e.g. 4.43/32), the checks on when to allow different forms of
6253 "control" were broken. There should now be diagnostics for all cases when a
6254 control that does not make sense is encountered.
6256 7. $recipients is now available in the predata ACL (oversight).
6258 8. Tidy the search cache before the fork to do a delivery from a message
6259 received from the command line. Otherwise the child will trigger a lookup
6260 failure and thereby defer the delivery if it tries to use (for example) a
6261 cached ldap connection that the parent has called unbind on.
6263 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6264 of $address_data from the recipient verification was clobbered by the
6265 sender verification.
6267 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6268 was its contents. (It was OK if the option was not defined at all.)
6270 11. A "Completed" log line is now written for messages that are removed from
6271 the spool by the -Mrm option.
6273 12. $host_address is now set to the target address during the checking of
6274 ignore_target_hosts.
6276 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6277 being passed; this would have caused $sender_host_name to have been used if
6278 matching the list had actually called for a host name (not very likely,
6279 since this list is usually IP addresses). A host name is now passed as
6282 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6283 code that specifies a non-restarting handler (typically sigaction() in
6284 modern systems) in an attempt to fix a rare and obscure crash bug.
6286 15. Narrowed the window for a race in the daemon that could cause it to ignore
6287 SIGCHLD signals. This is not a major problem, because they are used only to
6288 wake it up if nothing else does.
6290 16. A malformed maildirsize file could cause Exim to calculate negative values
6291 for the mailbox size or file count. Odd effects could occur as a result.
6292 The maildirsize information is now recalculated if the size or filecount
6295 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6296 support for a long time. Removed HAVE_SYS_VFS_H.
6298 18. Updated exipick to current release from John Jetmore.
6300 19. Allow an empty sender to be matched against a lookup in an address list.
6301 Previously the only cases considered were a regular expression, or an
6304 20. Exim went into a mad DNS lookup loop when doing a callout where the
6305 host was specified on the transport, if the DNS lookup yielded more than
6308 21. The RFC2047 encoding function was originally intended for short strings
6309 such as real names; it was not keeping to the 75-character limit for
6310 encoded words that the RFC imposes. It now respects the limit, and
6311 generates multiple encoded words if necessary. To be on the safe side, I
6312 have increased the buffer size for the ${rfc2047: expansion operator from
6315 22. Failure to deliver a bounce message always caused it to be frozen, even if
6316 there was an errors_to setting on the router. The errors_to setting is now
6319 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6320 canonical form (fully expanded) before being placed in
6321 $sender_host_address.
6323 24. Updated eximstats to version 1.33
6325 25. Include certificate and key file names in error message when GnuTLS fails
6326 to set them up, because the GnuTLS error message doesn't include the name
6327 of the failing file when there is a problem reading it.
6329 26. Expand error message when OpenSSL has problems setting up cert/key files.
6332 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6333 (this can affect the format of dates).
6335 28. exim_tidydb, when checking for the continued existence of a message for
6336 which it has found a message-specific retry record, was not finding
6337 messages that were in split spool directories. Consequently, it was
6338 deleting retry records that should have stayed in existence.
6340 29. eximstats updated to version 1.35
6341 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6342 1.35 - bugfix such that pie charts by volume are generated correctly
6344 30. The SPA authentication driver was not abandoning authentication and moving
6345 on to the next authenticator when an expansion was forced to fail,
6346 contradicting the general specification for all authenticators. Instead it
6347 was generating a temporary error. It now behaves as specified.
6349 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6350 (the order specifies the preference for clients). The order is now AES256,
6351 AES128, 3DES, ARCFOUR128.
6353 31. Small patch to Sieve code - explicitly set From: when generating an
6356 32. Exim crashed if a remote delivery caused a very long error message to be
6357 recorded - for instance if somebody sent an entire SpamAssassin report back
6358 as a large number of 550 error lines. This bug was coincidentally fixed by
6359 increasing the size of one of Exim's internal buffers (big_buffer) that
6360 happened as part of the Exiscan merge. However, to be on the safe side, I
6361 have made the code more robust (and fixed the comments that describe what
6364 33. Some experimental protocols are using DNS PTR records for new purposes. The
6365 keys for these records are domain names, not reversed IP addresses. The
6366 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6367 leaves it alone. Component reversal etc. now happens only for IP addresses.
6370 34. The host_aton() function is supposed to be passed a string that is known
6371 to be a valid IP address. However, in the case of IPv6 addresses, it was
6372 not checking this. This is a hostage to fortune. Exim now panics and dies
6373 if the condition is not met. A case was found where this could be provoked
6374 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6375 components; fortuitously, this particular loophole had already been fixed
6376 by change 4.50/55 or 4.44/33 above.
6378 If there are any other similar loopholes, the new check in host_aton()
6379 itself should stop them being exploited. The report I received stated that
6380 data on the command line could provoke the exploit when Exim was running as
6381 exim, but did not say which command line option was involved. All I could
6382 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6383 running as the user.
6386 35. There was a buffer overflow vulnerability in the SPA authentication code
6387 (which came originally from the Samba project). I have added a test to the
6388 spa_base64_to_bits() function which I hope fixes it.
6391 36. The daemon start-up calls getloadavg() while still root for those OS that
6392 need the first call to be done as root, but it missed one case: when
6393 deliver_queue_load_max is set with deliver_drop_privilege. This is
6394 necessary for the benefit of the queue runner, because there is no re-exec
6395 when deliver_drop_privilege is set.
6397 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6398 was in use, was not putting the data itself into the right store pool;
6399 consequently, it could be overwritten for a subsequent message in the same
6400 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6403 38. Sometimes the final signoff response after QUIT could fail to get
6404 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6405 < 0 before doing a fflush(). This bug looks as though it goes back to the
6406 introduction of TLS in release 3.20, but "sometimes" must have been rare
6407 because the tests only now provoked it.
6413 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6414 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6415 Now it returns an integer. A number of calls were still expecting a T/F
6416 return. Fortuitously, in all cases, the tests worked in OK situations,
6417 which is the norm. However, things would have gone wrong on any write
6418 failures on the smtp file descriptor. This function is used when sending
6419 messages over SMTP and also when doing verify callouts.
6421 2. When Exim is called to do synchronous delivery of a locally submitted
6422 message (the -odf or -odi options), it no longer closes stderr before doing
6425 3. Implemented the mua_wrapper option.
6427 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6429 5. Implemented the functions header_remove(), header_testname(),
6430 header_add_at_position(), and receive_remove_recipient(), and exported them
6433 6. If an ACL "warn" statement specified the addition of headers, Exim already
6434 inserted X-ACL-Warn: at the start if there was no header name. However, it
6435 was not making this test for the second and subsequent header lines if
6436 there were newlines in the string. This meant that an invalid header could
6437 be inserted if Exim was badly configured.
6439 7. Allow an ACL "warn" statement to add header lines at the start or after all
6440 the Received: headers, as well as at the end.
6442 8. Added the rcpt_4xx retry error code.
6444 9. Added postmaster_mailfrom=xxx to callout verification option.
6446 10. Added mailfrom=xxxx to the callout verification option, for verify=
6449 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6450 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6452 12. Inserted some casts to stop certain compilers warning when using pointer
6453 differences as field lengths or precisions in printf-type calls (mostly
6454 affecting debugging statements).
6456 13. Added optional readline() support for -be (dynamically loaded).
6458 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6459 same clock tick as a message's arrival, so that its received time was the
6460 same as the "first fail" time on the retry record, and that message
6461 remained on the queue past the ultimate address timeout, every queue runner
6462 would try a delivery (because it was past the ultimate address timeout) but
6463 after another failure, the ultimate address timeout, which should have then
6464 bounced the address, did not kick in. This was a "< instead of <=" error;
6465 in most cases the first failure would have been in the next clock tick
6466 after the received time, and all would be well.
6468 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6469 being recognized when the domain list was tested by the match_domain
6470 condition in an expansion string.
6472 16. Added the ${str2b64: operator.
6474 17. Exim was always calling setrlimit() to set a large limit for the number of
6475 processes, without checking whether the existing limit was already
6476 adequate. (It did check for the limit on file descriptors.) Furthermore,
6477 errors from getrlimit() and setrlimit() were being ignored. Now they are
6478 logged to the main and panic logs, but Exim does carry on, to try to do its
6479 job under whatever limits there are.
6481 18. Imported PCRE 5.0.
6483 19. Trivial typo in log message " temporarily refused connection" (the leading
6486 20. If the log selector return_path_on_delivery was set and an address was
6487 redirected to /dev/null, the delivery process crashed because it assumed
6488 that a return path would always be set for a "successful" delivery. In this
6489 case, the whole delivery is bypassed as an optimization, and therefore no
6492 21. Internal re-arrangement: the function for sending a challenge and reading
6493 a response while authentication was assuming a zero-terminated challenge
6494 string. It's now changed to take a pointer and a length, to allow for
6495 binary data in such strings.
6497 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6499 23. Exim was not respecting finduser_retries when seeking the login of the
6500 uid under which it was called; it was always trying 10 times. (The default
6501 setting of finduser_retries is zero.) Also, it was sleeping after the final
6502 failure, which is pointless.
6504 24. Implemented tls_on_connect_ports.
6506 25. Implemented acl_smtp_predata.
6508 26. If the domain in control=submission is set empty, Exim assumes that the
6509 authenticated id is a complete email address when it generates From: or
6510 Sender: header lines.
6512 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6513 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6514 chown and chgrp in /bin and hostname in /usr/bin.
6516 28. Exim was keeping the "process log" file open after each use, just as it
6517 does for the main log. This opens the possibility of it remaining open for
6518 long periods when the USR1 signal hits a daemon. Occasional processlog
6519 errors were reported, that could have been caused by this. Anyway, it seems
6520 much more sensible not to leave this file open at all, so that is what now
6523 29. The long-running daemon process does not normally write to the log once it
6524 has entered its main loop, and it closes the log before doing so. This is
6525 so that log files can straightforwardly be renamed and moved. However,
6526 there are a couple of unusual error situations where the daemon does write
6527 log entries, and I had neglected to close the log afterwards.
6529 30. The text of an SMTP error response that was received during a remote
6530 delivery was being truncated at 512 bytes. This is too short for some of
6531 the long messages that one sometimes sees. I've increased the limit to
6534 31. It is now possible to make retry rules that apply only when a message has a
6535 specific sender, in particular, an empty sender.
6537 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6538 it possible to be selective about when SMTP synchronization is enforced.
6540 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6542 32. Implemented hosts_connection_nolog.
6544 33. Added an ACL for QUIT.
6546 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6549 35. Added mailbox_size and mailbox_filecount to appendfile.
6551 36. Added control = no_multiline_responses to ACLs.
6553 37. There was a bug in the logic of the code that waits for the clock to tick
6554 in the case where the clock went backwards by a substantial amount such
6555 that the microsecond fraction of "now" was more than the microsecond
6556 fraction of "then" (but the whole seconds number was less).
6558 38. Added support for the libradius Radius client library this is found on
6559 FreeBSD (previously only the radiusclient library was supported).
6565 1. When certain lookups returned multiple values in the form name=value, the
6566 quoting of the values was not always being done properly. Specifically:
6567 (a) If the value started with a double quote, but contained no whitespace,
6569 (b) If the value contained whitespace other than a space character (i.e.
6570 tabs or newlines or carriage returns) it was not quoted.
6571 This fix has been applied to the mysql and pgsql lookups by writing a
6572 separate quoting function and calling it from the lookup code. The fix
6573 should probably also be applied to nisplus, ibase and oracle lookups, but
6574 since I cannot test any of those, I have not disturbed their existing code.
6576 2. A hit in the callout cache for a specific address caused a log line with no
6577 reason for rejecting RCPT. Now it says "Previous (cached) callout
6578 verification failure".
6580 3. There was an off-by-one bug in the queryprogram router. An over-long
6581 return line was truncated at 256 instead of 255 characters, thereby
6582 overflowing its buffer with the terminating zero. As well as fixing this, I
6583 have increased the buffer size to 1024 (and made a note to document this).
6585 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6586 when Exim is waiting for an SMTP response from a remote server, Exim
6587 restarts its select() call on the socket, thereby resetting its timeout.
6588 This is not a problem when such interrupts are rare. Somebody set up a cron
6589 job to run exiwhat every 2 minutes, which is less than the normal select()
6590 timeout (5 or 10 minutes). This meant that the select() timeout never
6591 kicked in because it was always reset. I have fixed this by comparing the
6592 time when an interrupt arrives with the time at the start of the first call
6593 to select(). If more time than the timeout has elapsed, the interrupt is
6594 treated as a timeout.
6596 5. Some internal re-factoring in preparation for the addition of Sieve
6597 extensions (by MH). In particular, the "personal" test is moved to a
6598 separate function, and given an option for scanning Cc: and Bcc: (which is
6599 not set for Exim filters).
6601 6. When Exim created an email address using the login of the caller as the
6602 local part (e.g. when creating a From: or Sender: header line), it was not
6603 quoting the local part when it contained special characters such as @.
6605 7. Installed new OpenBSD configuration files.
6607 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6608 try to make them clearer.
6610 9. Callout options, other than the timeout value, were being ignored when
6611 verifying sender addresses in header lines. For example, when using
6613 verify = header_sender/callout=no_cache
6615 the cache was (incorrectly) being used.
6617 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6618 only the Cygwin environment.
6620 11. When return_path_on_delivery was set as a log selector, if different remote
6621 addresses in the same message used different return paths and parallel
6622 remote delivery occurred, the wrong values would sometimes be logged.
6623 (Whenever a remote delivery process finished, the return path value from
6624 the most recently started remote delivery process was logged.)
6626 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6627 lines when AUTH and/or TLS are in use. This is the "received protocol"
6628 field. Exim used to use "asmtp" for authenticated SMTP, without any
6629 indication (in the protocol name) for TLS use. Now it follows the RFC and
6630 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6631 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6632 names appear in log lines as well as in Received: header lines.
6634 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6635 extensions, and comparison tests, and to fix some bugs.
6637 14. Changes to the "personal" filter test:
6639 (1) The test was buggy in that it was just doing the equivalent of
6640 "contains" tests on header lines. For example, if a user's address was
6641 anne@some.where, the "personal" test would incorrectly be true for
6643 To: susanne@some.where
6645 This test is now done by extracting each address from the header in turn,
6646 and checking the entire address. Other tests that are part of "personal"
6647 are now done using regular expressions (for example, to check local parts
6648 of addresses in From: header lines).
6650 (2) The list of non-personal local parts in From: addresses has been
6651 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6652 taken from the Sieve specification recommendations.
6654 (3) If the message contains any header line starting with "List-" it is
6655 treated as non-personal.
6657 (4) The test for "circular" in the Subject: header line has been removed
6658 because it now seems ill-conceived.
6660 15. Minor typos in src/EDITME comments corrected.
6662 16. Installed latest exipick from John Jetmore.
6664 17. If headers_add on a router specified a text string that was too long for
6665 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6666 of string_sprintf() is now avoided.
6668 18. $message_body_size was not set (it was always zero) when running the DATA
6669 ACL and the local_scan() function.
6671 19. For the "mail" command in an Exim filter, no default was being set for
6672 the once_repeat time, causing a random time value to be used if "once" was
6673 specified. (If the value happened to be <= 0, no repeat happened.) The
6674 default is now 0s, meaning "never repeat". The "vacation" command was OK
6675 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6676 (I found it when inspecting the code).
6678 20. There is now an overall timeout for performing a callout verification. It
6679 defaults to 4 times the callout timeout, which applies to individual SMTP
6680 commands during the callout. The overall timeout applies when there is more
6681 than one host that can be tried. The timeout is checked before trying the
6682 next host. This prevents very long delays if there are a large number of
6683 hosts and all are timing out (e.g. when the network connections are timing
6684 out). The value of the overall timeout can be changed by specifying an
6685 additional sub-option for "callout", called "maxwait". For example:
6687 verify = sender/callout=5s,maxwait=20s
6689 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6690 to the end before writing, but this should make it even safer).
6692 22. Exim was forgetting that it had advertised PIPELINING for the second and
6693 subsequent messages on an SMTP connection. It was also not resetting its
6694 memory on STARTTLS and an internal HELO.
6696 23. When Exim logs an SMTP synchronization error within a session, it now
6697 records whether PIPELINING has been advertised or not.
6699 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6700 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6701 rather than long int.
6703 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6705 26. Added the never_mail option to autoreply.
6711 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6712 crash if the getsockname() call failed; this can happen if a connection is
6713 closed very soon after it is established. The problem was simply in the
6714 order in which certain operations were done, causing Exim to try to write
6715 to the SMTP stream before it had set up the file descriptor. The bug has
6716 been fixed by making things happen in the correct order.
6722 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6723 before the connection was closed, thus losing the rejection response.
6725 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6726 some early Solaris releases, but causes trouble in current releases where
6727 socklen_t is defined.
6729 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6732 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6735 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6736 that releasing the top of it at the end releases what was used for sub-
6737 expansions (unless the block got too big). However, discard this block if
6738 the first thing is a variable or header, so that we can use its block when
6739 it is dynamic (useful for very large $message_headers, for example).
6741 6. Lookups now cache *every* query, not just the most recent. A new, separate
6742 store pool is used for this. It can be recovered when all lookup caches are
6743 flushed. Lookups now release memory at the end of their result strings.
6744 This has involved some general refactoring of the lookup sources.
6746 7. Some code has been added to the store_xxx() functions to reduce the amount
6747 of flapping under certain conditions.
6749 8. log_incoming_interface used to affect only the <= reception log lines. Now
6750 it causes the local interface and port to be added to several more SMTP log
6751 lines, for example "SMTP connection from", and rejection lines.
6753 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6755 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6757 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6758 could be overwritten at the end of the current message (or the start of a
6759 new message if it was set in a HELO ACL). The value is now preserved for
6760 the duration of the SMTP connection.
6762 12. If a transport had a headers_rewrite setting, and a matching header line
6763 contained an unqualified address, that address was qualified, even if it
6764 did not match any rewriting rules. The underlying bug was that the values
6765 of the flags that permit the existence of unqualified sender and recipient
6766 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6767 non-local messages, and by -bnq for local messages) were not being
6768 preserved with the message after it was received.
6770 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6771 "next input=" as part of the text comprising the host identity instead of
6772 the correct text. The code was using the same buffer for two different
6773 strings. However, depending on which order the printing function evaluated
6774 its arguments, the bug did not always show up. Under Linux, for example, my
6775 test suite worked just fine.
6777 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6778 doesn't work with some older versions of Perl. It has been changed to "my",
6779 which in any case is probably the better facility to use.
6781 15. A really picky compiler found some instances of statements for creating
6782 error messages that either had too many or two few arguments for the format
6785 16. The size of the buffer for calls to the DNS resolver has been increased
6786 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6787 for addresses that have a lot of PTR records. This alleviates a problem; it
6788 does not fully solve it.
6790 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6791 buffer now truncates the list and logs the incident, which is the same
6792 action as happens when Exim is looking up a host name and its aliases.
6793 Previously in this situation something unpredictable would happen;
6794 sometimes it was "internal error: store_reset failed".
6796 18. If a server dropped the connection unexpectedly when an Exim client was
6797 using GnuTLS and trying to read a response, the client delivery process
6798 crashed while trying to generate an error log message.
6800 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6801 string, for example:
6803 warn message = H1: something\nH2: something
6805 the text was added as a single header line from Exim's point of view
6806 though it ended up OK in the delivered message. However, searching for the
6807 second and subsequent header lines using $h_h2: did not work. This has been
6808 fixed. Similarly, if a system filter added multiple headers in this way,
6809 the routers could not see them.
6811 20. Expanded the error message when iplsearch is called with an invalid key to
6812 suggest using net-iplsearch in a host list.
6814 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6815 ACLs are no longer actually imposed (and a message to that effect is
6818 22. If a "gecos" field in a passwd entry contained escaped characters, in
6819 particular, if it contained a \" sequence, Exim got it wrong when building
6820 a From: or a Sender: header from that name. A second bug also caused
6821 incorrect handling when an unquoted " was present following a character
6822 that needed quoting.
6824 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6825 was not being matched caselessly.
6827 24. Arranged for all hyphens in the exim.8 source to be escaped with
6830 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6831 properly. Recipient callout cache records were still being keyed to include
6832 the sender, even when use_sender was set false. This led to far more
6833 callouts that were necessary. The sender is no longer included in the key
6834 when use_sender is false.
6836 26. Added "control = submission" modifier to ACLs.
6838 27. Added the ${base62d: operator to decode base 62 numbers.
6840 28. dnsdb lookups can now access SRV records.
6842 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6843 the configuration file.
6845 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6846 (-v) mode. This makes the output for a verbose queue run more intelligible.
6848 31. Added a use_postmaster feature to recipient callouts.
6850 32. Added the $body_zerocount variable, containing the number of binary zero
6851 bytes in the message body.
6853 33. The time of last modification of the "new" subdirectory is now used as the
6854 "mailbox time last read" when there is a quota error for a maildir
6857 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6859 35. Added +ignore_unknown as a special item in host lists.
6861 36. Code for decoding IPv6 addresses in host lists is now included, even if
6862 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6863 address was recognized as an IP address, but was then not correctly decoded
6864 into binary, causing unexpected and incorrect effects when compared with
6871 1. Very minor rewording of debugging text in manualroute to say "list of
6872 hosts" instead of "hostlist".
6874 2. If verify=header_syntax was set, and a header line with an unqualified
6875 address (no domain) and a large number of spaces between the end of the
6876 name and the colon was received, the reception process suffered a buffer
6877 overflow, and (when I tested it) crashed. This was caused by some obsolete
6878 code that should have been removed. The fix is to remove it!
6880 3. When running in the test harness, delay a bit after writing a bounce
6881 message to get a bit more predictability in the log output.
6883 4. Added a call to search_tidyup() just before forking a reception process. In
6884 theory, someone could use a lookup in the expansion of smtp_accept_max_
6885 per_host which, without the tidyup, could leave open a database connection.
6887 5. Added the variables $recipient_data and $sender_data which get set from a
6888 lookup success in an ACL "recipients" or "senders" condition, or a router
6889 "senders" option, similar to $domain_data and $local_part_data.
6891 6. Moved the writing of debug_print from before to after the "senders" test
6894 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6895 problems for message scanning, either using a data ACL, or using
6896 local_scan() because the Received: header was not generated till after they
6897 were called (in order to set the time as the time of reception completion).
6898 I have revised the way this works. The header is now generated after the
6899 body is received, but before the ACL or local_scan() are called. After they
6900 are run, the timestamp in the header is updated.
6906 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6907 before starting a queue runner without re-exec. This happened only when
6908 deliver_drop_privilege was set or when the Exim user was set to root. The
6909 effect of the bug was that timeouts during subsequent deliveries caused
6910 crashes instead of being properly handled. The handler is now left at its
6911 default (and expected) setting.
6913 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6914 message, again when deliver_drop_privilege is set or Exim is run as root.
6915 The bug described in (1) was not present in this case, but the tidying up
6916 of the other signals was missing. I have made the two cases consistent.
6918 3. The ignore_target_hosts setting on a manualroute router was being ignored
6919 for hosts that were looked up using the /MX notation.
6921 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6924 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6925 operated on the sender address. After changing the $sender_address to <>
6926 for the sender address verify, Exim was re-instated it as the original
6927 (before rewriting) address, but remembering that it had rewritten it, so it
6928 wasn't rewriting it again. This bug also had the effect of breaking the
6929 sender address verification caching when the sender address was rewritten.
6931 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6932 This has been changed so that if the ip literal address matches
6933 ignore_target_hosts, the router declines.
6935 7. Added expansion conditions match_domain, match_address, and match_local_
6936 part (NOT match_host).
6938 8. The placeholder for the Received: header didn't have a length field set.
6940 9. Added code to Exim itself and to exim_lock to test for a specific race
6941 condition that could lead to file corruption when using MBX delivery. The
6942 issue is with the lockfile that is created in /tmp. If this file is removed
6943 after a process has opened it but before that process has acquired a lock,
6944 there is the potential for a second process to recreate the file and also
6945 acquire a lock. This could lead to two Exim processes writing to the file
6946 at the same time. The added code performs the same test as UW imapd; it
6947 checks after acquiring the lock that its file descriptor still refers to
6948 the same named file.
6950 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6951 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6954 11. Added the smtp_active_hostname option. If used, this will typically be made
6955 to depend on the incoming interface address. Because $interface_address is
6956 not set up until the daemon has forked a reception process, error responses
6957 that can happen earlier (such as "too many connections") no longer contain
6960 12. If an expansion in a condition on a "warn" statement fails because a lookup
6961 defers, the "warn" statement is abandoned, and the next ACL statement is
6962 processed. Previously this caused the whole ACL to be aborted.
6964 13. Added the iplsearch lookup type.
6966 14. Added ident_timeout as a log selector.
6968 15. Added tls_certificate_verified as a log selector.
6970 16. Added a global option tls_require_ciphers (compare the smtp transport
6971 option of the same name). This controls incoming TLS connections.
6973 17. I finally figured out how to make tls_require_ciphers do a similar thing
6974 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6975 before starting the TLS session.
6977 18. Tabs are now shown as \t in -bP output.
6979 19. If the log selector return_path_on_delivery was set, Exim crashed when
6980 bouncing a message because it had too many Received: header lines.
6982 20. If two routers both had headers_remove settings, and the first one included
6983 a superfluous trailing colon, the final name in the first list and the
6984 first name in the second list were incorrectly joined into one item (with a
6985 colon in the middle).
6991 1. Added -C and -D options to the exinext utility, mainly to make it easier
6992 to include in the automated testing, but these could be helpful when
6993 multiple configurations are in use.
6995 2. The exinext utility was not formatting the output nicely when there was
6996 an alternate port involved in the retry record key, nor when there was a
6997 message id as well (for retries that were specific to a specific message
6998 and a specific host). It was also confused by IPv6 addresses, because of
6999 the additional colons they contain. I have fixed the IPv4 problem, and
7000 patched it up to do a reasonable job for IPv6.
7002 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
7003 delivery, the log line now contains "pipelined" if PIPELINING was used.
7005 4. An SMTP transport process used to panic and die if the bind() call to set
7006 an explicit outgoing interface failed. This has been changed; it is now
7007 treated in the same way as a connect() failure.
7009 5. A reference to $sender_host_name in the part of a conditional expansion
7010 that was being skipped was still causing a DNS lookup. This no longer
7013 6. The def: expansion condition was not recognizing references to header lines
7014 that used bh_ and bheader_.
7016 7. Added the _cache feature to named lists.
7018 8. The code for checking quota_filecount in the appendfile transport was
7019 allowing one more file than it should have been.
7021 9. For compatibility with Sendmail, the command line option
7029 and sets the incoming protocol and host name (for trusted callers). The
7030 host name and its colon can be omitted when only the protocol is to be set.
7031 Note the Exim already has two private options, -pd and -ps, that refer to
7032 embedded Perl. It is therefore impossible to set a protocol value of "d" or
7033 "s", but I don't think that's a major issue.
7035 10. A number of refactoring changes to the code, none of which should affect
7038 (a) The number of logging options was getting close to filling up the
7039 32-bit word that was used as a bit map. I have split them into two classes:
7040 those that are passed in the argument to log_write(), and those that are
7041 only ever tested independently outside of that function. These are now in
7042 separate 32-bit words, so there is plenty of room for expansion again.
7043 There is no change in the user interface or the logging behaviour.
7045 (b) When building, for example, log lines, the code previously used a
7046 macro that called string_cat() twice, in order to add two strings. This is
7047 not really sufficiently general. Furthermore, there was one instance where
7048 it was actually wrong because one of the argument was used twice, and in
7049 one call a function was used. (As it happened, calling the function twice
7050 did not affect the overall behaviour.) The macro has been replaced by a
7051 function that can join an arbitrary number of extra strings onto a growing
7054 (c) The code for expansion conditions now uses a table and a binary chop
7055 instead of a serial search (which was left over from when there were very
7056 few conditions). Also, it now recognizes conditions like "pam" even when
7057 the relevant support is not compiled in: a suitably worded error message is
7058 given if an attempt is made to use such a condition.
7060 11. Added ${time_interval:xxxxx}.
7062 12. A bug was causing one of the ddress fields not to be passed back correctly
7063 from remote delivery subprocesses. The field in question was not being
7064 subsequently used, so this caused to problems in practice.
7066 13. Added new log selectors queue_time and deliver_time.
7068 14. Might have fixed a bug in maildirsizefile handling that threw up
7069 "unexpected character" debug warnings, and recalculated the data
7070 unnecessarily. In any case, I expanded the warning message to give more
7073 15. Added the message "Restricted characters in address" to the statements in
7074 the default ACL that block characters like @ and % in local parts.
7076 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7077 Three changes have been made:
7079 (a) There was a serious bug; a negative response to MAIL caused the whole
7080 recipient domain to be cached as invalid, thereby blocking all messages
7081 to all local parts at the same domain, from all senders. This bug has
7082 been fixed. The domain is no longer cached after a negative response to
7083 MAIL if the sender used is not empty.
7085 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7088 (c) A new callout option, "use_sender" has been added for people who want
7089 the modified behaviour.
7095 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7098 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7099 indeed breaks things for older releases.
7101 3. Added additional logging to the case where there is a problem reading data
7102 from a filter that is running in a subprocess using a pipe, in order to
7103 try to track down a specific problem.
7105 4. Testing facility fudge: when running in the test harness and attempting
7106 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7107 getting "No route to host". Convert this to a timeout.
7109 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7112 6. Some OS don't have socklen_t but use size_t instead. This affects the
7113 fifth argument of getsockopt() amongst other things. This is now
7114 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7115 can be set for individual OS. I have set it for SunOS5, OSF1, and
7116 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7117 some earlier ones do not.
7119 7. Change 4.30/15 was not doing the test caselessly.
7121 8. The standard form for an IPv6 address literal was being rejected by address
7122 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7123 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7124 this, as well as the form without the "IPv6" on the front (but only when
7125 address literals are enabled, of course).
7127 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7129 10. Exim crashed if a message with an empty sender address specified by -f
7130 encountered a router with an errors_to setting. This could be provoked only
7131 by a command such as
7135 where an empty string was supplied; "<>" did not hit this bug.
7137 11. Installed PCRE release 4.5.
7139 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7140 remained set. It is now erased.
7142 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7143 times from message ids (which are base 36 rather than the normal 62).
7145 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7146 were being counted as actual protocol errors, and logged if the log
7147 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7148 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7149 and DATA following a set of rejected RCPTs do not count as protocol errors.
7150 In other words, Exim assumes they were pipelined, though this may not
7151 actually be the case. Of course, in all cases the client gets an
7152 appropriate error code.
7154 15. If a lookup fails in an ACL condition, a message about the failure may
7155 be available; it is used if testing the ACL cannot continue, because most
7156 such messages specify what the cause of the deferral is. However, some
7157 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7158 that caused an old message to be retained and used if a later statement
7159 caused a defer, replacing the real cause of the deferral.
7161 16. If an IP address had so many PTR records that the DNS lookup buffer
7162 was not large enough to hold them, Exim could crash while trying to process
7163 the truncated data. It now detects and logs this case.
7165 17. Further to 4.21/58, another change has been made: if (and only if) the
7166 first line of a message (the first header line) ends with CRLF, a bare LF
7167 in a subsequent header line has a space inserted after it, so as not to
7168 terminate the header.
7170 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7171 unnecessarily, used atoi() instead of strtol(), and didn't check the
7172 termination when getting file sizes from file names by regex.
7174 19. Completely re-implemented the support for maildirsize files, in the light
7175 of a number of problems with the previous contributed implementation
7176 (4.30/29). In particular:
7178 . If the quota is zero, the maildirsize file is maintained, but no quota is
7181 . If the maildir directory does not exist, it is created before any attempt
7182 to write a maildirsize file.
7184 . The quota value in the file is just a cache; if the quota is changed in
7185 the transport, the new value overrides.
7187 . A regular expression is available for excluding directories from the
7190 20. The autoreply transport checks the characters in options that define the
7191 message's headers; it allows continued headers, but it was checking with
7192 isspace() after an embedded newline instead of explicitly looking for a
7195 21. If all the "regular" hosts to which an address was routed had passed their
7196 expiry times, and had not reached their retry times, the address was
7197 bounced, even if fallback hosts were defined. Now Exim should go on to try
7200 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7201 equivalent code in the SMTP transport. Some hosts send humungous responses
7202 to HELO/EHLO, more than 1024 it seems.
7204 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7205 gives compiler warnings in some environments. I've now done it "properly",
7208 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7209 (because of problems with the built-in one) was declared to return uschar *
7210 instead of char *, causing compiler failure.
7212 25. Fixed a file descriptor leak when processing alias/forward files.
7214 26. Fixed a minor format string issue in dbfn.c.
7216 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7218 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7219 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7222 29. When a sender address is verified, it is cached, to save repeating the test
7223 when there is more than one recipient in a message. However, when the
7224 verification involves a callout, it is possible for different callout
7225 options to be set for different recipients. It is too complicated to keep
7226 track of this in the cache, so now Exim always runs a verification when a
7227 callout is required, relying on the callout cache for the optimization.
7228 The overhead is duplication of the address routing, but this should not be
7231 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7232 to be verified with callout=postmaster, and the main callout worked but the
7233 postmaster check failed, the verification correctly failed. However, if a
7234 subsequent RCPT command asked for sender verification *without* the
7235 postmaster check, incorrect caching caused this verification also to fail,
7238 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7239 it was not caching the DNS options (qualify_single, search_parents) that
7240 were used when the lookup failed. A subsequent lookup with different
7241 options therefore always gave the same answer, though there were cases
7242 where it should not have. (Example: a "domains = !$mx_any" option on a
7243 dnslookup router: the "domains" option is always processed without any
7244 widening, but the router might have qualify_single set.) Now Exim uses the
7245 cached value only when the same options are set.
7247 32. Added John Jetmore's "exipick" utility to the distribution.
7249 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7250 than a timeout (e.g. a certificate is required, and is not provided), an
7251 Exim server now closes the connection immediately. Previously it waited for
7252 the client to close - but if the client is SSL, it seems that they each
7253 wait for each other, leading to a delay before one of them times out.
7255 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7256 maintained 0.8.x compatibility because I don't think many are using it, and
7257 it is clearly obsolete.
7259 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7262 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7263 client certificate was expired. A simple patch fixes this, though I don't
7264 understand the full logic of why the verify callback is called multiple
7267 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7268 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7269 which causes problems with some clients (such as the Certicom SSL Plus
7270 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7271 disables the coutermeasure allowing Eudora to connect."
7273 38. Exim was not checking that a write() to a log file succeeded. This could
7274 lead to Bad Things if a log got too big, in particular if it hit a file
7275 size limit. Exim now panics and dies if it cannot write to a log file, just
7276 as it does if it cannot open a log file.
7278 39. Modified OS/Makefile-Linux so that it now contains
7280 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7282 The two -D definitions ensure that Exim is compiled with large file
7283 support, which makes it possible to handle log files that are bigger than
7286 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7287 instance) a domain was checked against a named list that involved a lookup,
7288 causing $domain_data to be set, then another domain was checked against the
7289 same list, then the first domain was re-checked, the value of $domain_data
7290 after the final check could be wrong. In particular, if the second check
7291 failed, it could be set empty. This bug probably also applied to
7294 41. The strip_trailing_dot option was not being applied to the address given
7295 with the -f command-line option.
7297 42. The code for reading a message's header from the spool was incrementing
7298 $received_count, but never initializing it. This meant that the value was
7299 incorrect (doubled) while delivering a message in the same process in which
7300 it was received. In the most common configuration of Exim, this never
7301 happens - a fresh exec is done - but it can happen when
7302 deliver_drop_privilege is set.
7304 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7305 it now includes up to 150 characters of the unexpected data in the log
7308 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7309 and building data strings. The size of both of these buffers was 10 000
7310 bytes - far larger than anybody would *ever* want, thought I. Needless to
7311 say, somebody hit the limit. I have increased the maximum line length to
7312 20 000 and the maximum data length of concatenated lines to 100 000. I have
7313 also fixed two bugs, because there was no checking on these buffers. Tsk,
7314 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7315 buffer is too small.
7317 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7318 lsearch lookups. Now it does.
7320 46. When parsing a route_list item in a manualroute router, a fixed-length
7321 buffer was used for the list of hosts. I made this 1024 bytes long,
7322 thinking that nobody would ever have a list of hosts that long. Wrong.
7323 Somebody had a whole pile of complicated expansion conditions, and the
7324 string was silently truncated, leading to an expansion error. It turns out
7325 that it is easier to change to an unlimited length (owing to other changes
7326 that have happened since this code was originally written) than to build
7327 structure for giving a limitation error. The length of the item that
7328 expands into the list of hosts is now unlimited.
7330 47. The lsearch lookup could not handle data where the length of text line was
7331 more than 4095 characters. Such lines were truncated, leading to shortened
7332 data being returned. It should now handle lines of any length.
7334 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7335 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7338 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7339 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7340 no longer happens in comment lines. A list of replacements is now placed
7341 at the head of all of the source files, except those whose only change is
7342 to replace PERL_COMMAND in the very first #! line.
7344 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7345 messages on the queue, with a bottom-up merge sort, using code contributed
7346 by Michael Haardt. This should make operations like -bp somewhat faster on
7347 large queues. It won't affect queue runners, except when queue_run_in_order
7350 51. Installed eximstats 1.31 in the distribution.
7352 52. Added support for SRV lookups to the dnslookup router.
7354 53. If an ACL referred to $message_body or $message_body_end, the value was not
7355 reset for any messages that followed in the same SMTP session.
7357 54. The store-handling optimization for building very long strings was not
7358 differentiating between the different store pools. I don't think this
7359 actually made any difference in practice, but I've tidied it.
7361 55. While running the routers to verify a sender address, $sender_address
7362 was still set to the sender address. This is wrong, because when routing to
7363 send a bounce to the sender, it would be empty. Therefore, I have changed
7364 it so that, while verifying a sender address, $sender_address is set to <>.
7365 (There is no change to what happens when verifying a recipient address.)
7367 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7368 target A or AAAA records (if not already returned) without resetting the
7369 qualify_single or search_parents options of the DNS resolver. These are
7370 inappropriate in this case because the targets of MX and SRV records must
7371 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7372 target that, when qualified, matched something in the local domain. These
7373 two options are now turned off when doing these lookups.
7375 57. It seems that at least some releases of Reiserfs (which does not have the
7376 concept of a fixed number of inodes) returns zero and not -1 for the
7377 number of available inodes. This interacted badly with check_spool_inodes,
7378 which assumed that -1 was the "no such thing" setting. What I have done is
7379 to check that the total number of inodes is greater than zero before doing
7380 the test of how many are available.
7382 58. When a "warn" ACL statement has a log_message modifier, the message is
7383 remembered, and not repeated. This is to avoid a lot of repetition when a
7384 message has many recipients that cause the same warning to be written.
7385 However, Exim was preserving the list of already written lines for an
7386 entire SMTP session, which doesn't seem right. The memory is now reset if a
7387 new message is started.
7389 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7390 debugging output unless log_rewrite was also set.
7392 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7393 of (int)(handle) when we know that handle contains (void *)(-1).
7395 61. The Exim daemon panic-logs an error return when it closes the incoming
7396 connection. However "connection reset by peer" seems to be common, and
7397 isn't really an error worthy of noting specially, so that particular error
7400 62. When Exim is trying to find all the local interfaces, it used to panic and
7401 die if the ioctl to get the interface flags failed. However, it seems that
7402 on at least one OS (Solaris 9) it is possible to have an interface that is
7403 included in the list of interfaces, but for which you get a failure error
7404 for this call. This happens when the interface is not "plumbed" into a
7405 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7406 failure of the "get flags" call assumes that the interface is down.
7408 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7409 makes life easier for people who are doing arithmetic on fields extracted
7410 from dates, where you often get leading zeros that should not be
7411 interpreted as octal.
7413 64. Added qualify_domain to the redirect router, to override the global
7416 65. If a pathologically long header line contained very many addresses (the
7417 report of this problem mentioned 10 000) and each of them was rewritten,
7418 Exim could use up a very large amount of memory. (It kept on making new
7419 copies of the header line as it rewrote, and never released the old ones.)
7420 At the expense of a bit more processing, the header rewriting function has
7421 been changed so that it no longer eats memory in this way.
7423 66. The generation of the Received: header has been moved from the time that a
7424 message starts to be received, to the time that it finishes. The timestamp
7425 in the Received: header should now be very close to that of the <= log
7426 line. There are two side-effects of this change:
7428 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7429 logged header lines no longer include the local Received: line, because
7430 it has not yet been created. The same applies to a copy of the message
7431 that is returned to a non-SMTP sender when a message is rejected.
7433 (b) When a filter file is tested using -bf, no additional Received: header
7434 is added to the test message. After some thought, I decided that this
7437 This change does not affect the value of $received_for. It is still set
7438 after address rewriting, but before local_scan() is called.
7440 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7442 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7443 gave an unhelpful panic error message, and a defer error. I have managed to
7444 change this behaviour so that it now rejects any supplied certificate,
7445 which seems right, as the list of acceptable certificates is empty.
7447 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7448 gave an unhelpful defer error. I have not managed to make this reject any
7449 supplied certificates, but the error message it gives is "no certificate
7450 supplied", which is not helpful.
7452 70. exigrep's output now also includes lines that are not associated with any
7453 message, but which match the given pattern. Implemented by a patch from
7454 Martin Sluka, which also tidied up the Perl a bit.
7456 71. Recipient callout verification, like sender verification, was using <> in
7457 the MAIL FROM command. This isn't really the right thing, since the actual
7458 sender may affect whether the remote host accepts the recipient or not. I
7459 have changed it to use the actual sender in the callout; this means that
7460 the cache record is now keyed on a recipient/sender pair, not just the
7461 recipient address. There doesn't seem to be a real danger of callout loops,
7462 since a callout by the remote host to check the sender would use <>.
7463 [SEE ABOVE: changed after hitting problems.]
7465 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7466 temporary errors. However, in the case of such a code being given after
7467 the end of a data transmission (i.e. after ".") Exim was failing to write
7468 a retry record for the message. (Yes, there was some broken host that was
7469 actually sending 8xx at this point.)
7471 73. An unknown lookup type in a host list could cause Exim to panic-die when
7472 the list was checked. (An example that provoked this was putting <; in the
7473 middle of a list instead of at the start.) If this happened during a DATA
7474 ACL check, a -D file could be left lying around. This kind of configuration
7475 error no longer causes Exim to die; instead it causes a defer error. The
7476 incident is still logged to the main and panic logs.
7478 74. Buglet left over from Exim 3 conversion. The message "too many messages
7479 in one connection" was written to the rejectlog but not the mainlog, except
7480 when address rewriting (yes!) was being logged.
7482 75. Added write_rejectlog option.
7484 76. When a system filter was run not as root (that is, when system_filter_user
7485 was set), the values of the $n variables were not being returned to the
7486 main process; thus, they were not subsequently available in the $sn
7489 77. Added +return_path_on_delivery log selector.
7491 78. A connection timeout was being treated differently from recipients deferred
7492 when testing hosts_max_try with a message that was older than the host's
7493 retry timeout. (The host should not be counted, thus allowing all hosts to
7494 be tried at least once before bouncing.) This may have been the cause of an
7495 occasionally reported bug whereby a message would remain on the queue
7496 longer than the retry timeout, but would be bounced if a delivery was
7497 forced. I say "may" because I never totally pinned down the problem;
7498 setting up timeout/retry tests is difficult. See also the next item.
7500 79. The ultimate address timeout was not being applied to errors that involved
7501 a combination of host plus message (for example, a timeout on a MAIL
7502 command). When an address resolved to a number of possible hosts, and they
7503 were not all tried for each delivery (e.g. because of hosts_max_try), a
7504 message could remain on the queue longer than the retry timeout.
7506 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7509 81. Fixed an obscure SMTP outgoing bug which required at least the following
7510 conditions: (a) there was another message waiting for the same server;
7511 (b) the server returned 5xx to all RCPT commands in the first message so
7512 that the message was not completed; (c) the server dropped the connection
7513 or gave a negative response to the RSET that Exim sends to abort the
7514 transaction. The observed case was a dropped connection after DATA that had
7515 been sent in pipelining mode. That is, the server had advertised PIPELINING
7516 but was not implementing it correctly. The effect of the bug was incorrect
7517 behaviour, such as trying another host, and this could lead to a crash.
7523 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7524 and daemon.c were passed as pointers to ints; they should have been
7525 pointers to socklen_t variables (which are typically unsigned ints).
7527 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7530 3. Fixed a really odd bug that affected only the testing scheme; patching a
7531 certain fixed string in the binary changed the value of another string that
7532 happened to be identical to the end of the original first string.
7534 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7535 name", it returns that address as the IP address. On some operating
7536 systems (e.g. Solaris), it also passes back the IP address string as the
7537 "host name". However, on others (e.g. Linux), it passes back an empty
7538 string. Exim wasn't checking for this, and was changing the host name to an
7539 empty string, assuming it had been canonicalized.
7541 5. Although rare, it is permitted to have more than one PTR record for a given
7542 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7543 all the names associated with an address, because they do in Solaris.
7544 However, it seems that they do not in Linux for data that comes from the
7545 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7546 I found this out when I moved to a new Linux workstation and tried to run
7547 the Exim test suite.
7549 To get round this problem I have changed the code so that it now does its
7550 own call to the DNS to look up PTR records when searching for a host name.
7551 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7552 addresses that are only in /etc/hosts are still found.
7554 This behaviour is, however, controlled by an option called host_lookup_
7555 order, which defaults to "bydns:byaddr". If people want to use the other
7556 order, or indeed, just use one or the other means of lookup, they can
7557 specify it in this variable.
7559 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7560 some operating systems, this comes back from gethostbyaddr() as an empty
7561 string, and this is what Exim used to test for. However, it seems that in
7562 other systems, "." is yielded. Exim now tests for this case too.
7564 7. The values of check_spool_space and check_log_space are now held internally
7565 as a number of kilobytes instead of an absolute number of bytes. If a
7566 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7567 kilobyte. This means that much larger values can be stored.
7569 8. Exim monitor: an attempt to get the action menu when not actually pointing
7570 at a message produces an empty menu entitled "No message selected". This
7571 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7572 no entries in it ("Shell widget menu has zero width and/or height"). So I
7573 have added a single, blank menu entry in this case.
7575 9. Added ${quote_local_part.
7577 10. MIME decoding is now applied to the contents of Subject: header lines when
7580 11. Now that a reference to $sender_host_address automatically causes a reverse
7581 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7582 host lookup before query-style lookups in lists that might use this
7583 variable. This has therefore been abolished, and the "net-" prefix is no
7584 longer necessary for query-style lookups.
7586 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7587 have been a typo for LFLAGS, so it has been changed.
7589 13. The install script calls Exim with "-C /dev/null" in order to find the
7590 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7591 to be output. However, since Exim outputs its version number before the
7592 error, it didn't break the script. It just looked ugly. I fixed this by
7593 always allowing "-C /dev/null" if the caller is root.
7595 14. Ignore overlarge ACL variable number when reading spool file - insurance
7596 against a later release with more variables having written the file.
7598 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7599 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7600 this, as well as the form without the "IPv6" on the front.
7602 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7603 OS/Makefile-Darwin file.
7605 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7606 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7608 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7609 variable. However, some OS use ints for inodes. I've added cast to long int
7610 to get rid of the compiler warning.
7612 19. I had forgotten to lock out "/../" in configuration file names when
7613 ALT_CONFIG_PREFIX was set.
7615 20. Routers used for verification do not need to specify transports. However,
7616 if such a router generated a host list, and callout was configured, Exim
7617 crashed, because it could not find a port number from the (non-existent)
7618 transport. It now assumes port 25 in this circumstance.
7620 21. Added the -t option to exigrep.
7622 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7623 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7624 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7625 them is set, LOOKUP_LSEARCH is forced.
7627 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7629 24. Added sender and host information to the "rejected by local_scan()" log
7630 line; previously there was no indication of these.
7632 25. Added .include_if_exists.
7634 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7635 Linux. It turns out that not all file systems support this. Apparently some
7636 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7637 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7638 not supported on the file descriptor, is now ignored when Exim is trying to
7639 sync a directory. This applies only to Linux.
7641 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7643 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7644 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7647 29. Added support for maildirsize files from supplied patch (modified a bit).
7649 30. The use of :fail: followed by an empty string could lead Exim to respond to
7650 sender verification failures with (e.g.):
7652 550 Verification failed for <xxx>
7653 550 Sender verify failed
7655 where the first response line was missing the '-' that indicates it is not
7656 the final line of the response.
7658 31. The loop for finding the name of the user that called Exim had a hardwired
7659 limit of 10; it now uses the value of finduser_retries, which is used for
7660 all other user lookups.
7662 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7665 33. Exim was neglecting to zero errno before one call of strtol() when
7666 expanding a string and expecting an integer value. On some systems this
7667 resulted in spurious "integer overflow" errors. Also, it was casting the
7668 result into an int without checking.
7670 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7671 did not work. The code looks as if it has *never* worked, though it appears
7672 to have been documented since at least release 1.62. I have made it work.
7674 35. The "timeout_DNS" error in retry rules, also documented since at least
7675 1.62, also never worked. As it isn't clear exactly what this means, and
7676 clearly it isn't a major issue, I have abolished the feature by treating it
7677 as "timeout", and writing a warning to the main and panic logs.
7679 36. The display of retry rules for -brt wasn't always showing the error code
7682 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7683 timeout_connect_A, timeout_connect_MX.
7685 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7686 to the empty sender.
7688 39. The daemon was not analysing the content of -oX till after it had closed
7689 stderr and disconnected from the controlling terminal. This meant that any
7690 syntax errors were only noted on the panic log, and the return code from
7691 the command was 0. By re-arranging the code a little, I've made the
7692 decoding happen first, so such errors now appear on stderr, and the return
7693 code is 1. However, the actual setting up of the sockets still happens in
7694 the disconnected process, so errors there are still only recorded on the
7697 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7698 connections (as happens on some IP stacks) was logged at start up time as
7699 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7700 it from "IPv6 and IPv4", which means that two separate sockets are being
7703 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7704 says whether AF_INET or AF_INET6 was passed as an argument.
7706 42. Exiwhat output was messed up when time zones were included in log
7709 43. Exiwhat now gives more information about the daemon's listening ports,
7710 and whether -tls-on-connect was used.
7712 44. The "port" option of the smtp transport is now expanded.
7714 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7715 silently ignored. Now an error message is written to the main and panic
7718 46. There's a new ACL modifier called "logwrite" which writes to a log file
7719 as soon as it is encountered.
7721 47. Added $local_user_uid and $local_user_gid at routing time.
7723 48. Exim crashed when trying to verify a sender address that was being
7726 49. Exim was recognizing only a space character after ".include". It now also
7727 recognizes a tab character.
7729 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7730 extracting the relevant information from the specification. The man page no
7731 longer contains scrambled data for the -d option, and I've added a section
7732 at the front about calling Exim under different names.
7734 51. Added "extra_headers" argument to the "mail" command in filter files.
7736 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7739 53. Installed eximstats 1.29.
7741 54. Added transport_filter_timeout as a generic transport option.
7743 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7744 Cc: header lines. This was required by RFC 822, but it not required by RFC
7747 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7748 incoming messages that did not have them. Now it does so only if the
7749 message originates locally, that is, if there is no associated remote host
7750 address. When Resent- header lines are present, this applies to the Resent-
7751 lines rather than the non-Resent- lines.
7753 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7754 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7756 58. Messages for configuration errors now include the name of the main
7757 configuration file - useful now that there may be more than one file in a
7758 list (.included file names were always shown).
7760 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7761 for those rare installations that do not start the daemon as root or run it
7762 setuid root. I've cut out the call to initgroups() if the daemon is not
7765 60. The Exim user and group can now be bound into the binary as text strings
7766 that are looked up at the start of Exim's processing.
7768 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7770 62. Added $mailstore_basename variable.
7772 63. Installed patch to sieve.c from Michael Haardt.
7774 64. When Exim failed to open the panic log after failing to open the main log,
7775 the original message it was trying to log was written to stderr and debug
7776 output, but if they were not available (the usual case in production), it
7777 was lost. Now it is written to syslog before the two lines that record the
7778 failures to open the logs.
7780 65. Users' Exim filters run in subprocesses under the user's uid. It is
7781 possible for a "deliver" command or an alias in a "personal" command to
7782 provoke an address rewrite. If logging of address rewriting is configured,
7783 this fails because the process is not running as root or exim. There may be
7784 a better way of dealing with this, but for the moment (because 4.30 needs
7785 to be released), I have disabled address rewrite logging when running a
7786 filter in a non-root, non-exim process.
7792 1. The buildconfig auxiliary program wasn't quoting the value set for
7793 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7794 not defined. This bug was masked in 4.22 by the effect that was fixed in
7797 2. Some messages that were rejected after a message id was allocated were
7798 shown as "incomplete" by exigrep. It no longer does this for messages that
7799 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7801 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7802 have allow_domain_literals set, the ID did not get logged in the <= line.
7803 Domain literals are now always recognized in Message-ID: header lines.
7805 4. The first argument for a ${extract expansion item is the key name or field
7806 number. Leading and trailing spaces in this item were not being ignored,
7807 causing some misleading effects.
7809 5. When deliver_drop_privilege was set, single queue runner processes started
7810 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7811 same command in the process it spins off) were not dropping privilege.
7813 6. When the daemon running as "exim" started a queue runner, it always
7814 re-executed Exim in the spun-off process. This is a waste of effort when
7815 deliver_drop_privilege is set. The new process now just calls the
7816 queue-runner function directly.
7822 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7825 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7826 ignored. Though the use of -oP was forcing the writing of a pid file, it
7827 was always written to the default place.
7829 3. If the message "no IP address found for host xxxx" is generated during
7830 incoming verification, it is now followed by identification of the incoming
7831 connection (so you can more easily find what provoked it).
7833 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7835 5. Added some features to "harden" Exim a bit more against certain attacks:
7837 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7838 be put in Local/Makefile. This is like the never_users runtime option,
7839 but it cannot be overridden. The default setting is "root".
7841 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7842 prefix string with which any file named in a -C command line option
7845 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7846 is retained for -C and -D only if the caller of Exim is root. Without
7847 it, the exim user may also use -C and -D and retain privilege.
7849 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7850 command line option is disabled.
7852 6. Macro names set by the -D option must start with an upper case letter, just
7853 like macro names defined in the configuration file.
7855 7. Added "dereference=" facility to LDAP.
7857 8. Two instances of the typo "uknown" in the source files are fixed.
7859 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7860 the Configure-Makefile script screwed up while processing it.
7862 10. Incorporated PCRE 4.4.
7864 11. The SMTP synchronization check was not operating right at the start of an
7865 SMTP session. For example, it could not catch a HELO sent before the client
7866 waited for the greeting. There is now a check for outstanding input at the
7867 point when the greeting is written. Because of the duplex, asynchronous
7868 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7869 way, but not yet received, when the check is performed.
7871 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7872 on TCP/IP sockets, because this apparently causes some broken clients to
7875 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7876 unchanged) from the Cygwin maintainer.
7878 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7879 was supported instead of testing for mbx. Effectively a typo.
7881 15. The spa authenticator server code was not checking that the input it
7882 received was valid base64.
7884 16. The debug output line for the "set" modifier in ACLs was not showing the
7885 name of the variable that was being set.
7887 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7889 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7890 lookup on its own. Something else was needed to trigger the lookup. For
7891 example, a match in host_lookup or the need for a host name in a host list.
7892 Now, if $sender_host_name is referenced and the host name has not yet been
7893 looked up, a lookup is performed. If the lookup fails, the variable remains
7894 empty, and $host_lookup_failed is set to "1".
7896 19. Added "eqi" as a case-independent comparison operator.
7898 20. The saslauthd authentication condition could segfault if neither service
7899 nor realm was specified.
7901 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7902 error message that was logged was misleading, and incoming SMTP
7903 connections were dropped. The message is now more accurate, and temporary
7904 errors are given to SMTP connections.
7906 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7907 (except RSET) with a 421 error, until QUIT is received. However, it was
7908 failing to send a response to QUIT.
7910 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7911 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7912 ACL is now run after the helo_try_verify_hosts code.
7914 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7915 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7916 case-independent, so other case variants are also recognized). Apparently
7917 some systems use these upper case variants.
7919 25. If more than two messages were waiting for the same host, and a transport
7920 filter was specified for the transport, Exim sent two messages over the
7921 same TCP/IP connection, and then failed with "socket operation on non-
7922 socket" when it tried to send the third.
7924 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7926 27. The extern definition of crypt16() in expand.c was not being excluded when
7927 the OS had its own crypt16() function.
7929 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7930 as a preferred synonym for return_size_limit, both as an option and as an
7933 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7935 30. Changed the default configuration ACL to relax the local part checking rule
7936 for addresses that are not in any local domains. For these addresses,
7937 slashes and pipe symbols are allowed within local parts, but the sequence
7938 /../ is explicitly forbidden.
7940 31. SPA server authentication was not clearing the challenge buffer before
7943 32. log_message in a "warn" ACL statement was writing to the reject log as
7944 well as to the main log, which contradicts the documentation and doesn't
7945 seem right (because no rejection is happening). So I have stopped it.
7947 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7948 However, I am unable to do any testing of this.
7950 34. Fixed an infelicity in the appendfile transport. When checking directories
7951 for a mailbox, to see if any needed to be created, it was accidentally
7952 using path names with one or more superfluous leading slashes; tracing
7953 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7955 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7956 contents are added to the log line that is written for every discarded
7957 recipient. (Previously a log_message setting was ignored.)
7959 36. The ${quote: operator now quotes the string if it is empty.
7961 37. The install script runs exim in order to find its version number. If for
7962 some reason other than non-existence or emptiness, which it checks, it
7963 could not run './exim', it was installing it with an empty version number,
7964 i.e. as "exim-". This error state is now caught, and the installation is
7967 38. An argument was missing from the function that creates an error message
7968 when Exim fails to connect to the socket for saslauthd authentication.
7969 This could cause Exim to crash, or give a corrupted message.
7971 39. Added isip, isip4, and isip6 to ${if conditions.
7973 40. The ACL variables $acl_xx are now saved with the message, and can be
7974 accessed later in routers, transports, and filters.
7976 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7977 strings in the file are not string-expanded.
7979 42. If a MAIL command specified a SIZE value that was too large to fit into an
7980 int variable, the check against message_size_limit failed. Such values are
7981 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7982 day this will have to be increased, but I don't think I want to be around
7983 when emails are that large.
7990 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7991 iconv() is not standard in FreeBSD.
7993 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7994 IPv6 enabled. The observed symptom was a segmentation fault on return from
7995 the function os_common_find_running_interfaces() in src/os.c.
7997 3. In the check_special_case() function in daemon.c I had used "errno" as an
7998 argument name, which causes warnings on some systems. This was basically a
7999 typo, since it was named "eno" in the comments!
8001 4. The code that waits for the clock to tick (at a resolution of some fraction
8002 of a second) so as to ensure message-id uniqueness was always waiting for
8003 at least one whole tick, when it could have waited for less. [This is
8004 almost certainly not relevant at current processor speeds, where it is
8005 unlikely to ever wait at all. But we try to future-proof.]
8007 5. The function that sleeps for a time interval that includes fractions of a
8008 second contained a race. It did not block SIGALRM between setting the
8009 timer, and suspending (a couple of lines later). If the interval was short
8010 and the sigsuspend() was delayed until after it had expired, the suspension
8011 never ended. On busy systems this could lead to processes getting stuck for
8014 6. Some uncommon configurations may cause a lookup to happen in a queue runner
8015 process, before it forks any delivery processes. The open lookup caching
8016 mechanism meant that the open file or database connection was passed into
8017 the delivery process. The problem was that delivery processes always tidy
8018 up cached lookup data. This could cause a problem for the next delivery
8019 process started by the queue runner, because the external queue runner
8020 process does not know about the closure. So the next delivery process
8021 still has data in the lookup cache. In the case of a file lookup, there was
8022 no problem because closing a file descriptor in a subprocess doesn't affect
8023 the parent. However, if the lookup was caching a connection to a database,
8024 the connection was closed, and the second delivery process was likely to
8025 see errors such as "PGSQL: query failed: server closed the connection
8026 unexpectedly". The problem has been fixed by closing all cached lookups
8027 in a queue runner before running a delivery process.
8029 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
8030 seem to have the "const" qualifier which it has on other OS. I've
8033 8. Change 4.21/2 was too strict. It is only if there are two authenticators
8034 *of the same type* (client or server) with the same public name that an
8035 error should be diagnosed.
8037 9. When Exim looked up a host name for an IP address, but failed to find the
8038 original IP address when looking up the host name (a safety check), it
8039 output the message "<ip address> does not match any IP for NULL", which was
8040 confusing, to say the least. The bug was that the host name should have
8041 appeared instead of "NULL".
8043 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
8044 user that is built into the binary, and the -C or -D options is used, root
8045 privilege is dropped before the configuration file is read. In addition,
8046 logging is switched to stderr instead of the normal log files. If the
8047 configuration then re-defines the Exim user, the unprivileged environment
8048 is probably not what is expected, so Exim logs a panic warning message (but
8051 However, if deliver_drop_privilege is set, the unprivileged state may well
8052 be exactly what is intended, so the warning has been cut out in that case,
8053 and Exim is allowed to try to write to its normal log files.
8059 1. smtp_return_error_details was not giving details for temporary sender
8060 or receiver verification errors.
8062 2. Diagnose a configuration error if two authenticators have the same public
8065 3. Exim used not to create the message log file for a message until the first
8066 delivery attempt. This could be confusing when incoming messages were held
8067 for policy or load reasons. The message log file is now created at the time
8068 the message is received, and an initial "Received" line is written to it.
8070 4. The automatically generated man page for command line options had a minor
8071 bug that caused no ill effects; however, a more serious problem was that
8072 the procedure for building the man page automatically didn't always
8073 operate. Consequently, release 4.20 contains an out-of-date version. This
8074 shouldn't happen again.
8076 5. When building Exim with embedded Perl support, the script that builds the
8077 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8078 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8080 6. The freeze_tell option was not being used for messages that were frozen on
8081 arrival, either by an ACL or by local_scan().
8083 7. Added the smtp_incomplete_transaction log selector.
8085 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8086 was accepting AUTH without a new EHLO.
8088 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8089 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8092 10. Logging of TCP/IP connections (when configured) now happens in the main
8093 daemon process instead of the child process, so that the TCP/IP connection
8094 count is more accurate (but it can never be perfect).
8096 11. The use of "drop" in a nested ACL was not being handled correctly in the
8097 outer ACL. Now, if condition failure induced by the nested "drop" causes
8098 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8099 or "require"), the connection is dropped.
8101 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8102 that yield "discard" can now be used with an "accept" or a "discard" verb,
8103 but an error is generated for any others (because I can't see a useful way
8104 to define what should happen).
8106 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8107 are now processed in the same way as lines in the Exim configuration file.
8108 In particular, continuation lines are supported.
8110 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8112 15. Added -ti meaning -t -i.
8114 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8115 domains, and warn by logging if others are found.
8117 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8118 returned from GIFCONF when Exim is trying to find the list of interfaces on
8119 a host. The code in os.c has been modified to copy each ifreq to an aligned
8120 structure in all cases.
8122 Also, in some cases, the returned ifreq's were being copied to a 'struct
8123 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8124 means the last couple of bytes of an IPv6 address could be chopped if the
8125 ifreq contained only a normal sockaddr (14 bytes storage).
8127 18. Named domain lists were not supported in the hosts_treat_as_local option.
8128 An entry such as +xxxx was not recognized, and was treated as a literal
8131 19. Ensure that header lines added by a DATA ACL are included in the reject log
8132 if the ACL subsequently rejects the message.
8134 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8135 MD5 (which is deprecated).
8137 21. When testing a filter file using -bf, Exim was writing a message when it
8138 took the sender from a "From " line in the message, but it was not doing so
8139 when it took $return_path from a Return-Path: header line. It now does.
8141 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8142 with a valid header line field name (a series of printing characters
8143 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8145 23. Changed "disc" in the source to "disk" to conform to the documentation and
8146 the book and for uniformity.
8148 24. Ignore Sendmail's -Ooption=value command line item.
8150 25. When execve() failed while trying to run a command in a pipe transport,
8151 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8152 could be confused with a return value of 69 from the command itself. This
8153 has been changed to 127, the value the shell returns if it is asked to run
8154 a non-existent command. The wording for the related log line suggests a
8155 non-existent command as the problem.
8157 26. If received_header_text expands to an empty string, do not add a Received:
8158 header line to the message. (Well, it adds a token one on the spool, but
8159 marks it "old" so that it doesn't get used or transmitted.)
8161 27. Installed eximstats 1.28 (addition of -nt option).
8163 28. There was no check for failure on the call to getsockname() in the daemon
8164 code. This can fail if there is a shortage of resources on the system, with
8165 ENOMEM, for example. A temporary error is now given on failure.
8167 29. Contrary to the C standard, it seems that in some environments, the
8168 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8169 program. Exim now does this explicitly; it affects the formatting of
8170 timestamps using strftime().
8172 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8173 complaints. I've now initialized all the variables, to avoid this.
8175 32. Header lines added by a system filter were not being "seen" during
8176 transport-time rewrites.
8178 33. The info_callback() function passed to OpenSSL is set up with type void
8179 (*)(SSL *, int, int), as described somewhere. However, when calling the
8180 function (actually a macro) that sets it up, the type void(*)() is
8181 expected. I've put in a cast to prevent warnings from picky compilers.
8183 34. If a DNS black list lookup found a CNAME record, but there were no A
8184 records associated with the domain it pointed at, Exim crashed.
8186 35. If a DNS black list lookup returned more than one A record, Exim ignored
8187 all but the first. It now scans all returned addresses if a particular IP
8188 value is being sought. In this situation, the contents of the
8189 $dnslist_value variable are a list of all the addresses, separated by a
8192 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8193 to accept a host name and all its aliases if the forward lookup for any of
8194 them yielded the IP address of the incoming connection. Now it accepts only
8195 those names whose forward lookup yields the correct IP address. Any other
8196 names are discarded. This closes a loophole whereby a rogue DNS
8197 administrator could create reverse DNS records to break through a
8198 wildcarded host restriction in an ACL.
8200 37. If a user filter or a system filter that ran in a subprocess used any of
8201 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8202 the wrong values were passed to the pipe command ($thisaddress had the
8203 value of $0, $0 had the value of $1, etc). This bug was introduced by
8204 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8206 38. Improved the line breaking for long SMTP error messages from ACLs.
8207 Previously, if there was no break point between 40 and 75 characters, Exim
8208 left the rest of the message alone. Two changes have been made: (a) I've
8209 reduced the minimum length to 35 characters; (b) if it can't find a break
8210 point between 35 and 75 characters, it looks ahead and uses the first one
8211 that it finds. This may give the occasional overlong line, but at least the
8212 remaining text gets split now.
8214 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8215 file descriptors might be low, and that setting 1000 would always raise it.
8216 It turns out that in some environments, the limit is already over 1000 and
8217 that lowering it causes trouble. So now Exim takes care not to decrease it.
8219 40. When delivering a message, the value of $return_path is set to $sender_
8220 address at the start of routing (routers may change the value). By an
8221 oversight, this default was not being set up when an address was tested by
8222 -bt or -bv, which affected the outcome if any router or filter referred to
8225 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8226 log only when "message" or "log_message" are set. However, if one of the
8227 conditions was an address verification, or a call to a nested ACL, the
8228 messages generated by the underlying test were being passed through. This
8229 no longer happens. The underlying message is available in $acl_verify_
8230 message for both "message" and "log_message" expansions, so it can be
8231 passed through if needed.
8233 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8234 new expansion $bh_ to give the encoded byte string without charset
8235 translation. Translation happens only if iconv() is available; HAVE_ICONV
8236 indicates this at build time. HEADERS_CHARSET gives the charset to
8237 translate to; headers_charset can change it in the configuration, and
8238 "headers charset" can change it in an individual filter file.
8240 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8241 that creates RFC 2047 encoded "words" labels them as that charset instead
8242 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8243 expansion operator; (ii) when Exim creates a From: line for a local
8244 message; (iii) when a header line is rewritten to include a "phrase" part.
8246 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8247 buggy, causing it to skip the first lines of messages whose message ID
8248 ended in 'D'. This would not have bitten before Exim release 4.14, because
8249 message IDs were unlikely to end in 'D' before then. The effect was to have
8250 incorrect size information for certain domains.
8252 45. #include "config.h" was missing at the start of the crypt16.c module. This
8253 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8256 46. If there was a timeout during a "random" callout check, Exim treated it as
8257 a failure of the random address, and carried on sending RSET and the real
8258 address. If the delay was just some slowness somewhere, the response to the
8259 original RCPT would be taken as a response to RSET and so on, causing
8260 mayhem of various kinds.
8262 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8263 when I implemented it. It didn't allow for the fact that some option values
8264 may legitimately be negative (e.g. size_addition), and it didn't even do
8265 the right test for positive values.
8267 48. Domain names in DNS records are case-independent. Exim always looks them up
8268 in lower case. Some resolvers return domain names in exactly the case they
8269 appear in the zone file, that is, they may contain uppercase letters. Not
8270 all resolvers do this - some return always lower case. Exim was treating a
8271 change of case by a resolver as a change of domain, similar to a widening
8272 of a domain abbreviation. This triggered its re-routing code and so it was
8273 trying to route what was effectively the same domain again. This normally
8274 caused routing to fail (because the router wouldn't handle the domain
8275 twice). Now Exim checks for this case specially, and just changes the
8276 casing of the domain that it ultimately uses when it transmits the message
8279 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8282 50. If a filter generated a file delivery with a non-absolute name (possible if
8283 no home directory exists for the router), the forbid_file option was not
8286 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8287 the existing equality matching.
8289 52. Exim was using ints instead of ino_t variables in some places where it was
8290 dealing with inode numbers.
8292 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8293 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8294 called TMPDIR, and if it finds it is different, it changes its value.
8296 54. The smtp_printf() function is now made available to local_scan() so
8297 additional output lines can be written before returning. There is also an
8298 smtp_fflush() function to enable the detection of a dropped connection.
8299 The variables smtp_input and smtp_batched_input are exported to
8302 55. Changed the default runtime configuration: the message "Unknown user"
8303 has been removed from the ACL, and instead placed on the localuser router,
8304 using the cannot_route_message feature. This means that any verification
8305 failures that generate their own messages won't get overridden. Similarly,
8306 the "Unrouteable address" message that was in the ACL for unverifiable
8307 relay addresses has also been removed.
8309 56. Added hosts_avoid_esmtp to the smtp transport.
8311 57. The exicyclog script was not checking for the esoteric option
8312 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8313 will work only if exicyclog is run under the appropriate euid.
8315 58. Following a discussion on the list, the rules by which Exim recognises line
8316 endings on incoming messages have been changed. The -dropcr and drop_cr
8317 options are now no-ops, retained only for backwards compatibility. The
8318 following line terminators are recognized: LF CRLF CR. However, special
8319 processing applies to CR:
8321 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8322 nor a local message in the state where . is a terminator.
8324 (ii) If a bare CR is encountered in a header line, an extra space is added
8325 after the line terminator so as not to end the header. The reasoning
8326 behind this is that bare CRs in header lines are most likely either
8327 to be mistakes, or people trying to play silly games.
8329 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8330 was being incorrectly given as 18 bytes larger than it should have been.
8331 This is a VOB (very old bug).
8333 60. This may never have affected anything current, but just in case it has:
8334 When the local host is found other than at the start of a list of hosts,
8335 the local host, those with the same MX, and any that follow, are discarded.
8336 When the list in question was part of a longer list of hosts, the following
8337 hosts (not currently being processed) were also being discarded. This no
8338 longer happens. I'm not sure if this situation could ever has previously
8341 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8344 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8345 header. This is something that is recommended in a new Internet Draft, and
8346 is something that is documented as being done by Sendmail. There are two
8347 possible values. For messages generated by the autoreply transport, Exim
8350 Auto-Submitted: auto-replied
8352 whereas for all other generated messages (e.g. bounces) it adds
8354 Auto-Submitted: auto-generated
8356 63. The "personal" condition in filters now includes a test for the
8357 Auto-Submitted: header. If it contains the string "auto-" the message it
8358 not considered personal.
8360 64. Added rcpt_include_affixes as a generic transport option.
8362 65. Added queue_only_override (default true).
8364 66. Added the syslog_duplication option.
8366 67. If what should have been the first header line of a message consisted of
8367 a space followed by a colon, Exim was mis-interpreting it as a header line.
8368 It isn't of course - it is syntactically invalid and should therefore be
8369 treated as the start of the message body. The misbehaviour could have
8370 caused a number of strange effects, including loss of data in subsequent
8371 header lines, and spool format errors.
8373 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8374 client host had authenticated. This control can now be exercised by an ACL
8375 for more flexibility.
8377 69. By default, callouts do not happen when testing with -bh. There is now a
8378 variant, -bhc, which does actually run the callout code, including
8379 consulting and updating the callout cache.
8381 70. Added support for saslauthd authentication, courtesy of Alexander
8384 71. If statvfs() failed on the spool or log directories while checking their
8385 size for availability, Exim confusingly gave the error "space shortage".
8386 Furthermore, in debugging mode it crashed with a floating point exception.
8387 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8388 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8389 serious problem, Exim now writes to the main and panic logs when this
8390 happens, with details of the failure. It then refuses to accept the
8391 incoming message, giving the message "spool directory problem" or "log
8392 directory problem" with a 421 code for SMTP messages.
8394 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8395 0, 1, and 2 exist, because some OS complain for execs without them (see
8396 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8397 descriptors. However, the code omitted to check that the open succeeded,
8398 causing mysterious errors if for some reason the permissions on /dev/null
8399 got screwed. Now Exim writes a message to the main and panic logs, and
8400 bombs out if it can't open /dev/null.
8402 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8403 interact so that it is all more flexible. It is supposed to remain
8404 backwards compatible. Also added extra_local_interfaces.
8406 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8407 to bomb out with an assertion failure - to the client this appears as a
8408 connection drop. This problem occurs in the part of the code that was taken
8409 from the Samba project. Fortunately, the assertion is in a very simple
8410 function, so I have fixed this by reproducing the function inline in the
8411 one place where it is called, and arranging for authentication to fail
8412 instead of killing the process with assert().
8414 75. The SPA client code was not working when the server requested OEM rather
8415 than Unicode encoding.
8417 76. Added code to make require_files with a specific uid setting more usable in
8418 the case where statting the file as root fails - usually a non-root-mounted
8419 NFS file system. When this happens and the failure is EACCES, Exim now
8420 forks a subprocess and does the per-uid checking as the relevant uid.
8422 77. Added process_log_path.
8424 78. If log_file_path was not explicitly set, a setting of check_log_space or
8425 check_log_inodes was ignored.
8427 79. If a space check for the spool or log partitions fails, the incident is now
8428 logged. Of course, in the latter case the data may get lost...
8430 80. Added the %p formatting code to string_format() so that it can be used to
8431 print addresses in debug_print(). Adjusted all the address printing in the
8432 debugging in store.c to use %p rather than %d.
8434 81. There was a concern that a line of code in smtp_in.c could overflow a
8435 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8436 initially expressed, the concern was not well-founded, because trailing
8437 spaces are removed early. However, if the trailing spaces were followed by
8438 a NULL, they did not get removed, so the overflow was possible. Two fixes
8441 (a) I re-wrote the offending code in a cleaner fashion.
8442 (b) If an incoming SMTP command contains a NULL character, it is rejected
8445 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8446 runs initgroups(), so that if the Exim user is in any additional groups,
8447 they will be used during message reception.
8453 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob