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 Handle error on close of the spool data file during reception. Previously
9 This was only logged, on the assumption that errors would be seen for
10 a previous fflush(). However, a fuse filesystem has been reported as
11 showing this an error for the fclose(). The spool is now in an uncertain
12 state, and we have logged and responded acceptance. Change this to
13 respond with a temp-reject, wipe spoolfiles, and log the error detail.
19 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
20 SMTP connection" log lines.
22 JH/02 Option default value updates:
23 - queue_fast_ramp (main) true (was false)
24 - remote_max_parallel (main) 4 (was 2)
26 JH/03 Cache static regex pattern compilations, for use by ACLs.
28 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
29 Make the rewrite never match and keep the logging. Trust the
30 admin to be using verify=header-syntax (to actually reject the message).
32 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
33 (under Linux) we watch the dir containing the final file; previously
34 it would be the dir with the first symlink. We still do not monitor
37 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
38 dn_expand() is happy to pass them through.
40 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
41 the file with the proof had an unchanged name, the new proof(s) were
42 loaded on top of the old ones (and nover used; the old ones were stapled).
44 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
45 more than one message arrived in a single connection a reference from
46 the earlier message could be re-used. Often a sigsegv resulted.
47 These variables were introduced in Exim 4.87.
48 Debug help from Graeme Fowler.
50 JH/09 Fix ${filter } for conditions that modify $value. Previously the
51 modified version would be used in construction the result, and a memory
54 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
55 Find and fix by Jasen Betts.
57 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
58 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
59 the systemwide configuration to override the Exim config.
61 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
62 API changes in libopendmarc.
64 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
65 pid 1, in the normal "background daemon" mode, having to drop process-
66 group leadership also lost track of needing to create listener sockets.
68 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
69 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
71 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
72 a capture group which obtained no text (eg. "(abc)*" matching zero
73 occurrences) could cause a segfault if the corresponding $<n> was
76 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
77 included a close-brace character (eg. it itself used an expansion) an
80 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
81 starting TLS. Previously it was after, meaning that attackers on such
82 ports had to be screened using the host_reject_connection main config
83 option. The new sequence aligns better with the STARTTLS behaviour, and
84 permits defences against crypto-processing load attacks, even though it
85 is strictly an incompatible change.
86 Also, avoid sending any SMTP fail response for either the connect ACL
87 or host_reject_connection, for TLS-on-connect ports.
89 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
90 Previously this was not permitted, but it makes reasonable sense.
91 While there, restore a restriction on using it from a connect ACL; given
92 the change JH/16 it could only return false (and before 4.91 was not
95 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
96 was exactly sized compared to the log buffer, a crash occurred with the
97 misleading message "bad memory reference; pool not found".
98 Found and traced by Jasen Betts.
100 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
101 dns_again_means_nonexist included an element causing a DNS lookup which
102 iteslf returned DNS_AGAIN, unbounded recursion occurred. Possible results
103 included (though probably not limited to) a process crash from stack
104 memory limit, or from excessive open files. Replace this with a paniclog
105 whine (as this is likely a configuration error), and returning
108 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
109 this always failed, probably leading to the usual downgrade to in-clear
112 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
113 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
114 to not checking that list for these lookups.
116 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
119 JH/23 Fix crash in string expansions. Previously, if an empty variable was
120 immediately followed by an expansion operator, a null-indirection read
121 was done, killing the process.
123 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
124 include an SMTP response string which is longer than that supported
125 by the delivering transport. Alleviate by wrapping such lines before
128 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
129 chars (RFC limit). Previously a limit of 12 items was made, which with
130 a not-impossible References: in the message being bounced could still
131 be over-large and get stopped in the transport.
133 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
134 close. Previously a bare socket close was done.
136 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
139 JH/28 Bug 2996: Fix a crash in the smtp transport. When finding that the
140 message being considered for delivery was already being handled by
141 another process, and having an SMTP connection already open, the function
142 to close it tried to use an uninitialized variable. This would afftect
143 high-volume sites more, especially when running mailing-list-style loads.
144 Pollution of logs was the major effect, as the other process delivered
145 the message. Found and partly investigated by Graeme Fowler.
147 JH/29 Change format of the internal ID used for message identification. The old
148 version only supported 31 bits for a PID element; the new 64 (on systems
149 which can use Base-62 encoding, which is all currently supported ones
150 but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
151 and must use Base-36). The new ID is 23 characters rather than 16, and is
152 visible in various places - notably logs, message headers, and spool file
153 names. Various of the ancillary utilities also have to know the format.
154 As well as the expanded PID portion, the sub-second part of the time
155 recorded in the ID is expanded to support finer precision. Theoretically
156 this permits a receive rate from a single comms channel of better than the
158 The major timestamp part of the ID is not changed; at 6 characters it is
159 usable until about year 3700.
160 Updating from previously releases is fully supported: old-format spool
161 files are still usable, and the utilities support both formats. New
162 message will use the new format. The one hints-DB file type which uses
163 message-IDs (the transport wait- DB) will be discarded if an old-format ID
164 is seen; new ones will be built with only new-format IDs.
165 Optionally, a utility can be used to convert spool files from old to new,
166 but this is only an efficiency measure not a requirement for operation
167 Downgrading from new to old requires running a provided utility, having
168 first stopped all operations. This will convert any spool files from new
169 back to old (losing time-precision and PID information) and remove any
170 wait- hints databases.
172 JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
173 we treated them as item separators when parsing for a list item, but they
174 need to be protected by the doublequotes. While there, add handling for
177 JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
178 Found and fixed by Jasen Betts. No testcase for this as my usual text
179 editor insists on emitting only valid UTF-8.
181 JH/32 Fix "tls_dhparam = none" under GnuTLS. At least with 3.7.9 this gave
182 a null-indirection SIGSEGV for the receive process.
184 JH/33 Fix free for live variable $value created by a ${run ...} expansion during
185 -bh use. Internal checking would spot this and take a panic.
187 JH/34 Bug 3013: Fix use of $recipients within arguments for ${run...}.
188 In 4.96 this would expand to empty.
190 JH/35 Bug 3014: GnuTLS: fix expiry date for an auto-generated server
191 certificate. Find and fix by Andreas Metzler.
193 JH/36 Add ARC info to DMARC hostory records.
195 JH/37 Bug 3016: Avoid sending DSN when message was accepted under fakereject
196 or fakedefer. Previously the sender could discover that the message
197 had in fact been accepted.
199 JH/38 Taint-track intermediate values from the peer in multi-stage authentation
200 sequences. Previously the input was not noted as being tainted; notably
201 this resulted in behaviour of LOGIN vs. PLAIN being inconsistent under
202 bad coding of authenticators.
204 JH/39 Bug 3023: Fix crash induced by some combinations of zero-length strings
205 and ${tr...}. Found and diagnosed by Heiko Schlichting.
207 JH/40 Support list of dkim results in the dkim_status ACL condition, making
208 it more usable in the data ACL.
214 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
215 after reception to before a subsequent reception. This should
216 mean slightly faster delivery, and also confirmation of reception
219 JH/02 Move from using the pcre library to pcre2. The former is no longer
220 being developed or supported (by the original developer).
222 JH/03 Constification work in the filters module required a major version
223 bump for the local-scan API. Specifically, the "headers_charset"
224 global which is visible via the API is now const and may therefore
225 not be modified by local-scan code.
227 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
228 sendfile() didi not account for the way the ClamAV driver code called it.
230 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
231 time check was being done for every character; replace that with one
234 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
235 sent was prefixed with a length byte.
237 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
238 RFC 5321. Previously Dovecot (at least) would log errors during
241 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
242 in 4.61 without a reason logged. Binaries will be bigger, which might
243 matter on diskspace-constrained systems, but debug is easier.
245 JH/09 Fix macro-definition during "-be" expansion testing. The move to
246 write-protected store for macros had not accounted for these runtime
247 additions; fix by removing this protection for "-be" mode.
249 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
250 handing out large-numbered file descriptors, violating the usual Unix
251 assumption (and required by Posix) that the lowest possible number will be
252 allocated by the kernel when a new one is needed. In the daemon, and any
253 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
254 are not useable for FD_SET() [and hence select()] and overwrite the stack.
255 Assorted crashes happen.
257 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
258 main-section options or in a connect ACL, the value from the first ever
259 connection was never replaced for subsequent connections. Found by
262 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
263 though only once PCRE2 was introduced: the memory accounting used under
264 debug offset allocations by an int, giving a hard trap in early startup.
265 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
267 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
268 with underbars is given. The write-protection of configuration introduced
269 in 4.95 trapped when normalisation was applied to an option not needing
272 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
274 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
275 failing to close the certificates directory, every hour or any time it
278 JH/16 Debugging initiated by an ACL control now continues through into routing
279 and transport processes. Previously debugging stopped any time Exim
280 re-execs, or for processing a queued message.
282 JH/17 The "expand" debug selector now gives more detail, specifically on the
283 result of expansion operators and items.
285 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
286 bad comparison between the option value and the name of the file to
287 be included was done, and a mismatch was wrongly identified.
288 4.88 to 4.95 are affected.
290 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
292 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
293 supplied as the db file-pair basename. Previously, if a directory
294 path was given, for example via the autoreply "once" option, the DB
295 file.pag and file.dir files would be created in that directory's
298 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
299 "taint" log_selector. These were previously deprecated.
301 JH/22 Fix static address-list lookups to properly return the matched item.
302 Previously only the domain part was returned.
304 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
305 the call into OpenSSL to send a TLS Close was being repeated; this
306 resulted in the library waiting for the peer's Close. If that was never
307 sent we waited forever. Fix by tracking send calls.
309 JH/24 The ${run} expansion item now expands its command string elements after
310 splitting. Previously it was before; the new ordering makes handling
311 zero-length arguments simpler. The old ordering can be obtained by
312 appending a new option "preexpand", after a comma, to the "run".
314 JH/25 Taint-check exec arguments for transport-initiated external processes.
315 Previously, tainted values could be used. This affects "pipe", "lmtp" and
316 "queryprogram" transport, transport-filter, and ETRN commands.
317 The ${run} expansion is also affected: in "preexpand" mode no part of
318 the command line may be tainted, in default mode the executable name
321 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
322 the the facility was not passed across execs, and only the first message
323 passed over a connection could use BDAT; any further ones using DATA.
325 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
326 uses $sending_ip_address and an interface is specified.
327 Previously any use of the local address in the EHLO name disabled
328 PIPECONNECT, the common case being to use the rDNS of it.
330 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
331 resumption. Previously verify failed because no certificate status is
332 passed on the wire for the restarted session. Fix by using the recorded
333 ocsp status of the stored session for the new connection.
335 JH/29 TLS resumption: the key for session lookup in the client now includes
336 more info that a server could potentially use in configuring a TLS
337 session, avoiding oferring mismatching sessions to such a server.
338 Previously only the server IP was used.
340 JH/30 Fix string_copyn() for limit greater than actual string length.
341 Previously the copied amount was the limit, which could result in a
342 overlapping memcpy for newly allocated destination soon after a
343 source string shorter than the limit. Found/investigated by KM.
345 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
346 close; it may be needed for a subsequent connection. This caused a
347 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
349 JH/32 Fix CHUNKING for a second message on a connection when the first was
350 rejected. Previously we did not reset the chunking-offered state, and
351 erroneously rejected the BDAT command. Investigation help from
354 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
355 an empty address. Previously the expansion returned an error.
357 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
358 proxy. Previously these were misparsed, leading to paniclog entries.
364 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
365 related applications. Previously an "H" was used where available info
366 says that "M" should be, so change to match.
368 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
369 as arguments, so an implementation trying to copy these into a local
370 buffer was taking a taint-enforcement trap. Fix by using dynamically
371 created buffers. Similar fix for radius expansion condition.
373 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
374 reasonable, eg. to count headers. Fix by using dynamically created
375 buffers rather than a local. Do similar fixes for ACL actions "dcc",
376 "log_reject_target", "malware" and "spam"; the arguments are expanded
377 so could be handling tainted values.
379 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
380 broken the (no-op) support for this sendmail command. Restore it
381 to doing nothing, silently, and returning good status.
383 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
384 record path was given (or the default used) without a leading directory
385 path, an error occurred on trying to open it. Use the transport's working
388 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
389 transport. Previously it was the name on the DNS A-record; use instead
390 the head of the CNAME chain leading there (if there is one). This seems
391 to align better with RFC 6125.
393 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
394 smtp_accept_max_per_host allocated resources which were not released
395 when the limit was exceeded. This eventually crashed the daemon. Fix
396 by adding a release action in that path.
398 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
399 expanded; previously using tainted values was rejected. Fix by using
400 dynamically-created buffers.
402 JH/09 Relax restrictions on ACL verify condition needing access to message
403 headers. Previously they were only permitted in data and non-smtp ACLs;
404 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
405 not_blind, header_sender and header_names_ascii verification.
407 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
408 Previously a macro used one argument twice; when called with the
409 argument as an expression having side-effects, incorrect operation
410 resulted. Use an inlineable function.
412 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
413 held open for a verify callout. Previously this wan not accounted for
414 and a corrupt onward SMTP conversation resulted.
416 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
417 Previously they were embedded naively in the constructed address; when
418 needed, strip the quoting and quote the entire local_part.
419 Also make the inbound_srs expansion condition handle quoting.
421 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
422 excluded, not matching the documentation.
424 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
425 was given for the sqlite_dbfile a trap resulted.
427 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
428 "name" argument resulted in a trap. There is no reason to disallow such;
429 this was a coding error.
431 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
432 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
433 spent suspended, ignoring the POSIX definition. Previously we assumed
434 it did and a constant offset from real time could be used as a correction.
435 Change to using the same clock source for the start-of-message and the
436 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
437 exists, just to get a clock slightly more aligned to reality.
439 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
440 RFC says it is optional some validators care. The missing char was not
441 intended but triggered by a line-wrap alignment. Discovery and fix by
442 Guillaume Outters, hacked on by JH.
444 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
445 name being quoted was tainted a trap would be taken. Fix by using
446 dynamically created buffers. The routine could have been called by a
447 rewrite with the "h" flag, by using the "-F" command-line option, or
448 by using a "name=" option on a control=submission ACL modifier.
450 JH/19 SPF: change the Authentication-Results expansion component to give
451 smtp.helo when the sender domain is empty. Previously it gave
454 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
455 not in 127.0.0.0/8 to help in spotting list domains taken over by a
456 domain-parking registrar.
458 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
459 Previously when a whitespace character was specified it was not inserted
460 after removing the newline.
462 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
463 the domain part of the recipient address. This overrides any tls_sni
464 option set, which was previously used.
466 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
469 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
470 is_tainted() had an off-by-one error in the overenthusiastic direction.
471 Find and fix by Gavan. Although NetBSD is not a supported platform for
472 4.94 this bug could affect other platforms.
474 PP/01 Fix default prime selection to be consistent.
475 One path used ike23 still, instead of exim.dev.20160529.3; now both
476 execution flows will use the same DH primes (currently
477 exim.dev.20160529.3).
479 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
480 option in smtp transport, to match the documentation. Previously
481 verification was not being done in some cases where it should have been.
483 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
484 than one server was defined and depending on the platform memory layout
485 details, an internal consistency trap could be hit while walking the list
488 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
489 files. The value is used by the authresults expansion item. Previously
490 if this was used in a router or transport, a crash could result.
492 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
493 have a sufficient incidence of EINTR returns from select that an
494 interaction with other operations done by the main daemon loop exposed
495 a bug in the error-handling. This was benign apart from the log
498 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
499 for consistency with delivered "=>" and failed "**" lines. While we're
500 there, handle PRX and TFO.
502 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
503 applied. This resulted, if any header-line rewrite rules were configured,
504 in a panic-log triggerable by sending a message with a long address in
505 a header. Fix by increasing the arbitrary limit to larger than a single
506 (dewrapped) 5322 header line maximum size.
508 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
509 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
510 RFC 6648 which deprecates X- options in protocols as a general practice.
511 Changeover between the implementations is handled by the mechanisms
514 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
515 a remote which uses callout/hold. Previously the local was queued.
517 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
520 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
521 log line. The asterisk is now consistently appended to the remote IP
522 (and port, if given), and will also be provided on defer and fail log
523 lines. Previously it could be placed on the local IP if that was being
524 logged, and was only provided on delivery lines.
526 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
528 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
529 authenticator client_send option. Previously the next char, after a pair
530 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
531 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
532 documentation. There is still no way to get a leading ^ immediately
533 after a NUL (ie. for the password of a PLAIN method authenticator.
535 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
536 files. For bad sizes read, delete the record and whine to paniclog.
538 JH/38 When logging an AUTH failure, as server, do not include sensitive
539 information. Previously, the credentials would be included if given
540 as part of the AUTH command line and an ACL denied authentication.
542 JH/39 Bug 2691: fix $local_part_data. When the matching list element
543 referred to a file, bad data was returned. This likely also affected
546 JH/40 The gsasl authenticator now supports caching of the salted password
547 generated by the client-side implementation. This required the addition
548 of a new variable: $auth4.
550 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
551 left undeleted; the attempt to re-create it then failed - resulting in
552 the usual "SIGHUP tp have daemon reload configuration" to not work.
553 This affected any platform not supporting "abstract" Unix-domain
554 sockets (i.e. not Linux).
556 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
557 recipients" response to RCPT in a later response, with a 250. The
558 previous coding assumed this would not happen, and under PIPELINING
559 would result in both lost and duplicate recipients for a message.
561 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
562 Previously the weighting was incorrectly applied. Similar fix for socks
563 proxies. Found and fixed by Heiko Schlichting.
565 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
566 not handle sub-lists included using the +namedlist syntax. While
567 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
568 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
571 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
572 Previously the permanent pool was used, so the sore could not be freed.
573 This meant a connection with many messages would use continually-growing
576 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
577 per-pool so as not to waste too much space. Previously a constant size
578 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
579 DOS attacks harder. The cost is wasted memory use in the larger blocks.
581 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
582 same space repeatedly, and a smaller process footprint.
584 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
585 for GnuTLS. Previously the name started "%s" which, while not a bug,
586 looked as if if might be one.
588 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
589 "continued connection") make the $proxy_* variables available. Previously
590 the information was not passed across the exec() call for subsequent
591 transport executions. This also mean that the log lines for the
592 messages can show the proxy information.
594 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
595 receive time. With modern systems the difference is significant.
596 The historical behaviour can be restored by disabling (a new) log_selector
597 "queue_time_exclusive".
599 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
600 content) were specifically tested for. Now, also cover expansions
601 resulting in ACL names and inline ACL content.
603 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
604 making it unusable in complex expressions.
606 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
607 fail with a taint-check on the spoolfile name, and leave the message
610 HS/01 Enforce absolute PID file path name.
612 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
614 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
616 PP/02 Bug 2643: Correct TLS DH constants.
617 A missing NUL termination in our code-generation tool had led to some
618 incorrect Diffie-Hellman constants in the Exim source.
619 Reported by kylon94, code-gen tool fix by Simon Arlott.
621 PP/03 Impose security length checks on various command-line options.
622 Fixes CVE-2020-SPRSS reported by Qualys.
624 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
625 better. Reported by Qualys.
627 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
628 providing a particularly obnoxious sender full name.
631 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
633 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
636 PP/08 Change default for recipients_max from unlimited to 50,000.
638 PP/09 Fix security issue with too many recipients on a message (to remove a
639 known security problem if someone does set recipients_max to unlimited,
640 or if local additions add to the recipient list).
641 Fixes CVE-2020-RCPTL reported by Qualys.
643 PP/10 Fix security issue in SMTP verb option parsing
644 Fixes CVE-2020-EXOPT reported by Qualys.
646 PP/11 Fix security issue in BDAT state confusion.
647 Ensure we reset known-good where we know we need to not be reading BDAT
648 data, as a general case fix, and move the places where we switch to BDAT
649 mode until after various protocol state checks.
650 Fixes CVE-2020-BDATA reported by Qualys.
652 HS/03 Die on "/../" in msglog file names
654 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
655 the Exim runtime user are allowed to create files.
657 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
660 QS/03 When reading the output from interpreted forward files we do not
661 pass the pipe between the parent and the interpreting process to
662 executed child processes (if any).
664 QS/04 Always die if requested from internal logging, even is logging is
667 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
668 the API; compilation noo longer completes with DMARC support included.
669 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
670 been reported on other platforms.
672 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
674 JH/56 Make the majority of info read from config files readonly, for defence-in-
675 depth against exploits. Suggestion by Qualys.
676 Not supported on Solaris 10.
678 JH/57 Fix control=fakreject for a custom message containing tainted data.
679 Previously this resulted in a log complaint, due to a re-expansion present
680 since fakereject was originally introduced.
682 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
683 modifier was given, a loop resulted.
685 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
686 pipelined SMTP command followed the BDAT LAST then it would be
687 incorrectly treated as part of the message body, causing a verification
690 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
691 require looser validation rules than those for 821-level addresses,
692 which only permit IP addresses.
698 JH/01 Avoid costly startup code when not strictly needed. This reduces time
699 for some exim process initialisations. It does mean that the logging
700 of TLS configuration problems is only done for the daemon startup.
702 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
704 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
705 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
708 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
709 DKIM signing is being done. Previously a transport_filter would always
710 disable CHUNKING, falling back to traditional DATA.
712 JH/05 Regard command-line recipients as tainted.
714 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
716 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
717 PAM library frees one of the arguments given to it, despite the
718 documentation. Therefore a plain malloc must be used.
720 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
721 on-stack buffers were used, resulting in a taint trap when DSN information
722 copied from a received message was written into the buffer.
724 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
725 the ordering of its ARC headers. This caused a crash.
727 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
728 a new record was being constructed with information from the peer, a trap
731 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
732 installation would get error messages from DMARC verify, when it hit the
733 nonexistent file indicated by the default. Distros wanting DMARC enabled
734 should both provide the file and set the option.
735 Also enforce no DMARC verification for command-line sourced messages.
737 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
738 could, depending on the platform, hang at the STARTTLS response.
740 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
741 message on a connection. Previously if one message had ARC headers and
742 the following one did not, a crash could result when adding an
743 Authentication-Results: header.
745 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
746 Exim main code and Exim-related utities. The introduction of taint
747 tracking also did many adjustments to string handling. Since then, eximon
748 frequently terminated with an assert failure.
750 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
751 check for 452 responses. This slightly helps the inefficieny of doing
752 a large alias-expansion into a recipient-limited target. The max_rcpt
753 transport option still applies (and at the current default, will override
754 the new feature). The check is done for either cause of synch, and forces
755 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
756 connection. The new facility is not tunable at this time.
758 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
759 library live data was being used, so the results became garbage. Make
760 copies while it is still usable.
762 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
763 on delivery deferred (==) and failed (**) lines (if a delivery was
764 attemtped). Previously it was only on completion (=>) lines.
766 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
767 for the expansion of the server_scram_iter and server_scram_salt options.
769 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
770 are now specifically given a NO_DATA response without hitting the system
771 resolver. The library goes on to do the now-standard TXT lookup.
772 Use of dnsdb lookups is not affected.
774 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
775 only retrieve the errormessage once. Previously two calls to dlerror()
776 were used, and the second one (for mainlog/paniclog) retrieved null
779 JH/20 Taint checking: disallow use of tainted data for
780 - the appendfile transport file and directory options
781 - the pipe transport command
782 - the autoreply transport file, log and once options
783 - file names used by the redirect router (including filter files)
785 - paths used by single-key lookups
786 Previously this was permitted.
788 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
789 adjusted the size of a major service buffer; this failed because the
790 buffer was in use at the time. Change to a compile-time increase in the
791 buffer size, when this authenticator is compiled into exim.
793 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
794 previous fast-mode was untenable in the face of glibs using mmap to
795 support larger malloc requests.
797 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
798 New values supported, if defined on system where compiled:
799 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
800 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
802 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
803 running a limited number of proceses in parallel, a benefit is gained. The
804 amount varies with the platform hardware and load. The use of the option
805 queue_run_in_order means we cannot do this, as ordering becomes
808 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
809 had introduced a string-copy (for ensuring NUL-termination) which was not
810 appropriate for that case, which can include embedded NUL bytes in the
811 block of data. Investigation showed the copy to actually be needless, the
812 data being length-specified.
814 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
815 done during a receiving connection, and both used TLS, global info was
816 used rather than per-connection info for tracking the state of data
817 queued for transmission. This could result in a connection hang.
819 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
820 Previously, when delivering serveral messages down a single connection
821 only the first would provide a SIZE. This was due to the size information
822 not being properly tracked.
824 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
825 TAI (at 37 seconds currently), pretend to be in UTC for time-related
826 expansion and logging. Previously, spurious values such as a future
827 minute could be seen.
829 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
830 it could crash from a null-deref. This could also affect the
831 ${addresses: } operator and ${readsock } item.
833 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
834 message following a mime one, the variable was not reset.
836 JH/30 When an pipelined-connect fails at the first response, assume incorrect
837 cached capability (perhaps the peer reneged?) and immediately retry in
840 JH/31 Fix spurious detection of timeout while writing to transport filter.
842 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
843 an attempt to copy the string was made before checking it.
845 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
846 taint of the lookup key was maintained; we now regard the presence in the
847 filesystem as sufficient validation.
849 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
850 argument is supplied.
852 JH/35 The dsearch lookup now requires that the directory is an absolute path.
853 Previously this was not checked, and nonempty relative paths made an
854 access under Exim's current working directory.
856 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
857 Previously no event was raised.
859 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
860 parameter supplied by the sender MAIL FROM command. Previously it was
861 ignored, and only the check_spool_space option value for the required
864 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
865 the size of the signing public-key. Previously it was instead giving
866 the size of the signature hash.
868 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
869 the default. See the (new) dkim_verify_min_keysizes option.
871 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
872 and an ACL use a lookup for checking either the local_part or domain,
873 stale data could be accessed. Ensure that variable references are
874 dropped between messages.
876 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
877 by the client was not checked as pointing within response data before
878 being used. A malicious client could thus cause an out-of-bounds read and
879 possibly gain authentication. Fix by adding the check.
881 JH/42 Internationalisation: change the default for downconversion in the smtp
882 transport to be "if needed". Previously it was "as previously set" for
883 the message, which usually meant "if needed" for message-submission but
884 "no" for everything else. However, MTAs have been seen using SMTPUTF8
885 even when the envelope addresses did not need it, resulting in forwarding
886 failures to non-supporting MTAs. A downconvert in such cases will be
887 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
888 transport. The change does mean that addresses needing conversion will
889 be converted when previously a delivery failure would occur.
891 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
892 response was received it would be used unchecked in a fail-DSN, violating
893 standards on line-length limits. Truncate if needed.
895 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
896 doesn't work. (Additionally add a new main config option to configure the
903 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
904 side, to decode a TLS 1.3 packet capture.
906 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
907 Previously the default library behaviour applied, sending two, each in
910 JH/03 Debug output for ACL now gives the config file name and line number for
913 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
915 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
917 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
918 buffer overrun for (non-chunking) other transports.
920 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
921 TLS1.3, means that a server rejecting a client certificate is not visible
922 to the client until the first read of encrypted data (typically the
923 response to EHLO). Add detection for that case and treat it as a failed
924 TLS connection attempt, so that the normal retry-in-clear can work (if
925 suitably configured).
927 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
928 and/or domain. Found and fixed by Jason Betts.
930 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
931 configuration). If a CNAME target was not a wellformed name pattern, a
934 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
935 the OS reports them interleaved with other addresses.
937 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
938 used both for input and for a verify callout, both encrypted, SMTP
939 responses being sent by the server could be lost. This resulted in
940 dropped connections and sometimes bounces generated by a peer sending
943 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
944 string. Previously it was possible to cause undefined behaviour in a
945 library routine (usually a crash). Found by "zerons".
947 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
950 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
951 API was removed, so update to use the newer ones.
953 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
954 any timeout set, is taking a long time. Previously we would hang on to a
955 rotated logfile "forever" if the input was arriving with long gaps
956 (a previous attempt to fix addressed lack, for a long time, of initial
959 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
960 shared (NFS) environment. The length of the tempfile name is now
961 4 + 16 ("hdr.$message_exim_id") which might break on file
962 systems which restrict the file name length to lower values.
965 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
966 shared (NFS) environment.
968 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
969 did for all versions <4.90). Notably -M, -m, --invert, -I may be
972 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
973 on some platforms for bit 31.
975 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
976 to changes apparently associated with TLS1.3 handling some of the APIs
977 previously used were either nonfunctional or inappropriate. Strings
978 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
979 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
980 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
981 This affects log line X= elements, the $tls_{in,out}_cipher variables,
982 and the use of specific cipher names in the encrypted= ACL condition.
984 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
986 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
987 verification result was not updated unless hosts_require_ocsp applied.
989 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
990 queue_list_requires_admin set to false, non-admin users were denied the
993 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
994 directory-of-certs mode. Previously they were advertised despite the
997 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
998 A single TCP connection by a client will now hold a TLS connection open
999 for multiple message deliveries, by default. Previously the default was to
1002 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
1003 default. If built with the facility, DANE will be used. The facility
1004 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
1006 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
1007 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
1008 must be defined and you must still, unless you define DISABLE_TLS, manage
1009 the the include-dir and library-file requirements that go with that
1010 choice. Non-TLS builds are still supported.
1012 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
1015 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
1016 default. If the platform supports and has the facility enabled, it will
1017 be requested on all coneections.
1019 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
1020 controlled by the build-time option SUPPORT_PIPE_CONNECT.
1022 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
1024 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
1025 success-DSN messages. Previously the From: header was always the default
1026 one for these; the option was ignored.
1028 JH/28 Fix the timeout on smtp response to apply to the whole response.
1029 Previously it was reset for every read, so a teergrubing peer sending
1030 single bytes within the time limit could extend the connection for a
1031 long time. Credit to Qualsys Security Advisory Team for the discovery.
1033 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
1034 delivery address, which leaked information of the results of local
1035 forwarding. Change to the original envelope recipient address, per
1038 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
1039 requested. Previously not bounce was generated and a log entry of
1040 error ignored was made.
1042 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
1044 JH/32 Introduce a general tainting mechanism for values read from the input
1045 channel, and values derived from them. Refuse to expand any tainted
1046 values, to catch one form of exploit.
1048 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
1049 was unused and the unexpanded text used for the test. Found and
1050 fixed by Ruben Jenster.
1052 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
1053 an attempt to use a TLS library read routine dereffed a nul pointer,
1056 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
1057 them in our smtp response.
1059 JH/36 Have the general router option retry_use_local_part default to true when
1060 any of the restrictive preconditions are set (to anything). Previously it
1061 was only for check_local user. The change removes one item of manual
1062 configuration which is required for proper retries when a remote router
1063 handles a subset of addresses for a domain.
1065 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
1066 link count into consideration.
1068 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
1069 caused the extension of big_buffer, the following lines were ignored.
1071 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
1072 accordance with RFC 2308. Previously there was no expiry, so a longlived
1073 receive process (eg. due to ACL delays) versus a short SOA value could
1076 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
1078 JH/39 Promote DMARC support to mainline.
1080 JH/40 Bug 2452: Add a References: header to DSNs.
1082 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1083 parameters. The relevant library call is documented as "Deprecated: This
1084 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1085 3.6.0, DH parameters are negotiated following RFC7919."
1087 HS/06 Change the default of dnssec_request_domains to "*"
1089 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1090 carried on and emitted a BDAT command, even when PIPELINING was not
1093 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1094 buffer was used for the filename, resulting in a trap when tainted
1095 arguments (eg. $domain) were used.
1097 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1098 recommended to avoid a possible server-load attack. The feature can be
1099 re-enabled via the openssl_options main cofiguration option.
1101 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1102 for version 4.90 - adding a "more data" boolean to the arguments.
1103 Bumped the ABI version number also, this having been missed previously;
1104 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1105 respect of usage of smtp_printf() by either local_scan code or libraries
1106 accessed via the ${dlfunc } expansion item. Both will need coding
1107 adjustment for any calls to smtp_printf() to match the new function
1108 signature; a FALSE value for the new argument is always safe.
1110 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1111 the file-offset (which the Linux syscall does, and exim expects); this
1112 resulted in an indefinite loop.
1114 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1115 to do ARC verification. The Authentication-Results: header line added
1116 by the configuration then had no ARC item.
1118 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1119 an incorrect mode was used for reading the result, resulting in it being
1126 JH/01 Remove code calling the customisable local_scan function, unless a new
1127 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1129 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1130 non-signal-safe functions being used.
1132 JH/03 Bug 2269: When presented with a received message having a stupidly large
1133 number of DKIM-Signature headers, disable DKIM verification to avoid
1134 a resource-consumption attack. The limit is set at twenty.
1136 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1137 report of oldest_pass in ${authres } in consequence, and separate out
1138 some descriptions of reasons for verification fail.
1140 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1141 files in the spool were present and unlocked. A queue-runner could spot
1142 them, resulting in a duplicate delivery. Fix that by doing the unlock
1143 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1144 add more error-checking on spoolfile handling while that code is being
1147 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1148 No known attacks, no CVE, this is defensive hardening.
1150 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1151 a queue-runner could start a delivery while other operations were ongoing.
1152 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1153 Found and investigated by Tim Stewart. Fix by using the open message data
1154 file handle rather than opening another, and not locally closing it (which
1155 releases a lock) for that case, while creating the temporary .eml format
1156 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1158 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1159 $sender_verify_failure/$recipient_verify_failure to "random".
1161 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1164 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1165 Previously this would segfault.
1167 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1170 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1171 like zero, since the resolver should be doing this for us, But we need one
1172 as a CNAME but no MX presence gets the CNAME returned; we need to check
1173 that doesn't point to an MX to declare it "no MX returned" rather than
1174 "error, loop". A new main option is added so the older capability of
1175 following some limited number of chain links is maintained.
1177 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1179 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1180 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1181 now-deprecated earlier definitions used only specified the range up to TLS
1182 1.2 (in the older-version library docs).
1184 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1186 JH/15 Rework TLS client-side context management. Stop using a global, and
1187 explicitly pass a context around. This enables future use of TLS for
1188 connections to service-daemons (eg. malware scanning) while a client smtp
1189 connection is using TLS; with cutthrough connections this is quite likely.
1191 JH/16 Fix ARC verification to do AS checks in reverse order.
1193 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1195 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1196 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1197 Previously the "utf8" would be re-prepended for every additional message.
1199 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1200 Previously thery were accepted, resulting in issues when attempting to
1201 forward messages to a non-supporting MTA.
1203 PP/02 Let -n work with printing macros too, not just options.
1205 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1206 one parent address was copied, and bogus data was used at delivery-logging
1207 time. Either a crash (after delivery) or bogus log data could result.
1208 Discovery and analysis by Tim Stewart.
1210 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1211 Previously if the string ended mid-character, we did not insert the
1212 promised '?' replacement.
1214 PP/04 Documentation: current string operators work on bytes, not codepoints.
1216 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1217 should pack well giving a smaller memory footprint so better caching and
1218 therefore performance. Group the declarations where this can't be done so
1219 that the byte-sized flag variables are not interspersed among pointer
1220 variables, giving a better chance of good packing by the compiler.
1222 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1223 non-null, to avoid issues with sites running BATV. Previously reports were
1224 sent with an empty envelope sender so looked like bounces.
1226 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1227 The ignore_error flag wasn't being returned from the filter subprocess so
1228 was not set for later routers. Investigation and fix by Matthias Kurz.
1230 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1231 and a msg:complete for the whole, when a message is manually removed using
1232 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1234 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1235 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1236 hope that is portable enough.
1238 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1239 requiring a known-CA anchor certificate; make it now rely entirely on the
1240 TLSA as an anchor. Checking the name on the leaf cert against the name
1241 on the A-record for the host is still done for TA (but not for EE mode).
1243 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1244 included in delivery lines for non-proxied connections, when compiled with
1245 SUPPORT_SOCKS and running with proxy logging enabled.
1247 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1248 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1249 move the existing event to fire before the normal logging of message
1250 failure so that custom logging is bracketed by normal logging.
1252 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1253 msg:fail:internal event. Developement by Matthias Kurz.
1255 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1256 far too small for todays use of crypto signatures stored there. Go all
1257 the way to the max DNS message size of 64kB, even though this might be
1258 overmuch for IOT constrained device use.
1260 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1261 copy a string over itself. The library routine is documented as not
1262 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1264 JH/32 For main options check_spool_space and check_inode_space, where the
1265 platform supports 64b integers, support more than the previous 2^31 kB
1266 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1267 the previous G, M, k.
1269 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1270 $authenticated_fail_id variable on authentication failure. Previously
1273 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1274 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1275 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1276 GNUTLS_SEC_PARAM_MEDIUM.
1278 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1279 side. Previously we would continue as if no SNI had been received.
1281 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1282 "<" character, which should be a list-separator specification, we walked
1283 off past the nul-terimation.
1285 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1286 causes) even when the retry time is not yet met. Previously they were
1287 not, meaning that when (say) an account was over-quota and temp-rejecting,
1288 and multiple senders' messages were queued, only one sender would get
1289 notified on each configured delay_warning cycle.
1291 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1293 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1294 cipher-suites, an error can be left on the stack even for a succeeding
1295 accept; this results in impossible error messages when a later operation
1298 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1299 return error codes indicating retry. Under TLS1.3 this becomes required.
1301 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1302 it only wrote the new authenticators, resulting in a lack of tracking of
1303 peer changes of ESMTP extensions until the next cache flush.
1305 JH/41 Fix the loop reading a message header line to check for integer overflow,
1306 and more-often against header_maxsize. Previously a crafted message could
1307 induce a crash of the recive process; now the message is cleanly rejected.
1309 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1310 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1316 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1317 When redis_servers is set to a list of > 1 element, and the Redis servers
1318 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1319 case of MOVED into a DEFER case instead, thus moving the query onto the
1320 next server in the list. For a cluster of N elements, all N servers must
1321 be defined in redis_servers.
1323 GF/02 Catch and remove uninitialized value warning in exiqsumm
1324 Check for existence of @ARGV before looking at $ARGV[0]
1326 JH/01 Replace the store_release() internal interface with store_newblock(),
1327 which internalises the check required to safely use the old one, plus
1328 the allocate and data copy operations duplicated in both (!) of the
1329 extant use locations.
1331 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1332 modifier. This matches the restriction on the commandline.
1334 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1335 Previously only the last row was returned.
1337 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1338 we assumed that tags in the header were well-formed, and parsed the
1339 element content after inspecting only the first char of the tag.
1340 Assumptions at that stage could crash the receive process on malformed
1343 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1344 While running the DKIM ACL we operate on the Permanent memory pool so that
1345 variables created with "set" persist to the DATA ACL. Also (at any time)
1346 DNS lookups that fail create cache records using the Permanent pool. But
1347 expansions release any allocations made on the current pool - so a dnsdb
1348 lookup expansion done in the DKIM ACL releases the memory used for the
1349 DNS negative-cache, and bad things result. Solution is to switch to the
1350 Main pool for expansions.
1351 While we're in that code, add checks on the DNS cache during store_reset,
1352 active in the testsuite.
1353 Problem spotted, and debugging aided, by Wolfgang Breyha.
1355 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1356 When none of the hosts presented to a transport match an already-open
1357 connection, close it and proceed with the list. Previously we would
1358 queue the message. Spotted by Lena with Yahoo, probably involving
1361 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1362 Previously a spurious "250 OK id=" response was appended to the proper
1365 JH/08 The "support for" informational output now, which built with Content
1366 Scanning support, has a line for the malware scanner interfaces compiled
1367 in. Interface can be individually included or not at build time.
1369 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1370 by the template makefile "src/EDITME". The "STREAM" support for an older
1371 ClamAV interface method is removed.
1373 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1374 rows affected is given instead).
1376 JH/11 The runtime Berkeley DB library version is now additionally output by
1377 "exim -d -bV". Previously only the compile-time version was shown.
1379 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1380 SMTP connection. Previously, when one had more recipients than the
1381 first, an abortive onward connection was made. Move to full support for
1382 multiple onward connections in sequence, handling cutthrough connection
1383 for all multi-message initiating connections.
1385 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1386 routers. Previously, a multi-recipient message would fail to match the
1387 onward-connection opened for the first recipient, and cause its closure.
1389 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1390 a timeout on read on a GnuTLS initiating connection, resulting in the
1391 initiating connection being dropped. This mattered most when the callout
1392 was marked defer_ok. Fix to keep the two timeout-detection methods
1395 JH/15 Relax results from ACL control request to enable cutthrough, in
1396 unsupported situations, from error to silently (except under debug)
1397 ignoring. This covers use with PRDR, frozen messages, queue-only and
1400 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1402 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1403 metadata, resulting in a crash in free().
1405 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1406 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1407 Broken also in d185889f4, with init system revamp.
1409 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1410 Previously we abruptly closed the connection after reading a malware-
1411 found indication; now we go on to read the "scan ok" response line,
1414 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1415 ACL. Previously, a crash would result.
1417 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1418 macro text after a replacement (previously it was only once per line) and
1419 by skipping builtin macros when searching for an uppercase lead character.
1421 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1422 for the build is renamed.
1424 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1425 was allocated for every new TLS startup, meaning one per message. Fix
1426 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1428 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1429 reported the original. Fix to report (as far as possible) the ACL
1430 result replacing the original.
1432 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1433 OpenSSL. Certificate information is loaded for every new TLS startup,
1434 and the resources needed to be freed.
1436 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1438 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1441 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1442 DATA response info to the (existing) per-recipient response info for
1443 the "C=" log element. It can have useful tracking info from the
1444 destination system. Patch from Simon Arlott.
1446 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1447 length value. Previously this would segfault.
1449 HS/02 Support Avast multiline protoocol, this allows passing flags to
1450 newer versions of the scanner.
1452 JH/28 Ensure that variables possibly set during message acceptance are marked
1453 dead before release of memory in the daemon loop. This stops complaints
1454 about them when the debug_store option is enabled. Discovered specifically
1455 for sender_rate_period, but applies to a whole set of variables.
1456 Do the same for the queue-runner and queue-list loops, for variables set
1457 from spool message files. Do the same for the SMTP per-message loop, for
1458 certain variables indirectly set in ACL operations.
1460 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1461 as a multi-recipient message from a mailinglist manager). The coding had
1462 an arbitrary cutoff number of characters while checking for more input;
1463 enforced by writing a NUL into the buffer. This corrupted long / fast
1464 input. The problem was exposed more widely when more pipelineing of SMTP
1465 responses was introduced, and one Exim system was feeding another.
1466 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1467 receiving system, and refused recipients seen by the sending system
1468 (propating to people being dropped from mailing lists).
1469 Discovered and pinpointed by David Carter.
1471 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1472 replaced by the ${authresults } expansion.
1474 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1476 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1477 allows proper process termination in container environments.
1479 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1480 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1482 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1483 and "err_perm", deprecated since 4.83 when the RFC-defined words
1484 "temperror" and "permerror" were introduced.
1486 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1487 transport-filters or DKIM-signing. The restriction was lost in the
1488 consolidation of verify-callout and delivery SMTP handling.
1489 Extend the restriction to also cover ARC-signing.
1491 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1492 in defer=pass mode supply a 450 to the initiator. Previously the message
1495 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1496 tls_require_ciphers is used as before.
1498 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1499 "pass_unscanned". Only tmpfails from the scanner are written to
1500 the paniclog, as they may require admin intervention (permission
1501 denied, license issues). Other scanner errors (like decompression
1502 bombs) do not cause a paniclog entry.
1504 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1505 Previously it was possible to log spurious information in receive log
1508 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1509 triggered odd behaviour from Outlook Express clients.
1511 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1514 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1515 since the IETF WG has not yet settled on that versus the original
1516 "bare" representation.
1518 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1519 Previously the millisecond value corrupted the output.
1520 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1521 corrupted the output.
1527 JH/01 Rework error string handling in TLS interface so that the caller in
1528 more cases is responsible for logging. This permits library-sourced
1529 string to be attached to addresses during delivery, and collapses
1530 pairs of long lines into single ones.
1532 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1533 during configuration. Wildcards are allowed and expanded.
1535 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1536 This permits better logging.
1538 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1539 do not close it down and have the child transport start it up again on
1540 the passed-on TCP connection. Instead, proxy the child (and any
1541 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1542 affected: the continued delivery log lines do not have any DNSSEC, TLS
1543 Certificate or OCSP information. TLS cipher information is still logged.
1545 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1546 identical IP addresses on different listening ports. Will also affect
1549 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1550 add noisy ifdef guards to special-case this sillyness.
1551 Patch from Bernd Kuhls.
1553 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1554 than 255 are no longer allowed.
1556 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1557 Disable the session-cache too, which might reduce our load. Since we
1558 currrectly use a new context for every connection, both as server and
1559 client, there is no benefit for these.
1560 GnuTLS appears to not support tickets server-side by default (we don't
1561 call gnutls_session_ticket_enable_server()) but client side is enabled
1562 by default on recent versions (3.1.3 +) unless the PFS priority string
1565 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1566 <https://reproducible-builds.org/specs/source-date-epoch/>.
1568 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1569 the check for any unsuccessful recipients did not notice the limit, and
1570 erroneously found still-pending ones.
1572 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1573 MSG_MORE. Only in-clear (not on TLS connections).
1575 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1576 transport-filter is involved we can buffer the headers in memory for
1577 creating the signature, and read the spool data file once for the
1578 signature and again for transmission.
1580 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1581 4.77 as the kernel support then wasn't solid, having issues in 64bit
1582 mode. Now, it's been long enough. Add support for FreeBSD also.
1584 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1585 case where the routing stage had gathered several addresses to send to
1586 a host before calling the transport for the first, we previously failed
1587 to close down TLS in the old transport process before passing the TCP
1588 connection to the new process. The new one sent a STARTTLS command
1589 which naturally failed, giving a failed delivery and bloating the retry
1590 database. Investigation and fix prototype from Wolfgang Breyha.
1592 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1593 false-negatives in the check that the sender had not preempted a response
1594 or prompt from Exim (running as a server), due to that code's lack of
1595 awareness of the SMTP input buffering.
1597 PP/04 Add commandline_checks_require_admin option.
1598 Exim drops privileges sanely, various checks such as -be aren't a
1599 security problem, as long as you trust local users with access to their
1600 own account. When invoked by services which pass untrusted data to
1601 Exim, this might be an issue. Set this option in main configuration
1602 AND make fixes to the calling application, such as using `--` to stop
1605 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1606 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1607 responses to those, into a single TLS record each way (this usually means
1608 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1611 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1612 affects you only if you're dancing at the edge of the param size limits.
1613 If you are, and this message makes sense to you, then: raise the
1614 configured limit or use OpenSSL 1.1. Nothing we can do for older
1617 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1618 cmdline element to get the documented default one. Previously it was
1621 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1622 are unsuable for non-message-specific reasons - eg. connection timeout,
1623 banner-time rejection.
1625 JH/16 Fix logging of delivery remote port, when specified by router, under
1628 PP/06 Repair manualroute's ability to take options in any order, even if one
1629 is the name of a transport.
1632 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1634 JH/17 Change the list-building routines interface to use the expanding-string
1635 triplet model, for better allocation and copying behaviour.
1637 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1638 Previously it was constructed the first time a possibly-matching string
1639 was met in the configuration file input during startup; now it is done
1642 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1643 compatible one, to avoid the (poorly documented) possibility of a config
1644 file in the working directory redirecting the DB files, possibly correpting
1645 some existing file. CVE-2017-10140 assigned for BDB.
1647 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1648 cache-hot. Previously, although the result was properly cached, the
1649 initial verify call returned a defer.
1651 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1652 the main verify for receipient in uncached-mode.
1654 JH/22 Retire historical build files to an "unsupported" subdir. These are
1655 defined as "ones for which we have no current evidence of testing".
1657 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1658 if present. Previously it was ignored.
1660 JH/24 Start using specified-initialisers in C structure init coding. This is
1661 a C99 feature (it's 2017, so now considered safe).
1663 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1664 if was a fixed-sized field and bitmask ops via macros; it is now more
1667 PP/07 GitHub PR 56: Apply MariaDB build fix.
1668 Patch provided by Jaroslav Škarvada.
1670 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1671 during Coverity cleanups [4.87 JH/47]
1672 Diagnosis and fix provided by Michael Fischer v. Mollard.
1674 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1675 the right size to place the terminating semicolon on its own folded
1676 line, the header hash was calculated to an incorrect value thanks to
1677 the (relaxed) space the fold became.
1679 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1680 and confused the parent.
1682 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1683 which could crash as a result. This could lead to undeliverable messages.
1685 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1688 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1689 matters on fast-turnover and PID-randomising systems, which were getting
1690 out-of-order delivery.
1692 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1693 a possibly-overlapping copy. The symptom was that "Remote host closed
1694 connection in response to HELO" was logged instead of the actual 4xx
1697 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1698 Previously only that bufferd was discarded, resulting in SYMTP command
1701 JH/32 DKIM: when a message has multiple signatures matching an identity given
1702 in dkim_verify_signers, run the dkim acl once for each. Previously only
1703 one run was done. Bug 2189.
1705 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1706 "panic the current process" to "deliberately defer". The panic log is
1707 still written with the problem list name; the mail and reject logs now
1708 get a temp-reject line for the message that was being handled, saying
1709 something like "domains check lookup or other defer". The SMTP 451
1710 message is still "Temporary local problem".
1712 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1713 A crafted sequence of BDAT commands could result in in-use memory beeing
1714 freed. CVE-2017-16943.
1716 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1717 from SMTP input. Previously it was always done; now only done for DATA
1718 and not BDAT commands. CVE-2017-16944.
1720 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1721 to the message (such as an overlong header line). Previously this was
1722 not done and we did not exit BDAT mode. Followon from the previous item
1723 though a different problem.
1729 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1730 than -2003 did; needs libidn2 in addition to libidn.
1732 JH/02 The path option on a pipe transport is now expanded before use.
1734 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1735 Patch provided by "Björn", documentation fix added too.
1737 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1738 missing a wire-to-host endian conversion.
1740 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1741 close after a BDAT command line could be taken as a following command,
1742 giving a synch failure. Fix by only checking for synch immediately
1743 before acknowledging the chunk.
1745 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1746 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1747 macro. Patches provided by Josh Soref.
1749 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1750 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1751 by IANA as a service extension. However, John Klensin suggests that we
1754 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1755 the dkim code may be unix-mode line endings rather than smtp wire-format
1756 CRLF, so prepend a CR to any bare LF.
1758 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1759 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1761 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1762 the first were themselves being wrongly included in the feed into dkim
1763 processing; with most chunk sizes in use this resulted in an incorrect
1764 body hash calculated value.
1766 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1767 DKIM signature block, for verification. Although advised against by
1768 standards it is specifically not ruled illegal.
1770 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1772 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1773 missing a body hash (the bh= tag).
1775 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1776 It seems that HAProxy sends the Proxy Protocol information in clear and
1777 only then does a TLS startup, so do the same.
1779 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1780 TCP connections (such as for Spamd) unless the daemon successfully set
1781 Fast Open mode on its listening sockets. This fixes breakage seen on
1782 too-old kernels or those not configured for Fast Open, at the cost of
1783 requiring both directions being enabled for TFO, and TFO never being used
1784 by non-daemon-related Exim processes.
1786 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1787 endings, at least on the first header line. Try to canonify any that get
1788 past that check, despite the cost.
1790 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1791 now limited to an arbitrary five deep, while parsing addresses with the
1792 strip_excess_angle_brackets option enabled.
1794 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1795 instead leave the unprompted TLS handshake in socket buffer for the
1796 TLS library to consume.
1798 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1800 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1802 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1803 region in one operation, for speed, and this leaves assigned pointers
1804 dangling. Add checks run only under the testsuite which checks all
1805 variables at a store-reset and panics on a dangling pointer; add code
1806 explicitly nulling out all the variables discovered. Fixes one known
1807 bug: a transport crash, where a dangling pointer for $sending_ip_address
1808 originally assigned in a verify callout, is re-used.
1810 PP/06 Drop '.' from @INC in various Perl scripts.
1812 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1814 PP/08 Reduce a number of compilation warnings under clang; building with
1815 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1816 should be warning-free.
1818 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1820 HS/01 Fix portability problems introduced by PP/08 for platforms where
1821 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1823 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1824 chunk. This allows us to accept broken chunked messages. We need a more
1825 general solution here.
1827 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1828 already-broken messages in the queue.
1830 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1832 JH/19 Fix reference counting bug in routing-generated-address tracking.
1838 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1839 supports it and a size is available (ie. the sending peer gave us one).
1841 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1842 years of being deprecated). The replacements are the ACLs
1843 acl_smtp_mime and acl_not_smtp_mime.
1845 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1846 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1847 or even an in-clear connection were permitted. Now, if the host lookup
1848 was dnssec and dane was requested then the host is only used if the
1849 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1850 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1851 if one fails this test.
1852 This means that a poorly-configured remote DNS will make it incommunicado;
1853 but it protects against a DNS-interception attack on it.
1855 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1856 non-noisy when a race steals the message being considered.
1858 JH/05 If main configuration option tls_certificate is unset, generate a
1859 self-signed certificate for inbound TLS connections.
1861 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1862 in rewrites and routers.
1864 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1865 and logged a warning sing 4.83; now they are a configuration file error.
1867 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1868 (lacking @domain). Apply the same qualification processing as RCPT.
1870 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1872 JH/10 Support ${sha256:} applied to a string (as well as the previous
1875 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1876 a cutthrough deliver is pending, as we always want to make a connection.
1877 This also avoids re-routing the message when later placing the cutthrough
1878 connection after a verify cache hit.
1879 Do not update it with the verify result either.
1881 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1882 when routing results in more than one destination address.
1884 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1885 signing (which inhibits the cutthrough capability). Previously only
1886 the presence of an option was tested; now an expansion evaluating as
1887 empty is permissible (obviously it should depend only on data available
1888 when the cutthrough connection is made).
1890 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1891 the relevant preceding SMTP command did not note the pipelining mode.
1893 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1894 Previously they were not counted.
1896 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1897 as one having no matching records. Previously we deferred the message
1898 that needed the lookup.
1900 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1901 distinguished as "(=".
1903 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1904 for missing MX records. Previously it only worked for missing A records.
1906 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1908 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1909 after the data-go-ahead and data-ack. Patch from Jason Betts.
1911 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1912 even for a "none" policy. Patch from Tony Meyer.
1914 JH/22 Fix continued use of a connection for further deliveries. If a port was
1915 specified by a router, it must also match for the delivery to be
1918 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1919 When one of the recipients of a message was unsuitable for the connection
1920 (has no matching addresses), we lost track of needing to mark it
1921 deferred. As a result mail would be lost.
1923 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1925 JH/25 Decoding ACL controls is now done using a binary search; the source code
1926 takes up less space and should be simpler to maintain. Merge the ACL
1927 condition decode tables also, with similar effect.
1929 JH/26 Fix problem with one_time used on a redirect router which returned the
1930 parent address unchanged. A retry would see the parent address marked as
1931 delivered, so not attempt the (identical) child. As a result mail would
1934 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1935 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1936 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1939 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1940 Main config options check_{log,spool}_{inodes,space} are now
1941 100 inodes, 10MB unless set otherwise in the configuration.
1943 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1944 Previously it only applied to the main-section connection policy
1947 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1949 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1950 by me. Added RFC7919 DH primes as an alternative.
1952 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1953 are not in the system include path.
1955 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1956 GnuTLS, when a session startup failed (eg because the client disconnected)
1957 Exim did stdio operations after fclose. This was exposed by a recent
1958 change which nulled out the file handle after the fclose.
1960 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1961 signed directly by the cert-signing cert, rather than an intermediate
1962 OCSP-signing cert. This is the model used by LetsEncrypt.
1964 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1966 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1967 an incoming connection.
1969 HS/02 Bug 1802: Do not half-close the connection after sending a request
1972 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1973 fallback to "prime256v1".
1975 JH/34 SECURITY: Use proper copy of DATA command in error message.
1976 Could leak key material. Remotely exploitable. CVE-2016-9963.
1982 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1983 and 3.4.4 - once the server is enabled to respond to an OCSP request
1984 it does even when not requested, resulting in a stapling non-aware
1985 client dropping the TLS connection.
1987 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1988 support variable-length bit vectors. No functional change.
1990 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1991 The I= interface field on outgoing lines is now after the H= remote
1992 host field, same as incoming lines. There is a separate
1993 outgoing_interface log selector which allows you to disable the
1996 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1997 If not running log_selector +smtp_connection the mainlog would be held
1998 open indefinitely after a "too many connections" event, including to a
1999 deleted file after a log rotate. Leave the per net connection logging
2000 leaving it open for efficiency as that will be quickly detected by the
2001 check on the next write.
2003 HS/01 Bug 1671: Fix post transport crash.
2004 Processing the wait-<transport> messages could crash the delivery
2005 process if the message IDs didn't exist for some reason. When
2006 using 'split_spool_directory=yes' the construction of the spool
2007 file name failed already, exposing the same netto behaviour.
2009 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
2010 mime_regex ACL conditions.
2012 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
2013 to DSN fail messages (bounces): remote IP, remote greeting, remote response
2014 to HELO, local diagnostic string.
2016 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
2017 log line to debug. Even when configured with a tls authenticator many
2018 client connections are expected to not authenticate in this way, so
2019 an authenticate fail is not an error.
2021 HS/02 Add the Exim version string to the process info. This way exiwhat
2022 gives some more detail about the running daemon.
2024 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
2025 matter for fast-change records such as DNSBLs.
2027 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
2028 retry record, even if constant. There may be multiple transports with
2029 different interface settings and the retry behaviour needs to be kept
2032 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
2034 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
2036 JH/10 Bug 840: fix log_defer_output option of pipe transport
2038 JH/11 Bug 830: use same host for all RCPTS of a message, even under
2039 hosts_randomize. This matters a lot when combined with mua_wrapper.
2041 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
2042 ${quote_pgsql:<string>} operator.
2044 JH/13 Bug 1708: avoid misaligned access in cached lookup.
2046 JH/14 Change header file name for freeradius-client. Relevant if compiling
2047 with Radius support; from the Gentoo tree and checked under Fedora.
2049 JH/15 Bug 1712: Introduce $prdr_requested flag variable
2051 JH/16 Bug 1714: Permit an empty string as expansion result for transport
2052 option transport_filter, meaning no filtering.
2054 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
2056 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
2057 defaults to "*" (all hosts). The variable is now available when not built
2058 with TLS, default unset, mainly to enable keeping the testsuite sane.
2059 If a server certificate is not supplied (via tls_certificate) an error is
2060 logged, and clients will find TLS connections fail on startup. Presumably
2061 they will retry in-clear.
2062 Packagers of Exim are strongly encouraged to create a server certificate
2063 at installation time.
2065 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
2066 with the $config_file variable.
2068 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
2069 in transport context, after the attempt, and per-recipient. The latter type
2070 is per host attempted. The event data is the error message, and the errno
2071 information encodes the lookup type (A vs. MX) used for the (first) host,
2072 and the trailing two digits of the smtp 4xx response.
2074 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
2075 to write to mainlog (or rejectlog, paniclog) in the window between file
2076 creation and permissions/ownership being changed. Particularly affects
2077 installations where exicyclog is run as root, rather than exim user;
2078 result is that the running daemon panics and dies.
2080 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2082 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2083 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2084 "pri" and "weight". Note that the previous implicit priority given by the
2085 list order is no longer honoured.
2087 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2088 for DKIM processing.
2090 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2091 by defining SUPPORT_SOCKS.
2093 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2094 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2095 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2096 variables are renamed to proxy_{local,external}_{address,port}.
2098 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2099 for a build by defining SUPPORT_I18N
2101 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2102 of the query string, and make ${quote_redis:} do that quoting.
2104 JH/29 Move Events support from Experimental to mainline, enabled by default
2105 and removable for a build by defining DISABLE_EVENT.
2107 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2109 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2110 cached by the daemon.
2112 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2113 by defining LOOKUP_REDIS. The libhiredis library is required.
2115 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2116 keys are given for lookup.
2118 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2119 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2120 only supported when built with TLS support. The PolarSSL SHA routines
2121 are still used when the TLS library is too old for convenient support.
2123 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2124 openssl_options), for security. OpenSSL forces this from version 1.1.0
2125 server-side so match that on older versions.
2127 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2128 allocation for $value could be released as the expansion processing
2129 concluded, but leaving the global pointer active for it.
2131 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2132 and to use the domains and local_parts ACL conditions.
2134 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2135 incorrectly not doubled on cutthrough transmission, hence seen as a
2136 body-termination at the receiving system - resulting in truncated mails.
2137 Commonly the sender saw a TCP-level error, and retransmitted the message
2138 via the normal store-and-forward channel. This could result in duplicates
2139 received - but deduplicating mailstores were liable to retain only the
2140 initial truncated version.
2142 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2144 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2146 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2147 we're in there, support oversigning also; bug 1309.
2149 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2151 HS/04 Add support for keep_environment and add_environment options.
2153 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2154 either intentional arithmetic overflow during PRNG, or testing config-
2157 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2158 delivery resulted in actual delivery. Cancel cutthrough before DATA
2161 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2162 rejects a recipient: pass the reject to the originator.
2164 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2165 Many were false-positives and ignorable, but it's worth fixing the
2168 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2169 for the new environment-manipulation done at startup. Move the routines
2170 from being local to tls.c to being global via the os.c file.
2172 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2173 an extract embedded as result-arg for a map, the first arg for extract
2174 is unavailable so we cannot tell if this is a numbered or keyed
2175 extraction. Accept either.
2181 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2184 JH/02 The smtp transport option "multi_domain" is now expanded.
2186 JH/03 The smtp transport now requests PRDR by default, if the server offers
2189 JH/04 Certificate name checking on server certificates, when exim is a client,
2190 is now done by default. The transport option tls_verify_cert_hostnames
2191 can be used to disable this per-host. The build option
2192 EXPERIMENTAL_CERTNAMES is withdrawn.
2194 JH/05 The value of the tls_verify_certificates smtp transport and main options
2195 default to the word "system" to access the system default CA bundle.
2196 For GnuTLS, only version 3.0.20 or later.
2198 JH/06 Verification of the server certificate for a TLS connection is now tried
2199 (but not required) by default. The verification status is now logged by
2200 default, for both outbound TLS and client-certificate supplying inbound
2203 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2206 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2207 Status Notification (bounce) messages are now MIME format per RFC 3464.
2208 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2209 under the control of the dsn_advertise_hosts option, and routers may
2210 have a dsn_lasthop option.
2212 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2213 default, modifiable by a malware= option. The list separator for
2214 the options can now be changed in the usual way. Bug 68.
2216 JH/10 The smtp_receive_timeout main option is now expanded before use.
2218 JH/11 The incoming_interface log option now also enables logging of the
2219 local interface on delivery outgoing connections.
2221 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2222 if the interface and destination host and port all match.
2224 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2227 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2228 Patch from Andrew Lewis.
2230 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2231 now supports optional time-restrictions, weighting, and priority
2232 modifiers per server. Patch originally by <rommer@active.by>.
2234 JH/16 The spamd_address main option now supports a mixed list of local
2235 and remote servers. Remote servers can be IPv6 addresses, and
2236 specify a port-range.
2238 JH/17 Bug 68: The spamd_address main option now supports an optional
2239 timeout value per server.
2241 JH/18 Bug 1581: Router and transport options headers_add/remove can
2242 now have the list separator specified.
2244 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2247 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2250 JH/21 Support for the A6 type of dns record is withdrawn.
2252 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2253 rather than the verbs used.
2255 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2256 from 255 to 1024 chars.
2258 JH/24 Verification callouts now attempt to use TLS by default.
2260 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2261 are generic router options now. The defaults didn't change.
2263 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2264 Original patch from Alexander Shikoff, worked over by JH.
2266 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2267 files if ZCAT_COMMAND is not executable.
2269 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2271 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2273 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2274 Normally benign, it bites when the pair was led to by a CNAME;
2275 modern usage is to not canonicalize the domain to a CNAME target
2276 (and we were inconsistent anyway for A-only vs AAAA+A).
2278 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2280 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2281 when evaluating $sender_host_dnssec.
2283 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2284 $sender_helo_dnssec variable.
2286 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2288 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2290 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2292 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2293 documented as working, but never had. Support all but $spam_report.
2295 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2296 added for tls authenticator.
2298 HS/03 Add perl_taintmode main config option
2304 TL/01 When running the test suite, the README says that variables such as
2305 no_msglog_check are global and can be placed anywhere in a specific
2306 test's script, however it was observed that placement needed to be near
2307 the beginning for it to behave that way. Changed the runtest perl
2308 script to read through the entire script once to detect and set these
2309 variables, reset to the beginning of the script, and then run through
2310 the script parsing/test process like normal.
2312 TL/02 The BSD's have an arc4random API. One of the functions to induce
2313 adding randomness was arc4random_stir(), but it has been removed in
2314 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2315 function when detected.
2317 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2318 cause callback expansion.
2320 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2321 syntax errors in an expansion can be treated as a string instead of
2322 logging or causing an error, due to the internal use of bool_lax
2323 instead of bool when processing it.
2325 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2326 server certificates when making smtp deliveries.
2328 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2330 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2332 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2334 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2335 Merged patch from Sebastian Wiedenroth.
2337 JH/05 Fix results-pipe from transport process. Several recipients, combined
2338 with certificate use, exposed issues where response data items split
2339 over buffer boundaries were not parsed properly. This eventually
2340 resulted in duplicates being sent. This issue only became common enough
2341 to notice due to the introduction of connection certificate information,
2342 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2344 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2345 size buffer was used, resulting in syntax errors when an expansion
2348 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2349 version 3.3.6 or later.
2351 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2352 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2353 both become "event_action", the variables become $event_name, $event_data
2354 and $event_defer_errno. There is a new variable $verify_mode, usable in
2355 routers, transports and related events. The tls:cert event is now also
2356 raised for inbound connections, if the main configuration event_action
2359 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2360 early OCSP support, but no stapling (appears to be less than 1.0.0).
2362 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2363 server certificate names available under the smtp transport option
2364 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2367 JH/10 Time-related extraction expansions from certificates now use the main
2368 option "timezone" setting for output formatting, and are consistent
2369 between OpenSSL and GnuTLS compilations. Bug 1541.
2371 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2372 encoded parameter in the incoming message. Bug 1558.
2374 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2375 include certificate info, eximon was claiming there were spoolfile
2378 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2380 JH/14 Log delivery-related information more consistently, using the sequence
2381 "H=<name> [<ip>]" wherever possible.
2383 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2384 are problematic for Debian distribution, omit them from the release
2387 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2389 JH/16 Fix string representation of time values on 64bit time_t architectures.
2392 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2393 output list separator was used.
2398 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2399 checkers that were complaining about end of non-void function with no
2402 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2403 This was a regression introduced in 4.83 by another bugfix.
2405 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2407 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2408 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2414 TF/01 Correctly close the server side of TLS when forking for delivery.
2416 When a message was received over SMTP with TLS, Exim failed to clear up
2417 the incoming connection properly after forking off the child process to
2418 deliver the message. In some situations the subsequent outgoing
2419 delivery connection happened to have the same fd number as the incoming
2420 connection previously had. Exim would try to use TLS and fail, logging
2421 a "Bad file descriptor" error.
2423 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2424 utilities have not been installed.
2426 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2427 temporary space as the ACL may create new global variables.
2429 TL/01 LDAP support uses per connection or global context settings, depending
2430 upon the detected version of the libraries at build time.
2432 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2433 to extract and use the src ip:port in logging and expansions as if it
2434 were a direct connection from the outside internet. PPv2 support was
2435 updated based on HAProxy spec change in May 2014.
2437 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2439 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2440 Properly escape header and check for NULL return.
2442 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2445 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2447 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2448 characters in header names, implemented as a verify condition.
2449 Contributed by Michael Fischer v. Mollard.
2451 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2452 results permerror and temperror. Previous values are deprecated but
2453 still accepted. In a future release, err_perm and err_temp will be
2454 completely removed, which will be a backward incompatibility if the
2455 ACL tests for either of these two old results. Patch contributed by
2456 user bes-internal on the mailing list.
2458 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2460 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2461 selectors, in both main and reject logs.
2463 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2466 JH/07 Add malware type "sock" for talking to simple daemon.
2468 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2470 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2471 routers/transports under cutthrough routing.
2473 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2474 numbers. Touch up "bool" conditional to keep the same definition.
2476 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2478 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2480 JH/12 Expand items in router/transport headers_add or headers_remove lists
2481 individually rather than the list as a whole. Bug 1452.
2483 Required for reasonable handling of multiple headers_ options when
2484 they may be empty; requires that headers_remove items with embedded
2485 colons must have them doubled (or the list-separator changed).
2487 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2488 view the policy declared in the DMARC record. Currently, $dmarc_status
2489 is a combined value of both the record presence and the result of the
2492 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2494 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2495 dnslookup router and the smtp transport (applying to the forward
2498 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2499 of ldap servers used for a specific lookup. Patch provided by Heiko
2502 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2503 New variable $lookup_dnssec_authenticated for observability.
2505 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2506 Patch submitted by Lars Timman.
2508 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2510 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2511 Requires trusted mode and valid format message id, aborts otherwise.
2512 Patch contributed by Heiko Schlichting.
2514 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2515 certextract with support for various fields. Bug 1358.
2517 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2518 is requested by default, modifiable by smtp transport option
2521 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2522 operate on certificate variables to give certificate fingerprints
2523 Also new ${sha256:cert_variable}.
2525 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2527 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2528 Christian Aistleitner.
2530 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2532 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2533 file. Patch from Wolfgang Breyha.
2535 JH/25 Expand the coverage of the delivery $host and $host_address to
2536 client authenticators run in verify callout. Bug 1476.
2538 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2539 align with daemon_smtp_ports. Bug 72.
2541 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2542 support and error reporting did not work properly.
2544 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2545 and is readable. Patch from Andrew Colin Kissa.
2547 TL/14 Enhance documentation of ${run expansion and how it parses the
2548 commandline after expansion, particularly in the case when an
2549 unquoted variable expansion results in an empty value.
2551 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2553 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2554 by renaming away from it. Addresses GH issue 15, reported by
2557 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2559 TL/15 SECURITY: prevent double expansion in math comparison functions
2560 (can expand unsanitized data). Not remotely exploitable.
2567 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2569 PP/02 Make -n do something, by making it not do something.
2570 When combined with -bP, the name of an option is not output.
2572 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2575 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2576 $sender_host_name and config options to manage this, and basic check
2579 PP/05 DSCP support for outbound connections and control modifier for inbound.
2581 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2582 (Only plugin which currently uses this is kerberos4, which nobody should
2583 be using, but we should make it available and other future plugins might
2584 conceivably use it, even though it would break NAT; stuff *should* be
2585 using channel bindings instead).
2587 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2588 name; added for Sendmail compatibility; requires admin caller.
2589 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2590 just ignore it); requires trusted caller.
2591 Also parse but ignore: -Ac -Am -X<logfile>
2594 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2596 TL/02 Add +smtp_confirmation as a default logging option.
2598 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2599 Patch by Magnus Holmgren from 2007-02-20.
2601 TL/04 Bugzilla 1281 - Spec typo.
2602 Bugzilla 1283 - Spec typo.
2603 Bugzilla 1290 - Spec grammar fixes.
2605 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2607 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2609 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2610 mailing list by by Dmitry Isaikin.
2612 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2614 JH/02 Support "G" suffix to numbers in ${if comparisons.
2616 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2618 NM/01 Bugzilla 1197 - Spec typo
2619 Bugzilla 1196 - Spec examples corrections
2621 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2623 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2624 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2627 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2628 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2630 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2631 "acl {{name}{arg}...}", and optional args on acl condition
2634 JH/05 Permit multiple router/transport headers_add/remove lines.
2636 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2638 JH/07 Avoid using a waiting database for a single-message-only transport.
2639 Performance patch from Paul Fisher. Bugzilla 1262.
2641 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2644 JH/09 Add $headers_added variable, with content from use of ACL modifier
2645 add_header (but not yet added to the message). Bugzilla 199.
2647 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2648 Pulled from Bugzilla 817 by Wolfgang Breyha.
2650 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2652 (nb: this is the same fix as in Exim 4.80.1)
2654 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2657 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2660 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2662 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2663 advertise SMTP AUTH mechanism to us, instead of a generic
2664 protocol violation error. Also, make Exim more robust to bad
2665 data from the Dovecot auth socket.
2667 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2669 When a queue runner is handling a message, Exim first routes the
2670 recipient addresses, during which it prunes them based on the retry
2671 hints database. After that it attempts to deliver the message to
2672 any remaining recipients. It then updates the hints database using
2675 So if a recipient address works intermittently, it can get repeatedly
2676 deferred at routing time. The retry hints record remains fresh so the
2677 address never reaches the final cutoff time.
2679 This is a fairly common occurrence when a user is bumping up against
2680 their storage quota. Exim had some logic in its local delivery code
2681 to deal with this. However it did not apply to per-recipient defers
2682 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2684 This change adds a proper retry rule check during routing so that the
2685 final cutoff time is checked against the message's age. We only do
2686 this check if there is an address retry record and there is not a
2687 domain retry record; this implies that previous attempts to handle
2688 the address had the retry_use_local_parts option turned on. We use
2689 this as an approximation for the destination being like a local
2690 delivery, as in LMTP.
2692 I suspect this new check makes the old local delivery cutoff check
2693 redundant, but I have not verified this so I left the code in place.
2695 TF/02 Correct gecos expansion when From: is a prefix of the username.
2697 Test 0254 submits a message to Exim with the header
2701 When I ran the test suite under the user fanf2, Exim expanded
2702 the header to contain my full name, whereas it should have added
2703 a Resent-Sender: header. It erroneously treats any prefix of the
2704 username as equal to the username.
2706 This change corrects that bug.
2708 GF/01 DCC debug and logging tidyup
2709 Error conditions log to paniclog rather than rejectlog.
2710 Debug lines prefixed by "DCC: " to remove any ambiguity.
2712 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2714 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2715 Bug spotted by Jeremy Harris; was flawed since initial commit.
2716 Would have resulted in OCSP responses post-SNI triggering an Exim
2717 NULL dereference and crash.
2719 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2721 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2722 Bug detection, analysis and fix by Samuel Thibault.
2723 Bugzilla 1331, Debian bug #698092.
2725 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2727 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2728 Server implementation by Todd Lyons, client by JH.
2729 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2730 config variable "prdr_enable" controls whether the server
2731 advertises the facility. If the client requests PRDR a new
2732 acl_data_smtp_prdr ACL is called once for each recipient, after
2733 the body content is received and before the acl_smtp_data ACL.
2734 The client is controlled by both of: a hosts_try_prdr option
2735 on the smtp transport, and the server advertisement.
2736 Default client logging of deliveries and rejections involving
2737 PRDR are flagged with the string "PRDR".
2739 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2740 fclose(). Diagnosis by Todd Lyons.
2742 PP/17 Update configure.default to handle IPv6 localhost better.
2743 Patch by Alain Williams (plus minor tweaks).
2746 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2747 This is now consistent with GnuTLS, and is now documented: the
2748 previous undocumented portable approach to treating the option as
2749 unset was to force an expansion failure. That still works, and
2750 an empty string is now equivalent.
2752 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2753 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2754 not performing validation itself.
2756 PP/20 Added force_command boolean option to pipe transport.
2757 Patch from Nick Koston, of cPanel Inc.
2759 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2762 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2764 PP/21 Fix eximon continuous updating with timestamped log-files.
2765 Broken in a format-string cleanup in 4.80, missed when I repaired the
2766 other false fix of the same issue.
2767 Report and fix from Heiko Schlichting.
2770 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2771 Report from Prashanth Katuri.
2773 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2774 It's SecureTransport, so affects any MacOS clients which use the
2775 system-integrated TLS libraries, including email clients.
2777 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2778 using a MIME ACL for non-SMTP local injection.
2779 Report and assistance in diagnosis by Warren Baker.
2781 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2783 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2785 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2786 last id that failed so it may be referenced in subsequent ACL's.
2788 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2791 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2792 ldap library initialization, allowing self-signed CA's to be
2793 used. Also properly sets require_cert option later in code by
2794 using NULL (global ldap config) instead of ldap handle (per
2795 session). Bug diagnosis and testing by alxgomz.
2797 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2798 the src/util/ subdirectory.
2800 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2801 renamed to Transport Post Delivery Action by Jeremy Harris, as
2804 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2805 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2806 redis_servers = needs to be configured which will be used by the redis
2807 lookup. Patch from Warren Baker, of The Packet Hub.
2809 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2811 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2812 hostname or reverse DNS when processing a host list. Used suggestions
2813 from multiple comments on this bug.
2815 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2817 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2818 Missed a few lines, added it to make the runtest require no keyboard
2821 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2822 contains upper case chars. Make router use caseful_local_part.
2824 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2825 support when GnuTLS has been built with p11-kit.
2831 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2833 This, or similar/improved, will also be change PP/11 of 4.82.
2839 PP/01 Handle short writes when writing local log-files.
2840 In practice, only affects FreeBSD (8 onwards).
2841 Bugzilla 1053, with thanks to Dmitry Isaikin.
2843 NM/01 Bugzilla 949 - Documentation tweak
2845 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2848 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2850 PP/02 Implemented gsasl authenticator.
2852 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2854 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2855 `pkg-config foo` for cflags/libs.
2857 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2858 with rest of GSASL and with heimdal_gssapi.
2860 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2861 `pkg-config foo` for cflags/libs for the TLS implementation.
2863 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2864 properties get this fed in as external SSF. A number of robustness
2865 and debugging improvements to the cyrus_sasl authenticator.
2867 PP/08 cyrus_sasl server now expands the server_realm option.
2869 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2870 Patch by Jeremy Harris.
2872 PP/10 Added dbmjz lookup type.
2874 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2876 PP/12 MAIL args handles TAB as well as SP, for better interop with
2877 non-compliant senders.
2878 Analysis and variant patch by Todd Lyons.
2880 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2881 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2882 Patch from Dirk Mueller <dmueller@suse.com>
2884 PP/13 tls_peerdn now print-escaped for spool files.
2885 Observed some $tls_peerdn in wild which contained \n, which resulted
2886 in spool file corruption.
2888 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2889 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2890 or write after TLS renegotiation, which otherwise led to messages
2893 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2894 as a tracking header (ie: a signed header comes before the signature).
2895 Patch from Wolfgang Breyha.
2897 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2898 comma-sep list; embedded commas doubled.
2900 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2902 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2904 Report and patch from Dmitry Banschikov.
2906 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2907 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2908 failures. We appear to now support TLS1.1+ with Exim.
2910 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2911 lets Exim select keys and certificates based upon TLS SNI from client.
2912 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2913 before an outbound SMTP session. New log_selector, +tls_sni.
2915 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2916 NULL dereference. Report and patch from Alun Jones.
2918 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2919 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2920 Not seeing resolver debug output on NetBSD, but suspect this is a
2921 resolver implementation change.
2923 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2924 Left warnings. Added "eximon gdb" invocation mode.
2926 PP/21 Defaulting "accept_8bitmime" to true, not false.
2928 PP/22 Added -bw for inetd wait mode support.
2930 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2931 locate the relevant includes and libraries. Made this the default.
2933 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2934 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2936 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2937 This may cause build issues on older platforms.
2939 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2940 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2941 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2942 Added SNI support via GnuTLS too.
2943 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2945 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2947 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2948 Applied second patch from Janne, implementing suggestion to default
2949 multiple-strings-in-record handling to match SPF spec.
2951 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2953 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2954 read-only, out of scope).
2955 Patch from Wolfgang Breyha, report from Stuart Northfield.
2957 PP/29 Fix three issues highlighted by clang analyser static analysis.
2958 Only crash-plausible issue would require the Cambridge-specific
2959 iplookup router and a misconfiguration.
2960 Report from Marcin Mirosław.
2962 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2964 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2965 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2966 As part of this, removing so much warning spew let me fix some minor
2967 real issues in debug logging.
2969 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2970 assignment on my part. Fixed.
2972 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2973 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2974 Janne Snabb (who went above and beyond: thank you).
2976 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2977 string otherwise requires a connection and a bunch more work and it's
2978 relatively easy to get wrong. Should also expose TLS library linkage
2981 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2982 64-bit ${eval} (JH/03).
2984 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2985 GNU libc to support some of the 64-bit stuff, should not lead to
2986 conflicts. Defined before os.h is pulled in, so if a given platform
2987 needs to override this, it can.
2989 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2990 protection layer was required, which is not implemented.
2991 Bugzilla 1254, patch from Wolfgang Breyha.
2993 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2994 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2995 tls_dhparam take prime identifiers. Also unbreak combination of
2996 OpenSSL+DH_params+TLSSNI.
2998 PP/39 Disable SSLv2 by default in OpenSSL support.
3004 PP/01 Solaris build fix for Oracle's LDAP libraries.
3005 Bugzilla 1109, patch from Stephen Usher.
3007 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
3009 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
3012 TF/02 Fix a couple more cases where we did not log the error message
3013 when unlink() failed. See also change 4.74-TF/03.
3015 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
3016 lock up or crash if it happened to be inside a call to libc when it
3017 got a SIGUSR1 from exiwhat.
3019 The SIGUSR1 handler appends the current process status to the process
3020 log which is later printed by exiwhat. It used to use the general
3021 purpose logging code to do this, but several functions it calls are
3022 not safe for signals.
3024 The new output code in the SIGUSR1 handler is specific to the process
3025 log, and simple enough that it's easy to inspect for signal safety.
3026 Removing some special cases also simplifies the general logging code.
3027 Removing the spurious timestamps from the process log simplifies
3030 TF/04 Improved ratelimit ACL condition.
3032 The /noupdate option has been deprecated in favour of /readonly which
3033 has clearer semantics. The /leaky, /strict, and /readonly update modes
3034 are mutually exclusive. The update mode is no longer included in the
3035 database key; it just determines when the database is updated. (This
3036 means that when you upgrade Exim will forget old rate measurements.)
3038 Exim now checks that the per_* options are used with an update mode that
3039 makes sense for the current ACL. For example, when Exim is processing a
3040 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
3041 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
3042 must specify per_mail/readonly. If you omit the update mode it defaults to
3043 /leaky where that makes sense (as before) or /readonly where required.
3045 The /noupdate option is now undocumented but still supported for
3046 backwards compatibility. It is equivalent to /readonly except that in
3047 ACLs where /readonly is required you may specify /leaky/noupdate or
3048 /strict/noupdate which are treated the same as /readonly.
3050 A useful new feature is the /count= option. This is a generalization
3051 of the per_byte option, so that you can measure the throughput of other
3052 aggregate values. For example, the per_byte option is now equivalent
3053 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
3055 The per_rcpt option has been generalized using the /count= mechanism
3056 (though it's more complicated than the per_byte equivalence). When it is
3057 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
3058 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
3059 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
3060 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
3061 Note that using per_rcpt with a non-readonly update mode in more than
3062 one ACL will cause the recipients to be double-counted. (The per_mail
3063 and per_byte options don't have this problem.)
3065 The handling of very low rates has changed slightly. If the computed rate
3066 is less than the event's count (usually one) then this event is the first
3067 after a long gap. In this case the rate is set to the same as this event's
3068 count, so that the first message of a spam run is counted properly.
3070 The major new feature is a mechanism for counting the rate of unique
3071 events. The new per_addr option counts the number of different
3072 recipients that someone has sent messages to in the last time period. It
3073 behaves like per_rcpt if all the recipient addresses are different, but
3074 duplicate recipient addresses do not increase the measured rate. Like
3075 the /count= option this is a general mechanism, so the per_addr option
3076 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
3077 example, measure the rate that a client uses different sender addresses
3078 with the options per_mail/unique=$sender_address. There are further
3079 details in the main documentation.
3081 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3083 TF/06 Removed a few PCRE remnants.
3085 TF/07 Automatically extract Exim's version number from tags in the git
3086 repository when doing development or release builds.
3088 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3089 Bugzilla 879. Patch from Paul Fisher.
3091 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3092 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3095 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3097 PP/05 Variable $av_failed, true if the AV scanner deferred.
3098 Bugzilla 1078. Patch from John Horne.
3100 PP/06 Stop make process more reliably on build failure.
3101 Bugzilla 1087. Patch from Heiko Schlittermann.
3103 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3104 Bugzilla 1089. Patch from Heiko Schlittermann.
3106 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3107 Bugzilla 1131. Patch from Holger Weiß.
3109 PP/09 Handle IPv6 addresses with SPF.
3110 Bugzilla 860. Patch from Wolfgang Breyha.
3112 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3114 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3117 PP/11 match_* no longer expand right-hand-side by default.
3118 New compile-time build option, EXPAND_LISTMATCH_RHS.
3119 New expansion conditions, "inlist", "inlisti".
3121 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3123 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3125 PP/14 fix log_write() format string regression from TF/03.
3126 Bugzilla 1152. Patch from Dmitry Isaikin.
3132 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3134 PP/02 Harmonised TLS library version reporting; only show if debugging.
3135 Layout now matches that introduced for other libraries in 4.74 PP/03.
3137 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3139 PP/04 New "dns_use_edns0" global option.
3141 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3144 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3145 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3147 TK/01 Updated PolarSSL code to 0.14.2.
3148 Bugzilla 1097. Patch from Andreas Metzler.
3150 PP/07 Catch divide-by-zero in ${eval:...}.
3151 Fixes bugzilla 1102.
3153 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3156 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3157 format-string attack -- SECURITY: remote arbitrary code execution.
3159 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3160 time unintentionally subject to list matching rules, letting the header
3161 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3162 arbitrary string expansion). This allowed for information disclosure.
3164 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3165 INT_MIN/-1 -- value coerced to INT_MAX.
3171 NM/01 Workaround for PCRE version dependency in version reporting
3174 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3175 This fixes portability to compilers other than gcc, notably
3176 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3178 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3179 makefiles for portability to HP-UX and POSIX correctness.
3181 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3182 Also via indented variable definition in the Makefile.
3183 (Debugging by Oliver Heesakkers).
3185 PP/02 Restore caching of spamd results with expanded spamd_address.
3186 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3188 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3189 Improves build reliability. Fix from: Frank Elsner
3191 NM/02 Fix wide character breakage in the rfc2047 coding
3192 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3194 NM/03 Allow underscore in dnslist lookups
3195 Fixes bug 1026. Patch from Graeme Fowler
3197 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3198 Code patches from Adam Ciarcinski of NetBSD.
3200 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3203 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3204 is logged, to avoid truncation. Patch from John Horne.
3206 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3207 Patch from Jakob Hirsch.
3209 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3210 SQL string expansion failure details.
3211 Patch from Andrey Oktyabrski.
3213 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3214 Patch from Simon Arlott.
3216 PP/09 New lookups functionality failed to compile on old gcc which rejects
3217 extern declarations in function scope.
3218 Patch from Oliver Fleischmann
3220 PP/10 Use sig_atomic_t for flags set from signal handlers.
3221 Check getgroups() return and improve debugging.
3222 Fixed developed for diagnosis in bug 927 (which turned out to be
3225 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3226 Patch from Mark Zealey.
3228 PP/12 Bugzilla 1056: Improved spamd server selection.
3229 Patch from Mark Zealey.
3231 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3232 Based on patch from Heiko Schlittermann.
3234 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3235 Patch from Uwe Doering, sign-off by Michael Haardt.
3237 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3238 variable declaration deep within a block. Bug and patch from
3241 PP/15 lookups-Makefile IRIX compatibility coercion.
3243 PP/16 Make DISABLE_DKIM build knob functional.
3245 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3246 Patch by Simon Arlott
3248 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3249 variable argument macros. Our copy now differs from upstream.
3255 TF/01 Failure to get a lock on a hints database can have serious
3256 consequences so log it to the panic log.
3258 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3259 controlled using the smtp_confirmation log selector.
3261 TF/03 Include the error message when we fail to unlink a spool file.
3263 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3264 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3265 for maintaining out-of-tree patches for some time.
3267 PP/01 Bugzilla 139: Documentation and portability issues.
3268 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3269 Handle per-OS dynamic-module compilation flags.
3271 PP/02 Let /dev/null have normal permissions.
3272 The 4.73 fixes were a little too stringent and complained about the
3273 permissions on /dev/null. Exempt it from some checks.
3274 Reported by Andreas M. Kirchwitz.
3276 PP/03 Report version information for many libraries, including
3277 Exim version information for dynamically loaded libraries. Created
3278 version.h, now support a version extension string for distributors
3279 who patch heavily. Dynamic module ABI change.
3281 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3282 privilege escalation vulnerability whereby the Exim run-time user
3283 can cause root to append content of the attacker's choosing to
3286 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3289 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3290 If dropping privileges for untrusted macros, we disabled normal logging
3291 on the basis that it would fail; for the Exim run-time user, this is not
3292 the case, and it resulted in successful deliveries going unlogged.
3293 Fixed. Reported by Andreas Metzler.
3299 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3300 only prepend for the Resent-* case. Fixes regression introduced in
3301 Exim 4.70 by NM/22 for Bugzilla 607.
3303 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3304 increasing numbers of administrators be bitten by this.
3306 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3308 PP/03 Bugzilla 994: added openssl_options main configuration option.
3310 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3312 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3314 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3316 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3317 without a peer certificate, leading to a segfault because of an
3318 assumption that peers always have certificates. Be a little more
3319 paranoid. Problem reported by Martin Tscholak.
3321 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3322 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3323 NB: ClamAV planning to remove STREAM in "middle of 2010".
3324 CL also introduces -bmalware, various -d+acl logging additions and
3325 more caution in buffer sizes.
3327 PP/09 Implemented reverse_ip expansion operator.
3329 PP/10 Bugzilla 937: provide a "debug" ACL control.
3331 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3333 PP/12 Bugzilla 973: Implement --version.
3335 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3337 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3339 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3341 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3342 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3343 ignore trailing whitespace.
3345 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3347 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3350 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3351 Notification from Dr Andrew Aitchison.
3353 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3354 ExtendedDetectionInfo response format.
3355 Notification from John Horne.
3357 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3360 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3361 XSL and documented dependency on system catalogs, with examples of how
3364 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3367 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3368 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3369 configuration file which is writeable by the Exim user or group.
3371 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3372 of configuration files to cover files specified with the -C option if
3373 they are going to be used with root privileges, not just the default
3376 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3377 option (effectively making it always true).
3379 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3380 files to be used while preserving root privileges.
3382 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3383 that rogue child processes cannot use them.
3385 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3386 run-time user, instead of root.
3388 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3389 Exim run-time user without dropping privileges.
3391 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3392 result string, instead of calling string_vformat() twice with the same
3395 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3396 for other users. Others should always drop root privileges if they use
3397 -C on the command line, even for a whitelisted configure file.
3399 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3401 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3407 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3408 $data_path, and $header_path variables; fixed documentation bugs and
3411 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3412 exipick to access non-standard spools, including the "frozen" queue
3415 NM/01 Bugzilla 965: Support mysql stored procedures.
3416 Patch from Alain Williams
3418 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3420 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3421 Patch from Andreas Metzler
3423 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3424 Patch from Kirill Miazine
3426 NM/05 Bugzilla 671: Added umask to procmail example.
3428 JJ/03 installed exipick 20100323.0, fixing doc bug
3430 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3431 directory. Notification and patch from Dan Rosenberg.
3433 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3435 TK/02 Improve log output when DKIM signing operation fails.
3437 MH/01 Treat the transport option dkim_domain as a colon separated
3438 list, not as a single string, and sign the message with each element,
3439 omitting multiple occurences of the same signer.
3441 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3442 Bugzilla 985, 986. Patch by Simon Arlott
3444 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3445 Patch by Simon Arlott
3447 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3448 MBX locking. Notification from Dan Rosenberg.
3454 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3456 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3458 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3460 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3462 NM/04 Bugzilla 915: Flag broken perl installation during build.
3468 TK/01 Added patch by Johannes Berg that expands the main option
3469 "spamd_address" if it starts with a dollar sign.
3471 TK/02 Write list of recipients to X-Envelope-Sender header when building
3472 the mbox-format spool file for content scanning (suggested by Jakob
3475 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3476 (http://www.dcc-servers.net/) support via dccifd. Activated by
3477 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3479 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3480 by Mark Daniel Reidel <mr@df.eu>.
3482 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3483 When building exim an external PCRE library is now needed -
3484 PCRE is a system library on the majority of modern systems.
3485 See entry on PCRE_LIBS in EDITME file.
3487 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3488 conversation. Added nologin parameter to request.
3489 Patch contributed by Kirill Miazine.
3491 TF/01 Do not log submission mode rewrites if they do not change the address.
3493 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3495 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3496 log files in place. Contributed by Roberto Lima.
3498 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3500 TF/03 Bugzilla 615: When checking the local_parts router precondition
3501 after a local_part_suffix or local_part_prefix option, Exim now
3502 does not use the address's named list lookup cache, since this
3503 contains cached lookups for the whole local part.
3505 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3506 Robert Millan. Documentation is in experimental-spec.txt.
3508 TF/04 Bugzilla 668: Fix parallel build (make -j).
3510 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3512 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3513 Patch provided by Jan Srzednicki.
3515 TF/05 Leading white space used to be stripped from $spam_report which
3516 wrecked the formatting. Now it is preserved.
3518 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3519 that they are available at delivery time.
3521 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3523 TF/08 TLS error reporting now respects the incoming_interface and
3524 incoming_port log selectors.
3526 TF/09 Produce a more useful error message if an SMTP transport's hosts
3527 setting expands to an empty string.
3529 NM/06 Bugzilla 744: EXPN did not work under TLS.
3530 Patch provided by Phil Pennock.
3532 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3533 Patch provided by Richard Godbee.
3535 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3536 acl_smtp_notquit, added index entry.
3538 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3539 Patch provided by Eugene Bujak.
3541 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3542 accept(). Patch provided by Maxim Dounin.
3544 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3545 Patch provided by Phil Pennock.
3547 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3549 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3550 Patch provided by Brad "anomie" Jorsch.
3552 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3553 Patch provided by Dean Brooks.
3555 TK/05 Add native DKIM support (does not depend on external libraries).
3557 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3558 Patch provided by Graeme Fowler.
3560 NM/16 Bugzilla 851: Documentation example syntax fix.
3562 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3564 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3567 NM/19 Bugzilla 745: TLS version reporting.
3568 Patch provided by Phil Pennock.
3570 NM/20 Bugzilla 167: bool: condition support.
3571 Patch provided by Phil Pennock.
3573 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3574 clients. Patch provided by Phil Pennock.
3576 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3577 Patch provided by Brad "anomie" Jorsch.
3579 NM/23 Bugzilla 687: Fix misparses in eximstats.
3580 Patch provided by Heiko Schlittermann.
3582 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3583 Patch provided by Heiko Schlittermann.
3585 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3586 plus update to original patch.
3588 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3590 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3591 Patch provided by David Brownlee.
3593 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3595 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3597 NM/30 Bugzilla 888: TLS documentation bugfixes.
3599 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3601 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3602 Unlike the original bugzilla I have changed all shell scripts in src tree.
3604 NM/33 Bugzilla 898: Transport filter timeout fix.
3605 Patch by Todd Rinaldo.
3607 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3608 Patch by Serge Demonchaux.
3610 NM/35 Bugzilla 39: Base64 decode bug fixes.
3611 Patch by Jakob Hirsch.
3613 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3615 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3617 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3619 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3625 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3626 ALT-N's libdkim that I have put here:
3627 http://duncanthrax.net/exim-experimental/
3629 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3630 were called 'true' and it seems that C99 defines that as a reserved
3631 keyword to be used with 'bool' variable types. That means you could
3632 not include C99-style headers which use bools without triggering
3633 build errors in sieve.c.
3635 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3636 as mailq or other aliases. Changed the --help handling significantly
3637 to do whats expected. exim_usage() emits usage/help information.
3639 SC/01 Added the -bylocaldomain option to eximstats.
3641 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3643 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3645 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3651 PH/01 Another patch from the Sieve maintainer.
3653 PH/02 When an IPv6 address is converted to a string for single-key lookup
3654 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3655 dots are used instead of colons so that keys in lsearch files need not
3656 contain colons. This was done some time before quoting was made available
3657 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3658 (notated using the quote facility) so as to distinguish them from IPv4
3659 keys. This meant that lookups for IP addresses in host lists did not work
3660 for iplsearch lookups.
3662 This has been fixed by arranging for IPv6 addresses to be expressed with
3663 colons if the lookup type is iplsearch. This is not incompatible, because
3664 previously such lookups could never work.
3666 The situation is now rather anomalous, since one *can* have colons in
3667 ordinary lsearch keys. However, making the change in all cases is
3668 incompatible and would probably break a number of configurations.
3670 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3673 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3674 conversion specification without a maximum field width, thereby enabling
3675 a rogue spamd server to cause a buffer overflow. While nobody in their
3676 right mind would setup Exim to query an untrusted spamd server, an
3677 attacker that gains access to a server running spamd could potentially
3678 exploit this vulnerability to run arbitrary code as the Exim user.
3680 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3681 $primary_hostname instead of what libspf2 thinks the hosts name is.
3683 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3684 a directory entry by the name of the lookup key. Previously, if a
3685 symlink pointed to a non-existing file or a file in a directory that
3686 Exim lacked permissions to read, a lookup for a key matching that
3687 symlink would fail. Now it is enough that a matching directory entry
3688 exists, symlink or not. (Bugzilla 503.)
3690 PH/03 The body_linecount and body_zerocount variables are now exported in the
3693 PH/04 Added the $dnslist_matched variable.
3695 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3696 This means they are set thereafter only if the connection becomes
3699 PH/06 Added the client_condition to authenticators so that some can be skipped
3700 by clients under certain conditions.
3702 PH/07 The error message for a badly-placed control=no_multiline_responses left
3703 "_responses" off the end of the name.
3705 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3707 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3708 (without spaces) instead of just copying the configuration text.
3710 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3712 PH/11 Added $max_received_linelength.
3714 PH/12 Added +ignore_defer and +include_defer to host lists.
3716 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3717 way in which PCRE > 7.0 is built.
3719 PH/14 Implemented queue_only_load_latch.
3721 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3722 MAIL command. The effect was to mangle the value on 64-bit systems.
3724 PH/16 Another patch from the Sieve maintainer.
3726 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3728 PH/18 If a system quota error occurred while trying to create the file for
3729 a maildir delivery, the message "Mailbox is full" was not appended to the
3730 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3731 only to a quota excession during the actual writing of the file.
3733 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3734 characters?) which causes problems in log lines. The DN values are now
3735 passed through string_printing() before being added to log lines.
3737 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3738 and InterBase are left for another time.)
3740 PH/21 Added message_body_newlines option.
3742 PH/22 Guard against possible overflow in moan_check_errorcopy().
3744 PH/23 POSIX allows open() to be a macro; guard against that.
3746 PH/24 If the recipient of an error message contained an @ in the local part
3747 (suitably quoted, of course), incorrect values were put in $domain and
3748 $local_part during the evaluation of errors_copy.
3754 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3755 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3758 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3759 issue a MAIL command.
3761 PH/02 In an ACL statement such as
3763 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3765 if a client was not listed at all, or was listed with a value other than
3766 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3767 the condition was not true (as it should be), so access was not denied.
3768 The bug was that the ! inversion was incorrectly passed on to the second
3769 item. This has been fixed.
3771 PH/03 Added additional dnslists conditions == and =& which are different from
3772 = and & when the dns lookup returns more than one IP address.
3774 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3775 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3777 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3778 FSYNC, which compiles an option called disable_fsync that allows for
3779 bypassing fsync(). The documentation is heavily laced with warnings.
3781 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3783 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3784 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3785 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3786 including adding "make clean"; (3) Added -fPIC when compiling the test
3787 dynamically loaded module, to get rid of a warning.
3789 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3790 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3791 = 0s. The bug is otherwise harmless.
3793 PH/07 There was a bug in the dovecot authenticator such that the value of
3794 $auth1 could be overwritten, and so not correctly preserved, after a
3795 successful authentication. This usually meant that the value preserved by
3796 the server_setid option was incorrect.
3798 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3800 PH/09 Installed PCRE release 7.0.
3802 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3803 run for batched SMTP input. It is now run at the start of every message
3804 in the batch. While fixing this I discovered that the process information
3805 (output by running exiwhat) was not always getting set for -bs and -bS
3806 input. This is fixed, and it now also says "batched" for BSMTP.
3808 PH/11 Added control=no_pipelining.
3810 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3811 patch, slightly modified), and move the expansion of helo_data till after
3812 the connection is made in the smtp transport (so it can use these
3815 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3817 PH/14 Added log_selector = +pid.
3819 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3821 PH/16 Add ${if forany and ${if forall.
3823 PH/17 Added dsn_from option to vary the From: line in DSNs.
3825 PH/18 Flush SMTP output before performing a callout, unless control =
3826 no_callout_flush is set.
3828 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3829 was true (the default) a successful delivery failed to delete the retry
3830 item, thus causing premature timeout of the address. The bug is now
3833 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3835 PH/21 Long custom messages for fakedefer and fakereject are now split up
3836 into multiline responses in the same way that messages for "deny" and
3837 other ACL rejections are.
3839 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3840 with slight modification.
3842 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3843 draft, changing the syntax and factoring some duplicate code".
3845 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3846 for deliveries of the second and subsequent messages over the same SMTP
3849 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3850 ${reduce, with only minor "tidies".
3852 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3854 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3855 expansion side effects.
3857 PH/27 When a message times out after an over-quota error from an Exim-imposed
3858 quota, the bounce message says "mailbox is full". This message was not
3859 being given when it was a system quota that was exceeded. It now should
3862 MH/03 Made $recipients available in local_scan(). local_scan() already has
3863 better access to the recipient list through recipients_list[], but
3864 $recipients can be useful in postmaster-provided expansion strings.
3866 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3867 in the case of a MAIL command with additional options following the
3868 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3869 were accidentally chopped off.
3871 PH/29 SMTP synchronization checks are implemented when a command is read -
3872 there is a check that no more input is waiting when there shouldn't be
3873 any. However, for some commands, a delay in an ACL can mean that it is
3874 some time before the response is written. In this time, more input might
3875 arrive, invalidly. So now there are extra checks after an ACL has run for
3876 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3877 pipelining has not been advertised.
3879 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3881 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3882 returned in the SMTP response when smtp_return_error_details was false.
3883 This has been fixed.
3885 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3886 instead of the C I/O that was originally supplied, because problems were
3887 reported on Solaris.
3889 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3890 Exim which did not show up earlier: it was assuming that a call to
3891 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3892 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3893 was a macro that became an assignment, so it seemed to work. This has
3894 changed to a proper function call with a void return, hence the compile
3895 error. Exim's code has been fixed.
3897 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3900 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3902 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3904 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3905 because it turns out to be too big or there is a timeout) there is no
3906 "Completed" line in the log. When some messages of this type were
3907 selected by exigrep, they were listed as "not completed". Others were
3908 picked up by some special patterns. I have improved the selection
3909 criteria to be more general.
3911 PH/38 The host_find_failed option in the manualroute router can now be set
3912 to "ignore", to completely ignore a host whose IP address cannot be
3913 found. If all hosts are ignored, the behaviour is controlled by the new
3914 host_all_ignored option.
3916 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3917 homing or because of multiple MX records with /mx) generated more than
3918 one IP address, and the following item turned out to be the local host,
3919 all the secondary addresses of the first item were incorrectly removed
3920 from the list, along with the local host and any following hosts (which
3921 is what is supposed to happen).
3923 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3924 whoever called Exim into the -H file. In the case of the daemon it was
3925 behaving confusingly. When first started, it used values for whoever
3926 started the daemon, but after a SIGHUP it used the Exim user (because it
3927 calls itself on a restart). I have changed the code so that it now always
3930 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3931 message are rejected with the same error (e.g. no authentication or bad
3932 sender address), and a DATA command is nevertheless sent (as can happen
3933 with PIPELINING or a stupid MUA), the error message that was given to the
3934 RCPT commands is included in the rejection of the DATA command. This is
3935 intended to be helpful for MUAs that show only the final error to their
3938 PH/42 Another patch from the Sieve maintainer.
3940 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3941 Eximstats - Fixed some broken HTML links and added missing column headers
3943 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3944 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3946 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3948 PH/43 Yet another patch from the Sieve maintainer.
3950 PH/44 I found a way to check for a TCP/IP connection going away before sending
3951 the response to the final '.' that terminates a message, but only in the
3952 case where the client has not sent further data following the '.'
3953 (unfortunately, this is allowed). However, in many cases there won't be
3954 any further data because there won't be any more messages to send. A call
3955 to select() can be used: if it shows that the input is "ready", there is
3956 either input waiting, or the socket has been closed. An attempt to read
3957 the next input character can distinguish the two cases. Previously, Exim
3958 would have sent an OK response which the client would never have see.
3959 This could lead to message repetition. This fix should cure that, at
3960 least in a lot of common cases.
3962 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3963 advertised in response to EHLO.
3969 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3970 fixed by 4.65/MH/01 (is this a record?) are fixed:
3972 (i) An empty string was always treated as zero by the numeric comparison
3973 operators. This behaviour has been restored.
3975 (ii) It is documented that the numeric comparison operators always treat
3976 their arguments as decimal numbers. This was broken in that numbers
3977 starting with 0 were being interpreted as octal.
3979 While fixing these problems I realized that there was another issue that
3980 hadn't been noticed. Values of message_size_limit (both the global option
3981 and the transport option) were treated as octal if they started with 0.
3982 The documentation was vague. These values are now always treated as
3983 decimal, and I will make that clear in the documentation.
3989 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3990 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3993 MH/01 Don't check that the operands of numeric comparison operators are
3994 integers when their expansion is in "skipping" mode (fixes bug
3995 introduced by 4.64-PH/07).
3997 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3998 child addresses, Exim now panics and dies. Previously, because the count
3999 is held in a short int, deliveries were likely to be lost. As such a
4000 large number of recipients for a single message is ridiculous
4001 (performance will be very, very poor), I have chosen to impose a limit
4002 rather than extend the field.
4008 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
4009 leftover -K file (the existence of which was triggered by #402).
4010 While we were at it, introduced process PID as part of the -K
4011 filename. This should rule out race conditions when creating
4014 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
4015 processing considerably. Previous code took too long for large mails,
4016 triggering a timeout which in turn triggers #401.
4018 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
4019 in the DK code in transports.c. sendfile() is not really portable,
4020 hence the _LINUX specificness.
4022 TF/01 In the add_headers option to the mail command in an Exim filter,
4023 there was a bug that Exim would claim a syntax error in any
4024 header after the first one which had an odd number of characters
4027 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
4028 callout verification, Exim cached a "reject" for the entire domain. This
4029 is correct for most verifications, but it is not correct for a recipient
4030 verification with use_sender or use_postmaster set, because in that case
4031 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
4032 case of MAIL FROM:<> rejection from other early rejections (e.g.
4033 rejection of HELO). When verifying a recipient using a non-null MAIL
4034 address, the cache is ignored if it shows MAIL FROM:<> rejection.
4035 Whatever the result of the callout, the value of the domain cache is
4036 left unchanged (for any other kind of callout, getting as far as trying
4037 RCPT means that the domain itself is ok).
4039 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
4042 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
4043 manifest itself as EPIPE rather than ECONNECT. When tidying away a
4044 session, the daemon ignores ECONNECT errors and logs others; it now
4045 ignores EPIPE as well.
4047 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
4048 (quoted-printable decoding).
4050 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
4051 later the small subsequent patch to fix an introduced bug.
4053 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
4055 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
4057 PH/08 An error is now given if message_size_limit is specified negative.
4059 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
4060 to be given (somewhat) arbitrary names.
4062 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
4065 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
4066 miscellaneous code fixes
4068 PH/10 Added the log_reject_target ACL modifier to specify where to log
4071 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
4072 hostname. This is wrong, because it relates to the incoming message (and
4073 probably the interface on which it is arriving) and not to the outgoing
4074 callout (which could be using a different interface). This has been
4075 changed to use the value of the helo_data option from the smtp transport
4076 instead - this is what is used when a message is actually being sent. If
4077 there is no remote transport (possible with a router that sets up host
4078 addresses), $smtp_active_hostname is used.
4080 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
4081 tweaks were necessary in order to get it to work (see also 21 below):
4082 (a) The code assumed that strncpy() returns a negative number on buffer
4083 overflow, which isn't the case. Replaced with Exim's string_format()
4085 (b) There were several signed/unsigned issues. I just did the minimum
4086 hacking in of casts. There is scope for a larger refactoring.
4087 (c) The code used strcasecmp() which is not a standard C function.
4088 Replaced with Exim's strcmpic() function.
4089 (d) The code set only $1; it now sets $auth1 as well.
4090 (e) A simple test gave the error "authentication client didn't specify
4091 service in request". It would seem that Dovecot has changed its
4092 interface. Fortunately there's a specification; I followed it and
4093 changed what the client sends and it appears to be working now.
4095 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4098 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4099 address A is aliased to B and C, where B exists and C does not. Without
4100 -v the output is "A verified" because verification stops after a
4101 successful redirection if more than one address is generated. However,
4102 with -v the child addresses are also verified. Exim was outputting "A
4103 failed to verify" and then showing the successful verification for C,
4104 with its parentage. It now outputs "B failed to verify", showing B's
4105 parentage before showing the successful verification of C.
4107 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4108 look up a TXT record in a specific list after matching in a combined
4111 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4112 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4113 they consult the DNS. I had assumed they would set it the way they
4114 wanted; and indeed my experiments on Linux seem to show that in some
4115 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4116 To be on the safe side, however, I have now made the interface to
4117 host_find_byname() similar to host_find_bydns(), with an argument
4118 containing the DNS resolver options. The host_find_byname() function now
4119 sets these options at its start, just as host_find_bydns() does. The smtp
4120 transport options dns_qualify_single and dns_search_parents are passed to
4121 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4122 of host_find_byname() use the default settings of RES_DEFNAMES
4123 (qualify_single) but not RES_DNSRCH (search_parents).
4125 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4126 spool_read_header() do less string testing, by means of a preliminary
4127 switch on the second character of optional "-foo" lines. (This is
4128 overdue, caused by the large number of possibilities that now exist.
4129 Originally there were few.) While I was there, I also converted the
4130 str(n)cmp tests so they don't re-test the leading "-" and the first
4131 character, in the hope this might squeeze out yet more improvement.
4133 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4134 flag allowing group syntax was set by the header_syntax check but not
4135 turned off, possible causing trouble later; (2) The flag was not being
4136 set at all for the header_verify test, causing "group"-style headers to
4137 be rejected. I have now set it in this case, and also caused header_
4138 verify to ignore an empty address taken from a group. While doing this, I
4139 came across some other cases where the code for allowing group syntax
4140 while scanning a header line wasn't quite right (mostly, not resetting
4141 the flag correctly in the right place). These bugs could have caused
4142 trouble for malformed header lines. I hope it is now all correct.
4144 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4145 with the "reply" argument non-NULL. The code, however (which originally
4146 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4147 but it didn't always do it. This confused somebody who was copying the
4148 code for some other use. I have removed all the tests.
4150 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4151 feature that was used to support insecure browsers during the U.S. crypto
4152 embargo. It requires special client support, and Exim is probably the
4153 only MTA that supported it -- and would never use it because real RSA is
4154 always available. This code has been removed, because it had the bad
4155 effect of slowing Exim down by computing (never used) parameters for the
4156 RSA_EXPORT functionality.
4158 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4159 authenticator to fail if there's a tab character in the incoming data
4160 (there should never be unless someone is messing about, as it's supposed
4161 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4162 if the connection is using TLS or if the remote IP is the same as the
4163 local IP, and the "valid-client-cert option" if a client certificate has
4166 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4167 authenticators. This can be used for authorization after authentication
4168 succeeds. (In the case of plaintext, it servers for both authentication
4171 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4172 if any retry times were supplied.
4174 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4175 connection, where there is no client IP address to check. In this
4176 situation, the verify now always succeeds.
4178 PH/25 Applied John Jetmore's -Mset patch.
4180 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4182 PH/27 In a string expansion for a processed (not raw) header when multiple
4183 headers of the same name were present, leading whitespace was being
4184 removed from all of them, but trailing whitespace was being removed only
4185 from the last one. Now trailing whitespace is removed from each header
4186 before concatenation. Completely empty headers in a concatenation (as
4187 before) are ignored.
4189 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4190 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4192 PH/29 [Removed. This was a change that I later backed out, and forgot to
4193 correct the ChangeLog entry (that I had efficiently created) before
4194 committing the later change.]
4196 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4197 address errors (4xx response to RCPT) over the same connection as other
4198 messages routed to the same hosts. Such deliveries are always "forced",
4199 so retry times are not inspected. This resulted in far too many retries
4200 for the affected addresses. The effect occurred only when there were more
4201 hosts than the hosts_max_try setting in the smtp transport when it had
4202 the 4xx errors. Those hosts that it had tried were not added to the list
4203 of hosts for which the message was waiting, so if all were tried, there
4204 was no problem. Two fixes have been applied:
4206 (i) If there are any address or message errors in an SMTP delivery, none
4207 of the hosts (tried or untried) are now added to the list of hosts
4208 for which the message is waiting, so the message should not be a
4209 candidate for sending over the same connection that was used for a
4210 successful delivery of some other message. This seems entirely
4211 reasonable: after all the message is NOT "waiting for some host".
4212 This is so "obvious" that I'm not sure why it wasn't done
4213 previously. Hope I haven't missed anything, but it can't do any
4214 harm, as the worst effect is to miss an optimization.
4216 (ii) If, despite (i), such a delivery is accidentally attempted, the
4217 routing retry time is respected, so at least it doesn't keep
4218 hammering the server.
4220 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4221 in ${readsocket because some servers need this prod.
4223 PH/32 Added some extra debug output when updating a wait-xxx database.
4225 PH/33 The hint "could be header name not terminated by colon", which has been
4226 given for certain expansion errors for a long time, was not being given
4227 for the ${if def:h_colon_omitted{... case.
4229 PH/34 The spec says: "With one important exception, whenever a domain list is
4230 being scanned, $domain contains the subject domain." There was at least
4231 one case where this was not true.
4233 PH/35 The error "getsockname() failed: connection reset by peer" was being
4234 written to the panic log as well as the main log, but it isn't really
4235 panic-worthy as it just means the connection died rather early on. I have
4236 removed the panic log writing for the ECONNRESET error when getsockname()
4239 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4240 runs only) independently of the message's sender address. This meant
4241 that, if the 4xx error was in fact related to the sender, a different
4242 message to the same recipient with a different sender could confuse
4243 things. In particular, this can happen when sending to a greylisting
4244 server, but other circumstances could also provoke similar problems.
4245 I have changed the default so that the retry time for these errors is now
4246 based a combination of the sender and recipient addresses. This change
4247 can be overridden by setting address_retry_include_sender=false in the
4250 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4251 remote server are returned as part of bounce messages. This was not
4252 happening for LMTP over a pipe (the lmtp transport), but now it is the
4253 same for both kinds of LMTP.
4255 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4256 in header lines that were in fact CNAMEs. This is no longer the case.
4258 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4259 and queue runs started by the daemon processed all messages. This has
4260 been fixed so that -R and -S can now usefully be given with -q<time>.
4262 PH/40 Import PCRE release 6.7 (fixes some bugs).
4264 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4266 PH/42 Give an error if -q is specified more than once.
4268 PH/43 Renamed the variables $interface_address and $interface_port as
4269 $received_ip_address and $received_port, to make it clear that these
4270 values apply to message reception, and not to the outgoing interface when
4271 a message is delivered. (The old names remain recognized, of course.)
4273 PH/44 There was no timeout on the connect() call when using a Unix domain
4274 socket in the ${readsocket expansion. There now is.
4276 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4277 be meaningful with "accept".
4279 SC/01 Eximstats V1.43
4280 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4282 SC/02 Eximstats V1.44
4283 Use a glob alias rather than an array ref in the generated
4284 parser. This improves both readability and performance.
4286 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4287 Collect SpamAssassin and rejection statistics.
4288 Don't display local sender or destination tables unless
4289 there is data to show.
4290 Added average volumes into the top table text output.
4292 SC/04 Eximstats V1.46
4293 Collect data on the number of addresses (recipients)
4294 as well as the number of messages.
4296 SC/05 Eximstats V1.47
4297 Added 'Message too big' to the list of mail rejection
4298 reasons (thanks to Marco Gaiarin).
4300 SC/06 Eximstats V1.48
4301 Mainlog lines which have GMT offsets and are too short to
4302 have a flag are now skipped.
4304 SC/07 Eximstats V1.49 (Alain Williams)
4305 Added the -emptyok flag.
4307 SC/08 Eximstats V1.50
4308 Fixes for obtaining the IP address from reject messages.
4310 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4311 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4312 whitespace changes from 4.64-PH/27
4314 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4317 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4318 are found, allow negative numbers in numeric criteria)
4320 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4322 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4323 to match changes made in 4.64-PH/43
4325 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4327 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4328 "domain" is actually an IP address, and force a failure. This locks out
4329 those revolvers/nameservers that support "A-for-A" lookups, in
4330 contravention of the specifications.
4332 PH/48 When a host name was looked up from an IP address, and the subsequent
4333 forward lookup of the name timed out, the host name was left in
4334 $sender_host_name, contrary to the specification.
4336 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4337 restricted to single-key lookups, Exim was not diagnosing an error if
4338 * or *@ was used with a query-style lookup.
4340 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4342 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4343 long ago, but noone interested enough thought of it. Let's just say that
4344 the "1.1" means that there are some new functions that weren't there at
4345 some point in the past.
4347 PH/51 Error processing for expansion failure of helo_data from an smtp
4348 transport during callout processing was broken.
4350 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4351 tested/used via the -bh/-bhc/-bs options.
4353 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4354 bug, fixed in subsequent PCRE releases).
4356 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4357 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4359 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4365 SC/01 Use a glob alias rather than an array ref in eximstats generated
4366 parser. This improves both readability and performance.
4368 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4369 Don't display local sender or destination tables in eximstats unless
4370 there is data to show.
4371 Added average volumes into the eximstats top table text output.
4373 SC/03 Collect data on the number of addresses (recipients) as well
4374 as the number of messages in eximstats.
4376 TF/01 Correct an error in the documentation for the redirect router. Exim
4377 does (usually) call initgroups() when daemonizing.
4379 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4380 with consistent privilege compared to when running as a daemon.
4382 TF/03 Note in the spec that $authenticated_id is not set for local
4383 submissions from trusted users.
4385 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4386 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4388 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4389 by adding some example configuration directives to the default
4390 configuration file. A little bit of work is required to uncomment the
4391 directives and define how usernames and passwords are checked, but
4392 there is now a framework to start from.
4394 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4395 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4396 without this. I don't know how relevant this is to other LDAP libraries.
4398 PH/02 Add the verb name to the "unknown ACL verb" error.
4400 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4402 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4404 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4405 directory not expanded when it should be if an expanded home directory
4406 was set for the address (which is overridden by the transport).
4408 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4411 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4412 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4413 because it is too late at that time, and has no effect.
4415 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4416 security issue with \' (bugzilla #107). I could not use the
4417 PQescapeStringConn() function, because it needs a PGconn value as one of
4420 PH/08 When testing addresses using -bt, indicate those final addresses that
4421 are duplicates that would not cause an additional delivery. At least one
4422 person was confused, thinking that -bt output corresponded to deliveries.
4423 (Suppressing duplicates isn't a good idea as you lose the information
4424 about possibly different redirections that led to the duplicates.)
4426 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4427 systems where poll() doesn't work, in particular OS X.
4429 PH/10 Added more information to debugging output for retry time not reached.
4431 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4432 operations in malware.c.
4434 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4437 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4438 syslog_duplication set false, log lines that would normally be written
4439 both the the main log and to the reject log were not written to syslog at
4442 PH/14 In the default configuration, change the use of "message" in ACL warn
4443 statements to "add_header".
4445 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4446 not followed by a command (e.g. "seen endif").
4448 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4449 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4452 PH/17 Added extra conditions to the default value of delay_warning_condition
4456 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4457 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4458 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4461 The Auto-Submitted: and various List- headers are standardised, whereas I
4462 don't think Precedence: ever was.
4464 PH/18 Refactored debugging code in route_finduser() to show more information,
4465 in particular, the error code if getpwnam() issues one.
4467 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4468 This is apparently needed in addition to the PH/07 change above to avoid
4469 any possible encoding problems.
4471 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4472 but not after initializing Perl.
4474 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4475 output them only if debugging. By default they are written stderr,
4476 apparently, which is not desirable.
4478 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4481 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4484 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4486 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4487 authenticated or an ident call has been made. Suppress the default
4488 values for $authenticated_id and $authenticated_sender (but permit -oMai
4489 and -oMas) when testing with -bh.
4491 PH/24 Re-jigged the order of the tests in the default configuration so that the
4492 tests for valid domains and recipients precede the DNS black list and CSA
4493 tests, on the grounds that those ones are more expensive.
4495 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4496 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4497 This bug exists in every version of Exim that I still have, right back to
4500 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4501 However, an attempt to turn on case-sensitivity in a regex key by
4502 including (?-i) didn't work because the subject string was already
4503 lowercased, and the effects were non-intuitive. It turns out that a
4504 one-line patch can be used to allow (?-i) to work as expected.
4510 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4511 other effects) broke the use of negated acl sub-conditions.
4513 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4516 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4517 "Deny" causes Exim to reject the incoming connection with a 554 error.
4518 Unfortunately, if there is a major crisis, such as a disk failure,
4519 tcp-wrappers gives "deny", whereas what one would like would be some
4520 kind of temporary error. A kludge has been added to help with this.
4521 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4522 554 error is used if errno is still zero or contains ENOENT (which occurs
4523 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4526 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4528 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4529 errors. Otherwise a message that provokes a temporary error (when other
4530 messages do not) can cause a whole host to time out.
4532 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4533 addresses were routed directly to files or pipes from a redirect router.
4534 File deliveries just didn't batch; pipe deliveries might have suffered
4537 PH/06 A failure to get a lock for a hints database would erroneously always say
4538 "Failed to get write lock", even when it was really a read lock.
4540 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4541 of 0600. This has been changed to use the value of the lockfile_mode
4542 option (which defaults to 0600).
4544 PH/08 Applied small patch from the Sieve maintainer.
4546 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4547 folder from quota calculations, a direct delivery into this folder messed
4548 up the contents of the maildirsize file. This was because the regex was
4549 used only to exclude .Trash (or whatever) when the size of the mailbox
4550 was calculated. There was no check that a delivery was happening into an
4551 excluded directory. This bug has been fixed by ignoring all quota
4552 processing for deliveries into excluded directories.
4554 PH/10 Added the maildirfolder_create_regex option to appendfile.
4560 PH/01 The code for finding all the local interface addresses on a FreeBSD
4561 system running IPv6 was broken. This may well have applied to all BSD
4562 systems, as well as to others that have similar system calls. The broken
4563 code found IPv4 interfaces correctly, but gave incorrect values for the
4564 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4565 that it would not match correctly against @[] and not recognize the IPv6
4568 PH/02 The ipliteral router was not recognizing addresses of the form user@
4569 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4571 PH/03 Added disable_ipv6.
4573 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4574 decoded form, because it is most often used to construct To: headers
4575 lines in autoreplies, and the decoded form may well be syntactically
4576 invalid. However, $reply_address has leading white space removed, and all
4577 newlines turned into spaces so that the autoreply transport does not
4580 PH/05 If group was specified without a user on a router, and no group or user
4581 was specified on a transport, the group from the router was ignored.
4583 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4584 for visible compile-time settings that can be used to change these
4585 numbers, for those that want even more. Backwards compatibility with old
4586 spool files has been maintained. However, going back to a previous Exim
4587 release will lost any variables that are in spool files.
4589 PH/07 Two small changes when running in the test harness: increase delay when
4590 passing a TCP/IP connection to a new process, in case the original
4591 process has to generate a bounce, and remove special handling of
4592 127.0.0.2 (sic), which is no longer necessary.
4594 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4595 be the same on different OS.
4597 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4600 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4601 whether --show-vars was specified or not
4603 JJ/02 exipick: Added support for new ACL variable spool format introduced
4606 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4607 syntactically invalid From: or Reply-to: line, and a filter used this to
4608 generate an autoreply, and therefore failed to obtain an address for the
4609 autoreply, Exim could try to deliver to a non-existent relative file
4610 name, causing unrelated and misleading errors. What now happens is that
4611 it logs this as a hard delivery error, but does not attempt to create a
4614 PH/11 The exinext utility has a -C option for testing purposes, but although
4615 the given file was scanned by exinext itself; it wasn't being passed on
4616 when Exim was called.
4618 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4619 an end-of-file indication when reading a command response.
4621 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4622 compiled. In many other places in Exim, IPv6 addresses are always
4623 recognized, so I have changed this. It also means that IPv4 domain
4624 literals of the form [IPV4:n.n.n.n] are now always recognized.
4626 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4627 used if the router is not running as root, for example, when verifying at
4628 ACL time, or when using -bh. The debugging output from this situation was
4629 non-existent - all you got was a failure to exec. I have made two
4632 (a) Failures to set uid/gid, the current directory, or a process leader
4633 in a subprocess such as that created by queryprogram now generate
4634 suitable debugging output when -d is set.
4636 (b) The queryprogram router detects when it is not running as root,
4637 outputs suitable debugging information if -d is set, and then runs
4638 the subprocess without attempting to change uid/gid.
4640 PH/15 Minor change to Makefile for building test_host (undocumented testing
4643 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4644 additional section of a DNS packet that returns MX or SRV records.
4645 Instead, it always explicitly searches for A/AAAA records. This avoids
4646 major problems that occur when a DNS server includes only records of one
4647 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4648 fixed another bug: if SRV records were looked up and the corresponding
4649 address records were *not* found in the additional section, the port
4650 values from the SRV records were lost.
4652 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4653 using the correct key (the original address) when searching the retry
4654 rules in order to find which one to use for generating the retry hint.
4656 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4657 adding the default one. Similarly, if it contains a Reply-To: header, the
4658 errors_reply_to option, if set, is not used.
4660 PH/19 When calculating a retry time, Exim used to measure the "time since
4661 failure" by looking at the "first failed" field in the retry record. Now
4662 it does not use this if it is later than than the arrival time of the
4663 message. Instead it uses the arrival time. This makes for better
4664 behaviour in cases where some deliveries succeed, thus re-setting the
4665 "first failed" field. An example is a quota failure for a huge message
4666 when small messages continue to be delivered. Without this change, the
4667 "time since failure" will always be short, possible causing more frequent
4668 delivery attempts for the huge message than are intended.
4669 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4671 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4672 $1, $2, $3) because the numerical variables can be reset during some
4673 expansion items (e.g. "match"), thereby losing the authentication data.
4675 PH/21 Make -bV show the size of off_t variables so that the test suite can
4676 decide whether to run tests for quotas > 2G.
4678 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4679 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4680 filecount value is greater than 2G or if a quota value is greater than 2G
4681 on a system where the size of off_t is not greater than 4, a panic error
4684 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4685 never match. The debug and -bh output now contains an explicit error
4686 message indicating a malformed IPv4 address or mask.
4688 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4689 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4690 PH/23 above applies.
4692 PH/25 Do not write to syslog when running in the test harness. The only
4693 occasion when this arises is a failure to open the main or panic logs
4694 (for which there is an explicit test).
4696 PH/26 Added the /no_tell option to "control=freeze".
4698 PH/27 If a host name lookup failed very early in a connection, for example, if
4699 the IP address matched host_lookup and the reverse lookup yielded a name
4700 that did not have a forward lookup, an error message of the form "no IP
4701 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4702 could be logged. Now it outputs the IP address instead of "NULL".
4704 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4705 allows the sender and the authenticated sender to be set when
4706 submitting a message from within Exim. Since child_open_exim() is
4707 documented for local_scan(), the new function should be too.
4709 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4710 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4711 results in an empty string is now treated as unset.
4713 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4715 PH/31 Added sender_verify_fail logging option.
4717 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4718 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4719 tidied the source and removed it altogether.
4721 PH/33 When a queue run was abandoned because the load average was too high, a
4722 log line was always written; now it is written only if the queue_run log
4723 selector is set. In addition, the log line for abandonment now contains
4724 information about the queue run such as the pid. This is always present
4725 in "start" and "stop" lines but was omitted from the "abandon" line.
4727 PH/34 Omit spaces between a header name and the colon in the error message that
4728 is given when verify = headers_syntax fails (if there are lots of them,
4729 the message gets confusing).
4731 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4732 names, as there are now some PTR records that contain slashes. This check
4733 is only to protect against broken name servers that fall over on strange
4734 characters, so the fact that it applies to all lookups doesn't matter.
4736 PH/36 Now that the new test suite is complete, we can remove some of the
4737 special code in Exim that was needed for the old test suite. For example,
4738 sorting DNS records because real resolvers return them in an arbitrary
4739 order. The new test suite's fake resolver always returns records in the
4742 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4743 bounces) except when queue_only is set, to avoid logging races between
4744 the different processes.
4746 PH/38 Panic-die if .include specifies a non-absolute path.
4748 PH/39 A tweak to the "H" retry rule from its user.
4750 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4751 a label. They prevented compilation on older perls.
4753 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4754 a warning to be raised on newish perls.
4756 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4757 on queue. Changes to match documented behaviour of showing count of
4758 messages matching specified criteria.
4760 PH/40 Changed the default ident timeout from 30s to 5s.
4762 PH/41 Added support for the use of login_cap features, on those BSD systems
4763 that have them, for controlling the resources used by pipe deliveries.
4765 PH/42 The content-scanning code uses fopen() to create files in which to put
4766 message data. Previously it was not paying any attention to the mode of
4767 the files. Exim runs with umask(0) because the rest of the code creates
4768 files with open(), and sets the required mode explicitly. Thus, these
4769 files were ending up world-writeable. This was not a big issue, because,
4770 being within the spool directory, they were not world-accessible. I have
4771 created a function called modefopen, which takes an additional mode
4772 argument. It sets umask(777), creates the file, chmods it to the required
4773 mode, then resets the umask. All the relevant calls to fopen() in the
4774 content scanning code have been changed to use this function.
4776 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4777 to 24 hours. This avoids potential overflow problems when processing G
4778 and H retry rules. I suspect nobody ever tinkers with this value.
4780 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4782 PH/45 When the plaintext authenticator is running as a client, the server's
4783 challenges are checked to ensure they are valid base64 strings. By
4784 default, the authentication attempt is cancelled if an invalid string is
4785 received. Setting client_ignore_invalid_base64 true ignores these errors.
4786 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4787 they are received. Thus, the responses can be made to depend on the
4788 challenges. If an invalid string is ignored, an empty string is placed in
4791 PH/46 Messages that are created by the autoreply transport now contains a
4792 References: header, in accordance with RFCs 2822 and 3834.
4794 PH/47 Added authenticated_sender_force to the smtp transport.
4796 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4798 PH/49 Installed latest patch from the Sieve maintainer.
4800 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4801 was also set, the appendfile transport was unnecessarily scanning a
4802 directory of message files (e.g. for maildir delivery) to find the count
4803 of files (along with the size), even though it did not need this
4804 information. It now does the scan only if it needs to find either the
4805 size of the count of files.
4807 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4809 PH/52 Two bugs concerned with error handling when the smtp transport is
4812 (i) Exim was not creating retry information for temporary errors given
4813 for individual recipients after the DATA command when the smtp transport
4814 was used in LMTP mode. This meant that they could be retried too
4815 frequently, and not timed out correctly.
4817 (ii) Exim was setting the flag that allows error details to be returned
4818 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4819 recipients that were returned after the DATA command.
4821 PH/53 This is related to PH/52, but is more general: for any failing address,
4822 when detailed error information was permitted to be returned to the
4823 sender, but the error was temporary, then after the final timeout, only
4824 "retry timeout exceeded" was returned. Now it returns the full error as
4825 well as "retry timeout exceeded".
4827 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4828 do this, and (what is worse) MTAs that accept it.
4830 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4831 will now be deprecated.
4833 PH/56 New os.c-cygwin from the Cygwin maintainer.
4835 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4836 formats (previously only available in exim formats via -bpr, -bpru,
4837 and -bpra. Now also available in native and exiqgrep formats)
4839 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4840 with very large, slow to parse queues
4842 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4844 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4846 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4847 responses to authentication challenges, though it was showing the
4848 challenges; (ii) I've removed the CR characters from the debug output for
4851 PH/58 Allow for the insertion of a newline as well as a space when a string
4852 is turned into more than one encoded-word during RFC 2047 encoding. The
4853 Sieve code now uses this.
4855 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4856 data_4xx, lost_connection, tls_required.
4858 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4859 message was being sent as an SMTP response.
4861 PH/61 Add -l and -k options to exicyclog.
4863 PH/62 When verifying, if an address was redirected to one new address, so that
4864 verification continued, and the new address failed or deferred after
4865 having set something in $address_data, the value of $address_data was not
4866 passed back to the ACL. This was different to the case when no
4867 redirection occurred. The value is now passed back in both cases.
4869 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4870 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4871 use login_cap.h, so on its own it isn't the distinguishing feature. The
4872 new name refers directly to the setclassresources() function.
4874 PH/65 Added configuration files for NetBSD3.
4876 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4878 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4879 is preferred over IPv4.
4881 PH/68 The bounce_return_message and bounce_return_body options were not being
4882 honoured for bounces generated during the reception of non-SMTP messages.
4883 In particular, this applied to messages rejected by the ACL. This bug has
4884 been fixed. However, if bounce_return_message is true and bounce_return_
4885 body is false, the headers that are returned for a non-SMTP message
4886 include only those that have been read before the error was detected.
4887 (In the case of an ACL rejection, they have all been read.)
4889 PH/69 The HTML version of the specification is now built in a directory called
4890 spec_html instead of spec.html, because the latter looks like a path with
4891 a MIME-type, and this confuses some software.
4893 PH/70 Catch two compiler warnings in sieve.c.
4895 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4896 function verify_get_ident() calls ip_connect() to connect a socket, but
4897 if the "connect()" function timed out, ip_connect() used to close the
4898 socket. However, verify_get_ident() also closes the socket later, and in
4899 between Exim writes to the log, which may get opened at this point. When
4900 the socket was closed in ip_connect(), the log could get the same file
4901 descriptor number as the socket. This naturally causes chaos. The fix is
4902 not to close the socket in ip_connect(); the socket should be closed by
4903 the function that creates it. There was only one place in the code where
4904 this was missing, in the iplookup router, which I don't think anybody now
4905 uses, but I've fixed it anyway.
4907 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4908 well as to direct DNS lookups. Otherwise the handling of names in host
4909 lists is inconsistent and therefore confusing.
4915 PH/01 Two changes to the default runtime configuration:
4917 (1) Move the checks for relay_from_hosts and authenticated clients from
4918 after to before the (commented out) DNS black list checks.
4920 (2) Add control=submission to the relay_from_hosts and authenticated
4921 clients checks, on the grounds that messages accepted by these
4922 statements are most likely to be submissions.
4924 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4926 (1) Generate an error if the third argument for the ${prvs expansion is
4929 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4932 (3) Reset the variables that are obtained from the first argument of
4933 ${prvscheck and used in the second argument before leaving the code,
4934 because their memory is reclaimed, so using them afterwards may do
4937 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4938 one (it's much easier than Tom thought :-).
4940 (5) Because of (4), we can now allow for the use of $prvscheck_result
4941 inside the third argument.
4943 PH/03 For some reason, the default setting of PATH when running a command from
4944 a pipe transport was just "/usr/bin". I have changed it to
4947 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4948 anything to be listed in the output from -bV.
4950 PH/05 When a filter generated an autoreply, the entire To: header line was
4951 quoted in the delivery log line, like this:
4953 => >A.N.Other <ano@some.domain> <original@ddress> ...
4955 This has been changed so that it extracts the operative address. There
4956 may be more than one such address. If so, they are comma-separated, like
4959 => >ano@some.domain,ona@other.domain <original@ddress> ...
4961 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4962 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4963 not being looked up in the rDNS to get a host name, Exim was showing the
4964 IP address twice in Received: lines, even though the IP addresses were
4965 identical. For example:
4967 Received: from [1.2.3.4] (helo=[1.2.3.4])
4969 However, if the real host name was known, it was omitting the HELO data
4970 if it matched the actual IP address. This has been tidied up so that it
4971 doesn't show the same IP address twice.
4973 PH/07 When both +timestamp and +memory debugging was on, the value given by
4974 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4975 called by the debug printing, thereby overwriting the timestamp buffer.
4976 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4978 PH/08 When the original message was included in an autoreply transport, it
4979 always said "this is a copy of the message, including all the headers",
4980 even if body_only or headers_only was set. It now gives an appropriate
4983 PH/09 Applied a patch from the Sieve maintainer which:
4985 o fixes some comments
4986 o adds the (disabled) notify extension core
4987 o adds some debug output for the result of if/elsif tests
4988 o points to the current vacation draft in the documentation
4989 and documents the missing references header update
4993 o fixes a bug in processing the envelope test (when testing
4994 multiple envelope elements, the last element determined the
4997 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4998 Electronic Mail") by including:
5000 Auto-submitted: auto-generated
5002 in the messages that it generates (bounce messages and others, such as
5003 warnings). In the case of bounce messages for non-SMTP messages, there was
5004 also a typo: it was using "Auto_submitted" (underscore instead of
5005 hyphen). Since every message generated by Exim is necessarily in response
5006 to another message, thes have all been changed to:
5008 Auto-Submitted: auto-replied
5010 in accordance with these statements in the RFC:
5012 The auto-replied keyword:
5014 - SHOULD be used on messages sent in direct response to another
5015 message by an automatic process,
5017 - MUST NOT be used on manually-generated messages,
5019 - MAY be used on Delivery Status Notifications (DSNs) and Message
5020 Disposition Notifications (MDNs),
5022 - MUST NOT be used on messages generated by automatic or periodic
5023 processes, except for messages which are automatic responses to
5026 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
5027 to the default Received: header definition.
5029 PH/12 Added log selector acl_warn_skipped (default on).
5031 PH/13 After a successful wildlsearch lookup, discard the values of numeric
5032 variables because (a) they are in the wrong storage pool and (b) even if
5033 they were copied, it wouldn't work properly because of the caching.
5035 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
5036 checking when decoding. Apparently there are clients that generate
5037 overlong encoded strings. Why am I not surprised?
5039 PH/15 If the first argument of "${if match_address" was not empty, but did not
5040 contain an "@" character, Exim crashed. Now it writes a panic log message
5041 and treats the condition as false.
5043 PH/16 In autoreply, treat an empty string for "once" the same as unset.
5045 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
5046 extension "envelope-auth". The code is finished and in agreement with
5047 other implementations, but there is no documentation so far and in fact,
5048 nobody wrote the draft yet. This extension is currently #undef'ed, thus
5049 not changing the active code.
5051 Print executed "if" and "elsif" statements when debugging is used. This
5052 helps a great deal to understand what a filter does.
5054 Document more things not specified clearly in RFC3028. I had all this
5055 sorted out, when out of a sudden new issues came to my mind. Oops."
5057 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
5060 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
5061 canonical form (as documented). However, after a host name lookup from
5062 the IP address, check_host() was doing a simple string comparison with
5063 addresses acquired from the DNS when checking that the found name did
5064 have the original IP as one of its addresses. Since any found IPv6
5065 addresses are likely to be in abbreviated form, the comparison could
5066 fail. Luckily, there already exists a function for doing the comparison
5067 by converting both addresses to binary, so now that is used instead of
5068 the text comparison.
5070 PH/20 There was another similar case to PH/19, when a complete host name was
5071 given in a host list; looking up its IP address could give an abbreviated
5072 form, whereas the current host's name might or might not be abbreviated.
5073 The same fix has been applied.
5079 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
5080 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5083 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5084 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5086 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5088 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5089 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5090 Also, for "Auto-Submitted", treat anything other than "no" as
5091 non-personal, in accordance with RFC 3834. (Previously it treated
5092 anything starting "auto-" as non-personal.)
5094 TF/01 The control=submission/name=... option had a problem with syntax
5095 errors if the name included a slash character. The /name= option
5096 now slurps the rest of the string, so it can include any characters
5097 but it must come last in the list of options (after /sender_retain
5100 PH/05 Some modifications to the interface to the fake nameserver for the new
5108 TK/01 Added the "success_on_redirect" address verification option. See
5109 NewStuff for rationale and an example.
5111 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5113 PH/02 Patch to exigrep to allow it to work on syslog lines.
5115 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5116 fread() to skip over the body file's header line, because in Cygwin the
5117 header line is locked and is inaccessible.
5119 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5120 co-exist for some time) to make it clear that it is the Exim ID that is
5121 referenced, not the Message-ID: header line.
5123 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5124 string_format() function, because snprintf() does not exist on all
5127 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5128 ${stat: expansion item.
5130 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5131 protocol synchronization error", to keep the pedants happy.
5133 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5134 well as for IRIX systems, when gcc is being used. See the host.c source
5137 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5139 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5142 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5143 transport and to the smtp transport in LMTP mode.
5145 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5147 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5148 run a filter in a subprocess. This could lead to confusion in subsequent
5149 lookups in the parent process. There should also be a search_tidyup() at
5150 the end of the subprocess.
5152 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5153 only if the host matched helo_try_verify_hosts, which caused the
5154 verification to occur when the EHLO/HELO command was issued. The ACL just
5155 tested the remembered result. Now, if a previous verification attempt has
5156 not happened, "verify = helo" does it there and then.
5158 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5160 TK/03 Fix log output including CR from clamd.
5162 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5163 exist provoked a memory error which could cause a segfault.
5165 PH/15 Installed PCRE 6.2
5167 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5169 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5170 of the problem. Specifically, suggested +O2 rather than +O1 for the
5173 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5175 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5176 record, the port was not correctly logged when the outgoing_port log
5177 selector was set (it logged the transort's default port).
5179 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5180 fallback_hosts, and "hosts" in the smtp transport.
5182 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5183 host errors such as "Connection refused".
5185 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5186 authentication with radiusclient 0.4.9:
5188 - Error returned from rc_read_config was caught wrongly
5189 - Username/password not passed on to radius server due to wrong length.
5191 The presumption is that some radiusclient API changes for 4.51/PH/17
5192 were not taken care of correctly. The code is still untested by me (my
5193 Linux distribution still has 0.3.2 of radiusclient), but it was
5194 contributed by a Radius user.
5196 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5197 expanding the "port" option of the smtp transport.
5199 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5200 while reading a MIME header. Thanks to Tom Hughes for a patch.
5202 PH/24 Include config.h inside local_scan.h so that configuration settings are
5205 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5206 that in an ACL for RCPT (for example), you can examine exactly what was
5209 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5210 commands, but it was not correctly comparing the address with the actual
5211 client host address. Thus, it would show the EHLO address in Received:
5212 header lines when this was not necessary.
5214 PH/27 Added the % operator to ${eval:}.
5216 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5217 it should be ignoring failures (because with -C, for example, it has lost
5218 privilege). It wasn't ignoring creation failures other than "already
5221 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5224 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5225 because an input line was too long, either on its own, or by virtue of
5226 too many continuations, the temporary file was not being removed, and the
5227 return code was incorrect.
5229 PH/31 Missing "BOOL" in function definition in filtertest.c.
5231 PH/32 Applied Sieve patches from the maintainer.
5233 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5235 PH/33 Added "verify = not_blind".
5237 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5238 Local/Makefile (with some defaults set). These are used in built scripts
5239 such as exicyclog, but they have never been used in the exim_install
5240 script (though there are many overriding facilities there). I have
5241 arranged that the exim_install script now takes note of these two
5244 PH/35 Installed configuration files for Dragonfly.
5246 PH/36 When a locally submitted message by a trusted user did not contain a
5247 From: header, and the sender address was obtained from -f or from an SMTP
5248 MAIL command, and the trusted user did not use -F to supply a sender
5249 name, $originator_name was incorrectly used when constructing a From:
5250 header. Furthermore, $originator_name was used for submission mode
5251 messages from external hosts without From: headers in a similar way,
5252 which is clearly wrong.
5254 PH/37 Added control=suppress_local_fixups.
5256 PH/38 When log_selector = +received_sender was set, and the addition of the
5257 sender made the log line's construction buffer exactly full, or one byte
5258 less than full, an overflow happened when the terminating "\n" was
5261 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5262 when the result of a list match is failure because a DNS lookup failed.
5264 PH/40 RM_COMMAND is now used in the building process.
5266 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5267 the "build-* directories that it finds.
5269 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5270 address in a domain literal was a prefix of an interface address.
5272 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5273 when verifying a sender address, unless rewrite_headers is false.
5275 PH/44 Wrote a long comment about why errors_to addresses are verified as
5276 recipients, not senders.
5278 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5279 the ratelimit ACL was added.
5281 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5283 PH/46 Added extra information about PostgreSQL errors to the error string.
5285 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5286 avoiding the need to install special zones in a real server. This is
5287 backwards compatible; if it can't find the fake resolver, it drops back.
5288 Thus, both old and new test suites can be run.
5290 TF/02 Added util/ratelimit.pl
5292 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5293 clock is set back in time.
5295 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5296 Candler <B.Candler@pobox.com>.
5298 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5299 OK for addresses that are the result of redirections.
5301 PH/48 A number of further additions for the benefit of the new test suite,
5302 including a fake gethostbyname() that interfaces to the fake DNS resolver
5305 TF/06 The fix for widen_domains has also been applied to qualify_single and
5306 search_parents which are the other dnslookup options that can cause
5309 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5312 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5314 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5315 service" if it encountered an MX record with an empty target hostname.
5316 The message is now "an MX or SRV record indicated no SMTP service".
5318 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5319 if the DNS of the sending site is misconfigured. This is quite a
5320 common situation. This change restores the behaviour of treating a
5321 helo verification defer as a failure.
5323 PH/51 If self=fail was set on a router, the bounce message did not include the
5324 actual error message.
5330 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5332 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5333 command itself ended in error, the underlying message about the transport
5334 filter timeout was being overwritten with the pipe command error. Now the
5335 underlying error message should be appended to the second error message.
5337 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5339 PH/02 Reduce the amount of output that "make" produces by default. Full output
5340 can still be requested.
5342 PH/03 The warning log line about a condition test deferring for a "warn" verb
5343 was being output only once per connection, rather than after each
5344 occurrence (because it was using the same function as for successful
5345 "warn" verbs). This seems wrong, so I have changed it.
5347 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5348 it should not have, which might have caused a crash in the right
5349 circumstances, but probably never did.
5351 PH/04 Installed a modified version of Tony Finch's patch to make submission
5352 mode fix the return path as well as the Sender: header line, and to
5353 add a /name= option so that you can make the user's friendly name appear
5356 TF/03 Added the control = fakedefer ACL modifier.
5358 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5359 Mark Lowes for thorough testing.
5361 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5363 TK/03 Merged latest SRS patch from Miles Wilton.
5365 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5366 with the definition in sysexits.h (which is #included earlier).
5367 Fortunately, Exim does not actually use EX_OK. The code used to try to
5368 preserve the sysexits.h value, by assuming that macro definitions were
5369 scanned for macro replacements. I have been disabused of this notion,
5370 so now the code just undefines EX_OK before #including unistd.h.
5372 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5373 in the smtp transport. When a block could not be written in a single
5374 write() function, the timeout was being re-applied to each part-write.
5375 This seems wrong - if the receiver was accepting one byte at a time it
5376 would take for ever. The timeout is now adjusted when this happens. It
5377 doesn't have to be particularly precise.
5379 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5380 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5382 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5383 without a domain if the check to <postmaster@domain> fails.
5385 SC/01 Eximstats: added -xls and the ability to specify output files
5386 (patch written by Frank Heydlauf).
5388 SC/02 Eximstats: use FileHandles for outputting results.
5390 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5392 SC/04 Eximstats: fixed display of large numbers with -nvr option
5394 SC/05 Eximstats: fixed merging of reports with empty tables.
5396 SC/06 Eximstats: added the -include_original_destination flag
5398 SC/07 Eximstats: removed tabs and trailing whitespace.
5400 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5402 TK/06 MBOX spool code: Add real "From " MBOX separator line
5403 so the .eml file is really in mbox format (even though
5404 most programs do not really care). Patch from Alex Miller.
5406 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5407 The latter is generated from $received_to and is only set if the
5408 message has one envelope recipient. SA can use these headers,
5409 obviously out-of-the-box. Patch from Alex Miller.
5411 PH/08 The ${def test on a variable was returning false if the variable's
5412 value was "0", contrary to what the specification has always said!
5413 The result should be true unless the variable is empty.
5415 PH/09 The syntax error of a character other than { following "${if
5416 def:variable_name" (after optional whitespace) was not being diagnosed.
5417 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5418 accidental colon was present, for example, could give incorrect results.
5420 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5421 result is used (not including appendfile, where other changes are about
5424 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5425 This involved changing a lot of size variables from int to off_t. It
5426 should work with maildirs and everything.
5428 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5429 spamd dying while we are connected to it.
5431 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5434 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5435 function for BDB 4.3.
5437 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5439 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5440 the sources for PCRE have been re-arranged and more files are now
5443 PH/15 The code I had for printing potentially long long variables in PH/11
5444 above was not the best (it lost precision). The length of off_t variables
5445 is now inspected at build time, and an appropriate printing format (%ld
5446 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5447 to be "long long int" or "long int". This is needed for the internal
5448 formatting function string_vformat().
5450 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5451 the configuration file to be ":syslog", then the script "guesses" where
5452 the logs files are, rather than using the compiled in default. In our
5453 case the guess is not the same as the compiled default, so the script
5454 suddenly stopped working when I started to use syslog. The patch checks
5455 to see if log_file_path is "". If so, it attempts to read it from exim
5456 with no configuration file to get the compiled in version, before it
5457 falls back to the previous guessing code."
5459 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5460 implementing BATV in an Exim configuration. See NewStuff for the gory
5463 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5464 Makefile that are specific to HP-UX.
5466 PH/18 If the "use_postmaster" option was set for a recipient callout together
5467 with the "random" option, the postmaster address was used as the MAIL
5468 FROM address for the random test, but not for the subsequent recipient
5469 test. It is now used for both.
5471 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5472 patch removes a few documentation additions to RFC 3028, because the
5473 latest draft now contains them. It adds the new en;ascii-case comparator
5474 and a new error check for 8bit text in MIME parts. Comparator and
5475 require names are now matched exactly. I enabled the subaddress
5476 extension, but it is not well tested yet (read: it works for me)."
5478 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5479 rework some of the code of TK/09 above to avoid the hardwired use of
5480 "%lld" and "long long". Replaced the call to snprintf() with a call to
5483 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5484 records point to non-existent hosts", "retry timeout exceeded", and
5485 "retry time not reached for any host after a long failure period".
5487 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5488 experimental DomainKeys support:
5490 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5491 (2) On an error such as an illegally used "control", the wrong name for
5492 the control was given.
5494 These problems did NOT occur unless DomainKeys support was compiled.
5496 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5498 PH/24 Added ${if match_ip condition.
5500 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5501 databases so that it will be absolutely obvious if a crash occurs in the
5502 DB library. This is a regular occurrence (often caused by mis-matched
5505 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5506 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5507 picked up on a user's system that detects such things. There doesn't seem
5508 to be a gcc warning option for this - only an attribute that has to be
5509 put on the function's prototype. It seems that in Fedora Core 4 they have
5510 set this on a number of new functions. No doubt there will be more in due
5513 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5514 specify a transport. However, if an address that was verified by such a
5515 router was the subject of a callout, Exim crashed because it tried to
5516 read the rcpt_include_affixes from the non-existent transport. Now it
5517 just assumes that the setting of that option is false. This bug was
5518 introduced by 4.51/PH/31.
5520 PH/28 Changed -d+all to exclude +memory, because that information is very
5521 rarely of interest, but it makes the output a lot bigger. People tend to
5522 do -d+all out of habit.
5524 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5525 code in os-type was giving problems when libc.so lives in lib64, like on
5528 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5529 aren't the modern standard, and it seems that some systems' include files
5530 don't always have them. Exim was already checking for some of the newer
5531 ones like T_AAAA, and defining it itself. I've added checks for all the
5532 record types that Exim uses.
5534 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5535 not automatically generating a new one, as it is supposed to. This
5536 prevented TLS from working. If the file did exist, but contained invalid
5537 data, a new version was generated, as expected. It was only the case of a
5538 non-existent file that was broken.
5540 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5541 with a change in libdomainkeys > 0.64.
5543 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5544 from DNS. If the selector record carries the flag, it now has
5545 precedence over the domain-wide flag.
5547 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5549 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5550 the use of a port name that isn't defined in /etc/services) occurred, the
5551 message was deferred as in a normal delivery, and thus remained on the
5552 spool, instead of being failed because of the mua_wrapper setting. This
5553 is now fixed, and I tidied up some of the mua_wrapper messages at the
5556 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5557 the messages in a hash of arrays rather than using individual hashes.
5558 This is a bit cleaner and results in dramatic memory savings, albeit
5559 at a slight CPU cost.
5561 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5562 as requested by Marc Sherman.
5564 SC/10 Eximstats: added histograms for user specified patterns as requested
5567 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5569 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5570 fopen() in the content-scanning modules that did not already have it.
5576 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5577 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5579 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5581 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5583 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5584 to test Sieve filters that use "vacation".
5586 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5587 that changes the way the GnuTLS parameters are stored in the cache file.
5588 The new format can be generated externally. For backward compatibility,
5589 if the data in the cache doesn't make sense, Exim assumes it has read an
5590 old-format file, and it generates new data and writes a new file. This
5591 means that you can't go back to an older release without removing the
5594 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5595 work if there are any delivery delays because "one_time" forces the
5596 parent to be marked "delivered", so its unseen clone is never tried
5597 again. For this reason, Exim now forbids the simultaneous setting of
5600 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5601 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5602 entry if you want to know the details. The fix, however, neglected to
5603 consider the case when local delivery batching is involved. The test for
5604 "previously delivered" was not happening when checking to see if an
5605 address could be batched with a previous (undelivered) one; under
5606 certain circumstances this could lead to multiple deliveries to the same
5609 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5610 in its include files, and this causes problems building Exim.
5612 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5613 header_syntax) but Exim was just ignoring anything given after a slash.
5614 In particular, this caused confusion with an attempt to use "verify =
5615 reverse_host_lookup/defer_ok". An error is now given when options are
5616 supplied for verify items that do not have them. (Maybe reverse_host_
5617 lookup should have a defer_ok option, but that's a different point.)
5619 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5620 defined by RFC 821) to 2048, because there were problems with some AUTH
5621 commands, and RFC 1869 says the size should be increased for extended
5622 SMTP commands that take arguments.
5624 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5627 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5628 "unknown" error; now it says that the functionality isn't in the binary.
5630 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5631 an address' error message when a string expansion fails (syntax or
5632 whatever). Otherwise the password may appear in the log. Following change
5633 PH/42 below, there is no longer a chance of it appearing in a bounce
5636 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5638 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5639 of its addresses was ever tried. (Bugzilla bug #2.)
5641 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5642 the result incorrectly in the debug output. (It correctly added a newline
5643 to what was transported.)
5645 TF/01 Added $received_time.
5647 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5648 commented out examples of how to interface to a virus scanner and to
5649 SpamAssassin. Also added commented examples of av_scanner and
5650 spamd_address settings.
5652 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5653 and controls are allowed in which ACLs. There were a couple of minor
5654 errors. Some of the entries in the conditions table (which is a table of
5655 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5656 negation of where the condition IS allowed.
5658 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5660 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5661 header file does not have a version number, so I've had to invent a new
5662 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5663 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5664 radiusclient), but it was contributed by a Radius user.
5666 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5667 files or directories, for OpenSSL.
5669 PH/19 When an Exim process that is running as root has to create an Exim log
5670 file, it does so in a subprocess that runs as exim:exim so as to get the
5671 ownership right at creation (otherwise, other Exim processes might see
5672 the file with the wrong ownership). There was no test for failure of this
5673 fork() call, which would lead to the process getting stuck as it waited
5674 for a non-existent subprocess. Forks do occasionally fail when resources
5675 run out. I reviewed all the other calls to fork(); they all seem to check
5678 PH/20 When checking for unexpected SMTP input at connect time (before writing
5679 the banner), Exim was not dealing correctly with a non-positive return
5680 from the read() function. If the client had disconnected by this time,
5681 the result was a log entry for a synchronization error with an empty
5682 string after "input=" when read() returned zero. If read() returned -1
5683 (an event I could not check), uninitialized data bytes were printed.
5684 There were reports of junk text (parts of files, etc) appearing after
5687 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5689 PH/22 Added support for macro redefinition, and (re)definition in between
5690 driver and ACL definitions.
5692 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5693 forgetting to use the resulting value; it was using the unexpanded value.
5695 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5696 hadn't been configured. The fix is from Juergen Kreileder, who
5697 understands it better than I do:
5699 "Here's what I see happening with three configured cyrus_sasl
5700 authenticators configured (plain, login, cram-md5):
5702 On startup auth_cyrus_sasl_init() gets called for each of these.
5703 This means three calls to sasl_listmech() without a specified mech_list.
5704 => SASL tests which mechs of all available mechs actually work
5705 => three warnings about OTP not working
5706 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5708 With the patch, sasl_listmech() also gets called three times. But now
5709 SASL's mech_list option is set to the server_mech specified in the the
5710 authenticator. Or in other words, the answer from sasl_listmech()
5711 gets limited to just the mech you're testing for (which is different
5713 => the return list contains just 'plain' or 'login', 'cram-md5' or
5714 nothing depending on the value of ob->server_mech.
5716 I've just tested the patch: Authentication still works fine,
5717 unavailable mechs specified in the exim configuration are still
5718 caught, and the auth.log warnings about OTP are gone."
5720 PH/25 When debugging is enabled, the contents of the command line are added
5721 to the debugging output, even when log_selector=+arguments is not
5724 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5725 answer is "GNU", and only if the return is "GNU/something" is the answer
5728 PH/27 $acl_verify_message is now set immediately after the failure of a
5729 verification in an ACL, and so is available in subsequent modifiers. In
5730 particular, the message can be preserved by coding like this:
5732 warn !verify = sender
5733 set acl_m0 = $acl_verify_message
5735 Previously, $acl_verify_message was set only while expanding "message"
5736 and "log_message" when a very denied access.
5738 PH/28 Modified OS/os.c-Linux with
5740 -#ifndef OS_LOAD_AVERAGE
5741 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5743 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5744 nomenclature these days.)
5746 PH/29 Installed patch from the Sieve maintainer that adds the options
5747 sieve_useraddress and sieve_subaddress to the redirect router.
5749 PH/30 In these circumstances:
5750 . Two addresses routed to the same list of hosts;
5751 . First host does not offer TLS;
5752 . First host accepts first address;
5753 . First host gives temporary error to second address;
5754 . Second host offers TLS and a TLS session is established;
5755 . Second host accepts second address.
5756 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5757 and peerdn, if requested) that were in fact used only for the second
5760 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5761 attention to any local part prefix or suffix that was matched by the
5762 router that accepted the address. It now behaves in the same way as it
5763 does for delivery: the affixes are removed from the local part unless
5764 rcpt_include_affixes is set on the transport.
5766 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5767 timeout during the DATA phase of an incoming message.
5769 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5770 applied a patch sanctioned by the Sieve maintainer.
5772 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5773 the uid or gid is negative. A case of a negative gid caused this to be
5774 noticed. The fix allows for either to be negative.
5776 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5777 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5780 PH/36 The change PH/12 above was broken. Fixed it.
5782 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5783 the grounds that routing the same address twice would always produce the
5784 same answer. This might have been true once, but it is certainly no
5785 longer true now. Routing a child address may depend on the previous
5786 routing that produced that child. Some complicated redirection strategies
5787 went wrong when messages had multiple recipients, and made Exim's
5788 behaviour dependent on the order in which the addresses were given.
5790 I have moved the duplicate checking until after the routing is complete.
5791 Exim scans the addresses that are assigned to local and remote
5792 transports, and removes any duplicates. This means that more work will be
5793 done, as duplicates will always all be routed, but duplicates are
5794 presumably rare, so I don't expect this is of any significance.
5796 For deliveries to pipes, files, and autoreplies, the duplicate checking
5797 still happens during the routing process, since they are not going to be
5800 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5801 It corrects a timeout issue with spamd. This is Ian's comment: "The
5802 background is that sometimes spamd either never reads data from a
5803 connection it has accepted, or it never writes response data. The exiscan
5804 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5805 blindly assumes that writes won't block so it may never time out."
5807 PH/39 Allow G after quota size as well as K and M.
5809 PH/40 The value set for $authenticated_id in an authenticator may not contain
5810 binary zeroes or newlines because the value is written to log lines and
5811 to spool files. There was no check on this. Now the value is run through
5812 the string_printing() function so that such characters are converted to
5813 printable escape sequences.
5815 PH/41 $message_linecount is a new variable that contains the total number of
5816 lines in the message. Compare $body_linecount, which is the count for the
5819 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5820 bounce and delay warning messages, except in certain special cases, which
5823 (a) An SMTP error message from a remote host;
5824 (b) A message specified in a :fail: redirection;
5825 (c) A message specified in a "fail" command in a system filter;
5826 (d) A message specified in a FAIL return from the queryprogram router;
5827 (e) A message specified by the cannot_route_message router option.
5829 In these cases only, Exim does include the error details in bounce and
5830 warning messages. There are also a few cases where bland messages such
5831 as "unrouteable address" or "local delivery error" are given.
5833 PH/43 $value is now also set for the "else" part of a ${run expansion.
5835 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5836 being worked on, but at least Exim now implements the latest version to
5839 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5840 process to complete was treated as a delivery failure, a timeout while
5841 writing the message to the pipe was logged, but erroneously treated as a
5842 successful delivery. Such timeouts include transport filter timeouts. For
5843 consistency with the overall process timeout, these timeouts are now
5844 treated as errors, giving rise to delivery failures by default. However,
5845 there is now a new Boolean option for the pipe transport called
5846 timeout_defer, which, if set TRUE, converts the failures into defers for
5847 both kinds of timeout. A transport filter timeout is now identified in
5850 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5851 systems where "make" and "gmake" are different, calling "gmake" at top
5852 level broke things. I've arranged for the value of $(MAKE) to be passed
5853 from the Makefile to this script so that it can call the same version of
5857 A note about Exim versions 4.44 and 4.50
5858 ----------------------------------------
5860 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5861 changes of various kinds. As a consequence, a big documentation update was
5862 needed. This delayed the release for rather longer than seemed good, especially
5863 in the light of a couple of (minor) security issues. Therefore, the changes
5864 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5865 release. So 4.44 and 4.50 are in effect two different branches that both start
5868 I have left the 4.50 change log unchanged; it contains all the changes since
5869 4.43. The change log for 4.44 is below; many of its items are identical to
5870 those for 4.50. This seems to be the most sensible way to preserve the
5871 historical information.
5877 1. Minor wording change to the doc/README.SIEVE file.
5879 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5880 computation of the current number of files was incorrect.
5882 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5883 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5886 4. Give more explanation in the error message when the command for a transport
5887 filter fails to execute.
5889 5. There are several places where Exim runs a non-Exim command in a
5890 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5891 was being done only for the command run by the queryprogram router. It is
5892 now done for all such subprocesses. The other cases are: ${run, transport
5893 filters, and the commands run by the lmtp and pipe transports.
5895 6. Added CONFIGURE_GROUP build-time option.
5897 7. Some older OS have a limit of 256 on the maximum number of file
5898 descriptors. Exim was using setrlimit() to set 1000 as a large value
5899 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5900 systems. I've change it so that if it can't get 1000, it tries for 256.
5902 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5903 was an oversight, and furthermore, ever since the addition of extra
5904 controls (e.g. 4.43/32), the checks on when to allow different forms of
5905 "control" were broken. There should now be diagnostics for all cases when a
5906 control that does not make sense is encountered.
5908 9. Added the /retain_sender option to "control=submission".
5910 10. $recipients is now available in the predata ACL (oversight).
5912 11. Tidy the search cache before the fork to do a delivery from a message
5913 received from the command line. Otherwise the child will trigger a lookup
5914 failure and thereby defer the delivery if it tries to use (for example) a
5915 cached ldap connection that the parent has called unbind on.
5917 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5918 of $address_data from the recipient verification was clobbered by the
5919 sender verification.
5921 13. The value of address_data from a sender verification is now available in
5922 $sender_address_data in subsequent conditions in the ACL statement.
5924 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5926 15. Added a new option "connect=<time>" to callout options, to set a different
5929 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5930 was its contents. (It was OK if the option was not defined at all.)
5932 17. A "Completed" log line is now written for messages that are removed from
5933 the spool by the -Mrm option.
5935 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5936 information about exactly what failed.
5938 19. Added -dd to debug only the daemon process.
5940 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5941 handles timeouts, both on the server side and network timeouts. Renamed the
5942 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5944 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5945 It is now set to "smtps".
5947 22. $host_address is now set to the target address during the checking of
5948 ignore_target_hosts.
5950 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5951 being passed; this would have caused $sender_host_name to have been used if
5952 matching the list had actually called for a host name (not very likely,
5953 since this list is usually IP addresses). A host name is now passed as
5956 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5957 code that specifies a non-restarting handler (typically sigaction() in
5958 modern systems) in an attempt to fix a rare and obscure crash bug.
5960 25. Narrowed the window for a race in the daemon that could cause it to ignore
5961 SIGCHLD signals. This is not a major problem, because they are used only to
5962 wake it up if nothing else does.
5964 26. A malformed maildirsize file could cause Exim to calculate negative values
5965 for the mailbox size or file count. Odd effects could occur as a result.
5966 The maildirsize information is now recalculated if the size or filecount
5969 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5970 support for a long time. Removed HAVE_SYS_VFS_H.
5972 28. Installed the latest version of exipick from John Jetmore.
5974 29. In an address list, if the pattern was not a regular expression, an empty
5975 subject address (from a bounce message) matched only if the pattern was an
5976 empty string. Non-empty patterns were not even tested. This was the wrong
5977 because it is perfectly reasonable to use an empty address as part of a
5978 database query. An empty address is now tested by patterns that are
5979 lookups. However, all the other forms of pattern expect the subject to
5980 contain a local part and a domain, and therefore, for them, an empty
5981 address still always fails if the pattern is not itself empty.
5983 30. Exim went into a mad DNS loop when attempting to do a callout where the
5984 host was specified on an smtp transport, and looking it up yielded more
5985 than one IP address.
5987 31. Re-factored the code for checking spool and log partition space into a
5988 function that finds that data and another that does the check. The former
5989 is then used to implement four new variables: $spool_space, $log_space,
5990 $spool_inodes, and $log_inodes.
5992 32. The RFC2047 encoding function was originally intended for short strings
5993 such as real names; it was not keeping to the 75-character limit for
5994 encoded words that the RFC imposes. It now respects the limit, and
5995 generates multiple encoded words if necessary. To be on the safe side, I
5996 have increased the buffer size for the ${rfc2047: expansion operator from
5999 33. It is now permitted to omit both strings after an "if" condition; if the
6000 condition is true, the result is "true". As before, when the second string
6001 is omitted, a false condition yields an empty string. This makes it less
6002 cumbersome to write custom ACL and router conditions.
6004 34. Failure to deliver a bounce message always caused it to be frozen, even if
6005 there was an errors_to setting on the router. The errors_to setting is now
6008 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6009 canonical form (fully expanded) before being placed in
6010 $sender_host_address.
6012 36. The table in the code that translates DNS record types into text (T_A to
6013 "A" for instance) was missing entries for NS and CNAME. It is just possible
6014 that this could have caused confusion if both these types were looked up
6015 for the same domain, because the text type is used as part of Exim's
6016 per-process caching. But the chance of anyone hitting this buglet seems
6019 37. The dnsdb lookup has been extended in a number of ways.
6021 (1) There is a new type, "zns", which walks up the domain tree until it
6022 finds some nameserver records. It should be used with care.
6024 (2) There is a new type, "mxh", which is like "mx" except that it returns
6025 just the host names, not the priorities.
6027 (3) It is now possible to give a list of domains (or IP addresses) to be
6028 looked up. The behaviour when one of the lookups defers can be
6029 controlled by a keyword.
6031 (4) It is now possible to specify the separator character for use when
6032 multiple records are returned.
6034 38. The dnslists ACL condition has been extended: it is now possible to supply
6035 a list of IP addresses and/or domains to be looked up in a particular DNS
6038 39. Added log_selector=+queue_time_overall.
6040 40. When running the queue in the test harness, wait just a tad after forking a
6041 delivery process, to get repeatability of debugging output.
6043 41. Include certificate and key file names in error message when GnuTLS fails
6044 to set them up, because the GnuTLS error message doesn't include the name
6045 of the failing file when there is a problem reading it.
6047 42. Allow both -bf and -bF in the same test run.
6049 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
6051 44. The "Exiscan patch" is now merged into the mainline Exim source.
6053 45. Sometimes the final signoff response after QUIT could fail to get
6054 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6055 < 0 before doing a fflush(). This bug looks as though it goes back to the
6056 introduction of TLS in release 3.20, but "sometimes" must have been rare
6057 because the tests only now provoked it.
6059 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
6060 (this can affect the format of dates).
6062 47. exim_tidydb, when checking for the continued existence of a message for
6063 which it has found a message-specific retry record, was not finding
6064 messages that were in split spool directories. Consequently, it was
6065 deleting retry records that should have stayed in existence.
6067 48. Steve fixed some bugs in eximstats.
6069 49. The SPA authentication driver was not abandoning authentication and moving
6070 on to the next authenticator when an expansion was forced to fail,
6071 contradicting the general specification for all authenticators. Instead it
6072 was generating a temporary error. It now behaves as specified.
6074 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
6075 (the order specifies the preference for clients). The order is now AES256,
6076 AES128, 3DES, ARCFOUR128.
6078 51. Small patch to Sieve code - explicitly set From: when generating an
6081 52. Exim crashed if a remote delivery caused a very long error message to be
6082 recorded - for instance if somebody sent an entire SpamAssassin report back
6083 as a large number of 550 error lines. This bug was coincidentally fixed by
6084 increasing the size of one of Exim's internal buffers (big_buffer) that
6085 happened as part of the Exiscan merge. However, to be on the safe side, I
6086 have made the code more robust (and fixed the comments that describe what
6089 53. Now that there can be additional text after "Completed" in log lines (if
6090 the queue_time_overall log selector is set), a one-byte patch to exigrep
6091 was needed to allow it to recognize "Completed" as not the last thing in
6094 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6095 patch that reportedly fixes this has been added. I am not expert enough to
6096 create a test for it. This is what the patch creator wrote:
6098 "I found a little strange behaviour of ldap code when working with
6099 Windows 2003 AD Domain, where users was placed in more than one
6100 Organization Units. When I tried to give exim partial DN, the exit code
6101 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6102 But simultaneously result of request was absolutely normal ldap result,
6103 so I produce this patch..."
6105 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6106 REFERENCE, so I have modified the code to exclude the patch when that macro
6109 55. Some experimental protocols are using DNS PTR records for new purposes. The
6110 keys for these records are domain names, not reversed IP addresses. The
6111 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6112 leaves it alone. Component reversal etc. now happens only for IP addresses.
6115 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6117 57. Double the size of the debug message buffer (to 2048) so that more of very
6118 long debug lines gets shown.
6120 58. The exicyclog utility now does better if the number of log files to keep
6121 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6123 59. Two changes related to the smtp_active_hostname option:
6125 (1) $smtp_active_hostname is now available as a variable.
6126 (2) The default for smtp_banner uses $smtp_active_hostname instead
6127 of $primary_hostname.
6129 60. The host_aton() function is supposed to be passed a string that is known
6130 to be a valid IP address. However, in the case of IPv6 addresses, it was
6131 not checking this. This is a hostage to fortune. Exim now panics and dies
6132 if the condition is not met. A case was found where this could be provoked
6133 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6134 components; fortuitously, this particular loophole had already been fixed
6135 by change 4.50/55 above.
6137 If there are any other similar loopholes, the new check in host_aton()
6138 itself should stop them being exploited. The report I received stated that
6139 data on the command line could provoke the exploit when Exim was running as
6140 exim, but did not say which command line option was involved. All I could
6141 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6142 running as the user.
6145 61. There was a buffer overflow vulnerability in the SPA authentication code
6146 (which came originally from the Samba project). I have added a test to the
6147 spa_base64_to_bits() function which I hope fixes it.
6150 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6151 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6153 63. The daemon start-up calls getloadavg() while still root for those OS that
6154 need the first call to be done as root, but it missed one case: when
6155 deliver_queue_load_max is set with deliver_drop_privilege. This is
6156 necessary for the benefit of the queue runner, because there is no re-exec
6157 when deliver_drop_privilege is set.
6159 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6160 This has been fixed.
6162 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6163 was in use, was not putting the data itself into the right store pool;
6164 consequently, it could be overwritten for a subsequent message in the same
6165 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6168 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6170 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6171 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6172 the function were treating the return as a boolean value, which happened to
6173 work because 0=false and not-0=true, but is not correct code.
6175 68. The host_aton() function was not handling scoped IPv6 addresses (those
6176 with, for example, "%eth0" on the end) correctly.
6178 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6179 negated items (that is, ~something) in unsigned ints. Some compilers
6180 apparently mutter when there is no cast.
6182 70. If an address verification called from an ACL failed, and did not produce a
6183 user-specific message (i.e. there was only a "system" message), nothing was
6184 put in $acl_verify_message. In this situation, it now puts the system
6187 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6188 session; change 4.31/43 added the unwanted input to the log line - except
6189 that it did not do this in the start of session case. It now does.
6191 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6192 This is wrong and can cause the other end to generate a synchronization
6193 error if it is another Exim or anything else that does the synchronization
6194 check. A QUIT command is no longer sent after a timeout.
6196 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6197 during host lookups.
6199 74. The defer_ok option of callout verification was not working if it was used
6200 when verifying addresses in header lines, that is, for this case:
6202 verify = header_sender/callout=defer_ok
6204 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6205 those file descriptors could be used for SMTP connections. If anything
6206 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6207 could be sent to the SMTP client, causing chaos. The daemon now opens
6208 stdin, stdout, and stderr to /dev/null when it puts itself into the
6211 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6212 log by default. The user can override this with suitable Perl magic.
6214 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6215 the log message when discard triggers, was not working for the DATA ACL or
6216 for the non-SMTP ACL.
6218 78. Error message wording change in sieve.c.
6220 79. If smtp_accept_max_per_host was set, the number of connections could be
6221 restricted to fewer than expected, because the daemon was trying to set up
6222 a new connection before checking whether the processes handling previous
6223 connections had finished. The check for completed processes is now done
6224 earlier. On busy systems, this bug wouldn't be noticed because something
6225 else would have woken the daemon, and it would have reaped the completed
6228 80. If a message was submitted locally by a user whose login name contained one
6229 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6230 It caused a spool format error. I have fixed the spool reading code. A
6231 related problem was that the "from" clause in the Received: line became
6232 illegal because of the space(s). It is now covered by ${quote_local_part.
6234 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6237 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6239 83. Patch from Sieve maintainer to fix unterminated string problem in
6240 "vacation" handling.
6242 84. Some minor changes to the Linux configuration files to help with other
6243 OS variants using glibc.
6245 85. One more patch for Sieve to update vacation handling to latest spec.
6248 ----------------------------------------------------
6249 See the note above about the 4.44 and 4.50 releases.
6250 ----------------------------------------------------
6256 1. Change 4.43/35 introduced a bug that caused file counts to be
6257 incorrectly computed when quota_filecount was set in an appendfile
6260 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6261 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6264 3. Give more explanation in the error message when the command for a transport
6265 filter fails to execute.
6267 4. There are several places where Exim runs a non-Exim command in a
6268 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6269 was being done only for the command run by the queryprogram router. It is
6270 now done for all such subprocesses. The other cases are: ${run, transport
6271 filters, and the commands run by the lmtp and pipe transports.
6273 5. Some older OS have a limit of 256 on the maximum number of file
6274 descriptors. Exim was using setrlimit() to set 1000 as a large value
6275 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6276 systems. I've change it so that if it can't get 1000, it tries for 256.
6278 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6279 was an oversight, and furthermore, ever since the addition of extra
6280 controls (e.g. 4.43/32), the checks on when to allow different forms of
6281 "control" were broken. There should now be diagnostics for all cases when a
6282 control that does not make sense is encountered.
6284 7. $recipients is now available in the predata ACL (oversight).
6286 8. Tidy the search cache before the fork to do a delivery from a message
6287 received from the command line. Otherwise the child will trigger a lookup
6288 failure and thereby defer the delivery if it tries to use (for example) a
6289 cached ldap connection that the parent has called unbind on.
6291 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6292 of $address_data from the recipient verification was clobbered by the
6293 sender verification.
6295 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6296 was its contents. (It was OK if the option was not defined at all.)
6298 11. A "Completed" log line is now written for messages that are removed from
6299 the spool by the -Mrm option.
6301 12. $host_address is now set to the target address during the checking of
6302 ignore_target_hosts.
6304 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6305 being passed; this would have caused $sender_host_name to have been used if
6306 matching the list had actually called for a host name (not very likely,
6307 since this list is usually IP addresses). A host name is now passed as
6310 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6311 code that specifies a non-restarting handler (typically sigaction() in
6312 modern systems) in an attempt to fix a rare and obscure crash bug.
6314 15. Narrowed the window for a race in the daemon that could cause it to ignore
6315 SIGCHLD signals. This is not a major problem, because they are used only to
6316 wake it up if nothing else does.
6318 16. A malformed maildirsize file could cause Exim to calculate negative values
6319 for the mailbox size or file count. Odd effects could occur as a result.
6320 The maildirsize information is now recalculated if the size or filecount
6323 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6324 support for a long time. Removed HAVE_SYS_VFS_H.
6326 18. Updated exipick to current release from John Jetmore.
6328 19. Allow an empty sender to be matched against a lookup in an address list.
6329 Previously the only cases considered were a regular expression, or an
6332 20. Exim went into a mad DNS lookup loop when doing a callout where the
6333 host was specified on the transport, if the DNS lookup yielded more than
6336 21. The RFC2047 encoding function was originally intended for short strings
6337 such as real names; it was not keeping to the 75-character limit for
6338 encoded words that the RFC imposes. It now respects the limit, and
6339 generates multiple encoded words if necessary. To be on the safe side, I
6340 have increased the buffer size for the ${rfc2047: expansion operator from
6343 22. Failure to deliver a bounce message always caused it to be frozen, even if
6344 there was an errors_to setting on the router. The errors_to setting is now
6347 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6348 canonical form (fully expanded) before being placed in
6349 $sender_host_address.
6351 24. Updated eximstats to version 1.33
6353 25. Include certificate and key file names in error message when GnuTLS fails
6354 to set them up, because the GnuTLS error message doesn't include the name
6355 of the failing file when there is a problem reading it.
6357 26. Expand error message when OpenSSL has problems setting up cert/key files.
6360 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6361 (this can affect the format of dates).
6363 28. exim_tidydb, when checking for the continued existence of a message for
6364 which it has found a message-specific retry record, was not finding
6365 messages that were in split spool directories. Consequently, it was
6366 deleting retry records that should have stayed in existence.
6368 29. eximstats updated to version 1.35
6369 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6370 1.35 - bugfix such that pie charts by volume are generated correctly
6372 30. The SPA authentication driver was not abandoning authentication and moving
6373 on to the next authenticator when an expansion was forced to fail,
6374 contradicting the general specification for all authenticators. Instead it
6375 was generating a temporary error. It now behaves as specified.
6377 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6378 (the order specifies the preference for clients). The order is now AES256,
6379 AES128, 3DES, ARCFOUR128.
6381 31. Small patch to Sieve code - explicitly set From: when generating an
6384 32. Exim crashed if a remote delivery caused a very long error message to be
6385 recorded - for instance if somebody sent an entire SpamAssassin report back
6386 as a large number of 550 error lines. This bug was coincidentally fixed by
6387 increasing the size of one of Exim's internal buffers (big_buffer) that
6388 happened as part of the Exiscan merge. However, to be on the safe side, I
6389 have made the code more robust (and fixed the comments that describe what
6392 33. Some experimental protocols are using DNS PTR records for new purposes. The
6393 keys for these records are domain names, not reversed IP addresses. The
6394 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6395 leaves it alone. Component reversal etc. now happens only for IP addresses.
6398 34. The host_aton() function is supposed to be passed a string that is known
6399 to be a valid IP address. However, in the case of IPv6 addresses, it was
6400 not checking this. This is a hostage to fortune. Exim now panics and dies
6401 if the condition is not met. A case was found where this could be provoked
6402 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6403 components; fortuitously, this particular loophole had already been fixed
6404 by change 4.50/55 or 4.44/33 above.
6406 If there are any other similar loopholes, the new check in host_aton()
6407 itself should stop them being exploited. The report I received stated that
6408 data on the command line could provoke the exploit when Exim was running as
6409 exim, but did not say which command line option was involved. All I could
6410 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6411 running as the user.
6414 35. There was a buffer overflow vulnerability in the SPA authentication code
6415 (which came originally from the Samba project). I have added a test to the
6416 spa_base64_to_bits() function which I hope fixes it.
6419 36. The daemon start-up calls getloadavg() while still root for those OS that
6420 need the first call to be done as root, but it missed one case: when
6421 deliver_queue_load_max is set with deliver_drop_privilege. This is
6422 necessary for the benefit of the queue runner, because there is no re-exec
6423 when deliver_drop_privilege is set.
6425 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6426 was in use, was not putting the data itself into the right store pool;
6427 consequently, it could be overwritten for a subsequent message in the same
6428 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6431 38. Sometimes the final signoff response after QUIT could fail to get
6432 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6433 < 0 before doing a fflush(). This bug looks as though it goes back to the
6434 introduction of TLS in release 3.20, but "sometimes" must have been rare
6435 because the tests only now provoked it.
6441 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6442 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6443 Now it returns an integer. A number of calls were still expecting a T/F
6444 return. Fortuitously, in all cases, the tests worked in OK situations,
6445 which is the norm. However, things would have gone wrong on any write
6446 failures on the smtp file descriptor. This function is used when sending
6447 messages over SMTP and also when doing verify callouts.
6449 2. When Exim is called to do synchronous delivery of a locally submitted
6450 message (the -odf or -odi options), it no longer closes stderr before doing
6453 3. Implemented the mua_wrapper option.
6455 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6457 5. Implemented the functions header_remove(), header_testname(),
6458 header_add_at_position(), and receive_remove_recipient(), and exported them
6461 6. If an ACL "warn" statement specified the addition of headers, Exim already
6462 inserted X-ACL-Warn: at the start if there was no header name. However, it
6463 was not making this test for the second and subsequent header lines if
6464 there were newlines in the string. This meant that an invalid header could
6465 be inserted if Exim was badly configured.
6467 7. Allow an ACL "warn" statement to add header lines at the start or after all
6468 the Received: headers, as well as at the end.
6470 8. Added the rcpt_4xx retry error code.
6472 9. Added postmaster_mailfrom=xxx to callout verification option.
6474 10. Added mailfrom=xxxx to the callout verification option, for verify=
6477 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6478 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6480 12. Inserted some casts to stop certain compilers warning when using pointer
6481 differences as field lengths or precisions in printf-type calls (mostly
6482 affecting debugging statements).
6484 13. Added optional readline() support for -be (dynamically loaded).
6486 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6487 same clock tick as a message's arrival, so that its received time was the
6488 same as the "first fail" time on the retry record, and that message
6489 remained on the queue past the ultimate address timeout, every queue runner
6490 would try a delivery (because it was past the ultimate address timeout) but
6491 after another failure, the ultimate address timeout, which should have then
6492 bounced the address, did not kick in. This was a "< instead of <=" error;
6493 in most cases the first failure would have been in the next clock tick
6494 after the received time, and all would be well.
6496 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6497 being recognized when the domain list was tested by the match_domain
6498 condition in an expansion string.
6500 16. Added the ${str2b64: operator.
6502 17. Exim was always calling setrlimit() to set a large limit for the number of
6503 processes, without checking whether the existing limit was already
6504 adequate. (It did check for the limit on file descriptors.) Furthermore,
6505 errors from getrlimit() and setrlimit() were being ignored. Now they are
6506 logged to the main and panic logs, but Exim does carry on, to try to do its
6507 job under whatever limits there are.
6509 18. Imported PCRE 5.0.
6511 19. Trivial typo in log message " temporarily refused connection" (the leading
6514 20. If the log selector return_path_on_delivery was set and an address was
6515 redirected to /dev/null, the delivery process crashed because it assumed
6516 that a return path would always be set for a "successful" delivery. In this
6517 case, the whole delivery is bypassed as an optimization, and therefore no
6520 21. Internal re-arrangement: the function for sending a challenge and reading
6521 a response while authentication was assuming a zero-terminated challenge
6522 string. It's now changed to take a pointer and a length, to allow for
6523 binary data in such strings.
6525 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6527 23. Exim was not respecting finduser_retries when seeking the login of the
6528 uid under which it was called; it was always trying 10 times. (The default
6529 setting of finduser_retries is zero.) Also, it was sleeping after the final
6530 failure, which is pointless.
6532 24. Implemented tls_on_connect_ports.
6534 25. Implemented acl_smtp_predata.
6536 26. If the domain in control=submission is set empty, Exim assumes that the
6537 authenticated id is a complete email address when it generates From: or
6538 Sender: header lines.
6540 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6541 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6542 chown and chgrp in /bin and hostname in /usr/bin.
6544 28. Exim was keeping the "process log" file open after each use, just as it
6545 does for the main log. This opens the possibility of it remaining open for
6546 long periods when the USR1 signal hits a daemon. Occasional processlog
6547 errors were reported, that could have been caused by this. Anyway, it seems
6548 much more sensible not to leave this file open at all, so that is what now
6551 29. The long-running daemon process does not normally write to the log once it
6552 has entered its main loop, and it closes the log before doing so. This is
6553 so that log files can straightforwardly be renamed and moved. However,
6554 there are a couple of unusual error situations where the daemon does write
6555 log entries, and I had neglected to close the log afterwards.
6557 30. The text of an SMTP error response that was received during a remote
6558 delivery was being truncated at 512 bytes. This is too short for some of
6559 the long messages that one sometimes sees. I've increased the limit to
6562 31. It is now possible to make retry rules that apply only when a message has a
6563 specific sender, in particular, an empty sender.
6565 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6566 it possible to be selective about when SMTP synchronization is enforced.
6568 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6570 32. Implemented hosts_connection_nolog.
6572 33. Added an ACL for QUIT.
6574 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6577 35. Added mailbox_size and mailbox_filecount to appendfile.
6579 36. Added control = no_multiline_responses to ACLs.
6581 37. There was a bug in the logic of the code that waits for the clock to tick
6582 in the case where the clock went backwards by a substantial amount such
6583 that the microsecond fraction of "now" was more than the microsecond
6584 fraction of "then" (but the whole seconds number was less).
6586 38. Added support for the libradius Radius client library this is found on
6587 FreeBSD (previously only the radiusclient library was supported).
6593 1. When certain lookups returned multiple values in the form name=value, the
6594 quoting of the values was not always being done properly. Specifically:
6595 (a) If the value started with a double quote, but contained no whitespace,
6597 (b) If the value contained whitespace other than a space character (i.e.
6598 tabs or newlines or carriage returns) it was not quoted.
6599 This fix has been applied to the mysql and pgsql lookups by writing a
6600 separate quoting function and calling it from the lookup code. The fix
6601 should probably also be applied to nisplus, ibase and oracle lookups, but
6602 since I cannot test any of those, I have not disturbed their existing code.
6604 2. A hit in the callout cache for a specific address caused a log line with no
6605 reason for rejecting RCPT. Now it says "Previous (cached) callout
6606 verification failure".
6608 3. There was an off-by-one bug in the queryprogram router. An over-long
6609 return line was truncated at 256 instead of 255 characters, thereby
6610 overflowing its buffer with the terminating zero. As well as fixing this, I
6611 have increased the buffer size to 1024 (and made a note to document this).
6613 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6614 when Exim is waiting for an SMTP response from a remote server, Exim
6615 restarts its select() call on the socket, thereby resetting its timeout.
6616 This is not a problem when such interrupts are rare. Somebody set up a cron
6617 job to run exiwhat every 2 minutes, which is less than the normal select()
6618 timeout (5 or 10 minutes). This meant that the select() timeout never
6619 kicked in because it was always reset. I have fixed this by comparing the
6620 time when an interrupt arrives with the time at the start of the first call
6621 to select(). If more time than the timeout has elapsed, the interrupt is
6622 treated as a timeout.
6624 5. Some internal re-factoring in preparation for the addition of Sieve
6625 extensions (by MH). In particular, the "personal" test is moved to a
6626 separate function, and given an option for scanning Cc: and Bcc: (which is
6627 not set for Exim filters).
6629 6. When Exim created an email address using the login of the caller as the
6630 local part (e.g. when creating a From: or Sender: header line), it was not
6631 quoting the local part when it contained special characters such as @.
6633 7. Installed new OpenBSD configuration files.
6635 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6636 try to make them clearer.
6638 9. Callout options, other than the timeout value, were being ignored when
6639 verifying sender addresses in header lines. For example, when using
6641 verify = header_sender/callout=no_cache
6643 the cache was (incorrectly) being used.
6645 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6646 only the Cygwin environment.
6648 11. When return_path_on_delivery was set as a log selector, if different remote
6649 addresses in the same message used different return paths and parallel
6650 remote delivery occurred, the wrong values would sometimes be logged.
6651 (Whenever a remote delivery process finished, the return path value from
6652 the most recently started remote delivery process was logged.)
6654 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6655 lines when AUTH and/or TLS are in use. This is the "received protocol"
6656 field. Exim used to use "asmtp" for authenticated SMTP, without any
6657 indication (in the protocol name) for TLS use. Now it follows the RFC and
6658 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6659 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6660 names appear in log lines as well as in Received: header lines.
6662 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6663 extensions, and comparison tests, and to fix some bugs.
6665 14. Changes to the "personal" filter test:
6667 (1) The test was buggy in that it was just doing the equivalent of
6668 "contains" tests on header lines. For example, if a user's address was
6669 anne@some.where, the "personal" test would incorrectly be true for
6671 To: susanne@some.where
6673 This test is now done by extracting each address from the header in turn,
6674 and checking the entire address. Other tests that are part of "personal"
6675 are now done using regular expressions (for example, to check local parts
6676 of addresses in From: header lines).
6678 (2) The list of non-personal local parts in From: addresses has been
6679 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6680 taken from the Sieve specification recommendations.
6682 (3) If the message contains any header line starting with "List-" it is
6683 treated as non-personal.
6685 (4) The test for "circular" in the Subject: header line has been removed
6686 because it now seems ill-conceived.
6688 15. Minor typos in src/EDITME comments corrected.
6690 16. Installed latest exipick from John Jetmore.
6692 17. If headers_add on a router specified a text string that was too long for
6693 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6694 of string_sprintf() is now avoided.
6696 18. $message_body_size was not set (it was always zero) when running the DATA
6697 ACL and the local_scan() function.
6699 19. For the "mail" command in an Exim filter, no default was being set for
6700 the once_repeat time, causing a random time value to be used if "once" was
6701 specified. (If the value happened to be <= 0, no repeat happened.) The
6702 default is now 0s, meaning "never repeat". The "vacation" command was OK
6703 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6704 (I found it when inspecting the code).
6706 20. There is now an overall timeout for performing a callout verification. It
6707 defaults to 4 times the callout timeout, which applies to individual SMTP
6708 commands during the callout. The overall timeout applies when there is more
6709 than one host that can be tried. The timeout is checked before trying the
6710 next host. This prevents very long delays if there are a large number of
6711 hosts and all are timing out (e.g. when the network connections are timing
6712 out). The value of the overall timeout can be changed by specifying an
6713 additional sub-option for "callout", called "maxwait". For example:
6715 verify = sender/callout=5s,maxwait=20s
6717 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6718 to the end before writing, but this should make it even safer).
6720 22. Exim was forgetting that it had advertised PIPELINING for the second and
6721 subsequent messages on an SMTP connection. It was also not resetting its
6722 memory on STARTTLS and an internal HELO.
6724 23. When Exim logs an SMTP synchronization error within a session, it now
6725 records whether PIPELINING has been advertised or not.
6727 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6728 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6729 rather than long int.
6731 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6733 26. Added the never_mail option to autoreply.
6739 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6740 crash if the getsockname() call failed; this can happen if a connection is
6741 closed very soon after it is established. The problem was simply in the
6742 order in which certain operations were done, causing Exim to try to write
6743 to the SMTP stream before it had set up the file descriptor. The bug has
6744 been fixed by making things happen in the correct order.
6750 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6751 before the connection was closed, thus losing the rejection response.
6753 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6754 some early Solaris releases, but causes trouble in current releases where
6755 socklen_t is defined.
6757 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6760 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6763 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6764 that releasing the top of it at the end releases what was used for sub-
6765 expansions (unless the block got too big). However, discard this block if
6766 the first thing is a variable or header, so that we can use its block when
6767 it is dynamic (useful for very large $message_headers, for example).
6769 6. Lookups now cache *every* query, not just the most recent. A new, separate
6770 store pool is used for this. It can be recovered when all lookup caches are
6771 flushed. Lookups now release memory at the end of their result strings.
6772 This has involved some general refactoring of the lookup sources.
6774 7. Some code has been added to the store_xxx() functions to reduce the amount
6775 of flapping under certain conditions.
6777 8. log_incoming_interface used to affect only the <= reception log lines. Now
6778 it causes the local interface and port to be added to several more SMTP log
6779 lines, for example "SMTP connection from", and rejection lines.
6781 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6783 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6785 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6786 could be overwritten at the end of the current message (or the start of a
6787 new message if it was set in a HELO ACL). The value is now preserved for
6788 the duration of the SMTP connection.
6790 12. If a transport had a headers_rewrite setting, and a matching header line
6791 contained an unqualified address, that address was qualified, even if it
6792 did not match any rewriting rules. The underlying bug was that the values
6793 of the flags that permit the existence of unqualified sender and recipient
6794 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6795 non-local messages, and by -bnq for local messages) were not being
6796 preserved with the message after it was received.
6798 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6799 "next input=" as part of the text comprising the host identity instead of
6800 the correct text. The code was using the same buffer for two different
6801 strings. However, depending on which order the printing function evaluated
6802 its arguments, the bug did not always show up. Under Linux, for example, my
6803 test suite worked just fine.
6805 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6806 doesn't work with some older versions of Perl. It has been changed to "my",
6807 which in any case is probably the better facility to use.
6809 15. A really picky compiler found some instances of statements for creating
6810 error messages that either had too many or two few arguments for the format
6813 16. The size of the buffer for calls to the DNS resolver has been increased
6814 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6815 for addresses that have a lot of PTR records. This alleviates a problem; it
6816 does not fully solve it.
6818 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6819 buffer now truncates the list and logs the incident, which is the same
6820 action as happens when Exim is looking up a host name and its aliases.
6821 Previously in this situation something unpredictable would happen;
6822 sometimes it was "internal error: store_reset failed".
6824 18. If a server dropped the connection unexpectedly when an Exim client was
6825 using GnuTLS and trying to read a response, the client delivery process
6826 crashed while trying to generate an error log message.
6828 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6829 string, for example:
6831 warn message = H1: something\nH2: something
6833 the text was added as a single header line from Exim's point of view
6834 though it ended up OK in the delivered message. However, searching for the
6835 second and subsequent header lines using $h_h2: did not work. This has been
6836 fixed. Similarly, if a system filter added multiple headers in this way,
6837 the routers could not see them.
6839 20. Expanded the error message when iplsearch is called with an invalid key to
6840 suggest using net-iplsearch in a host list.
6842 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6843 ACLs are no longer actually imposed (and a message to that effect is
6846 22. If a "gecos" field in a passwd entry contained escaped characters, in
6847 particular, if it contained a \" sequence, Exim got it wrong when building
6848 a From: or a Sender: header from that name. A second bug also caused
6849 incorrect handling when an unquoted " was present following a character
6850 that needed quoting.
6852 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6853 was not being matched caselessly.
6855 24. Arranged for all hyphens in the exim.8 source to be escaped with
6858 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6859 properly. Recipient callout cache records were still being keyed to include
6860 the sender, even when use_sender was set false. This led to far more
6861 callouts that were necessary. The sender is no longer included in the key
6862 when use_sender is false.
6864 26. Added "control = submission" modifier to ACLs.
6866 27. Added the ${base62d: operator to decode base 62 numbers.
6868 28. dnsdb lookups can now access SRV records.
6870 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6871 the configuration file.
6873 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6874 (-v) mode. This makes the output for a verbose queue run more intelligible.
6876 31. Added a use_postmaster feature to recipient callouts.
6878 32. Added the $body_zerocount variable, containing the number of binary zero
6879 bytes in the message body.
6881 33. The time of last modification of the "new" subdirectory is now used as the
6882 "mailbox time last read" when there is a quota error for a maildir
6885 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6887 35. Added +ignore_unknown as a special item in host lists.
6889 36. Code for decoding IPv6 addresses in host lists is now included, even if
6890 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6891 address was recognized as an IP address, but was then not correctly decoded
6892 into binary, causing unexpected and incorrect effects when compared with
6899 1. Very minor rewording of debugging text in manualroute to say "list of
6900 hosts" instead of "hostlist".
6902 2. If verify=header_syntax was set, and a header line with an unqualified
6903 address (no domain) and a large number of spaces between the end of the
6904 name and the colon was received, the reception process suffered a buffer
6905 overflow, and (when I tested it) crashed. This was caused by some obsolete
6906 code that should have been removed. The fix is to remove it!
6908 3. When running in the test harness, delay a bit after writing a bounce
6909 message to get a bit more predictability in the log output.
6911 4. Added a call to search_tidyup() just before forking a reception process. In
6912 theory, someone could use a lookup in the expansion of smtp_accept_max_
6913 per_host which, without the tidyup, could leave open a database connection.
6915 5. Added the variables $recipient_data and $sender_data which get set from a
6916 lookup success in an ACL "recipients" or "senders" condition, or a router
6917 "senders" option, similar to $domain_data and $local_part_data.
6919 6. Moved the writing of debug_print from before to after the "senders" test
6922 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6923 problems for message scanning, either using a data ACL, or using
6924 local_scan() because the Received: header was not generated till after they
6925 were called (in order to set the time as the time of reception completion).
6926 I have revised the way this works. The header is now generated after the
6927 body is received, but before the ACL or local_scan() are called. After they
6928 are run, the timestamp in the header is updated.
6934 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6935 before starting a queue runner without re-exec. This happened only when
6936 deliver_drop_privilege was set or when the Exim user was set to root. The
6937 effect of the bug was that timeouts during subsequent deliveries caused
6938 crashes instead of being properly handled. The handler is now left at its
6939 default (and expected) setting.
6941 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6942 message, again when deliver_drop_privilege is set or Exim is run as root.
6943 The bug described in (1) was not present in this case, but the tidying up
6944 of the other signals was missing. I have made the two cases consistent.
6946 3. The ignore_target_hosts setting on a manualroute router was being ignored
6947 for hosts that were looked up using the /MX notation.
6949 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6952 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6953 operated on the sender address. After changing the $sender_address to <>
6954 for the sender address verify, Exim was re-instated it as the original
6955 (before rewriting) address, but remembering that it had rewritten it, so it
6956 wasn't rewriting it again. This bug also had the effect of breaking the
6957 sender address verification caching when the sender address was rewritten.
6959 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6960 This has been changed so that if the ip literal address matches
6961 ignore_target_hosts, the router declines.
6963 7. Added expansion conditions match_domain, match_address, and match_local_
6964 part (NOT match_host).
6966 8. The placeholder for the Received: header didn't have a length field set.
6968 9. Added code to Exim itself and to exim_lock to test for a specific race
6969 condition that could lead to file corruption when using MBX delivery. The
6970 issue is with the lockfile that is created in /tmp. If this file is removed
6971 after a process has opened it but before that process has acquired a lock,
6972 there is the potential for a second process to recreate the file and also
6973 acquire a lock. This could lead to two Exim processes writing to the file
6974 at the same time. The added code performs the same test as UW imapd; it
6975 checks after acquiring the lock that its file descriptor still refers to
6976 the same named file.
6978 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6979 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6982 11. Added the smtp_active_hostname option. If used, this will typically be made
6983 to depend on the incoming interface address. Because $interface_address is
6984 not set up until the daemon has forked a reception process, error responses
6985 that can happen earlier (such as "too many connections") no longer contain
6988 12. If an expansion in a condition on a "warn" statement fails because a lookup
6989 defers, the "warn" statement is abandoned, and the next ACL statement is
6990 processed. Previously this caused the whole ACL to be aborted.
6992 13. Added the iplsearch lookup type.
6994 14. Added ident_timeout as a log selector.
6996 15. Added tls_certificate_verified as a log selector.
6998 16. Added a global option tls_require_ciphers (compare the smtp transport
6999 option of the same name). This controls incoming TLS connections.
7001 17. I finally figured out how to make tls_require_ciphers do a similar thing
7002 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
7003 before starting the TLS session.
7005 18. Tabs are now shown as \t in -bP output.
7007 19. If the log selector return_path_on_delivery was set, Exim crashed when
7008 bouncing a message because it had too many Received: header lines.
7010 20. If two routers both had headers_remove settings, and the first one included
7011 a superfluous trailing colon, the final name in the first list and the
7012 first name in the second list were incorrectly joined into one item (with a
7013 colon in the middle).
7019 1. Added -C and -D options to the exinext utility, mainly to make it easier
7020 to include in the automated testing, but these could be helpful when
7021 multiple configurations are in use.
7023 2. The exinext utility was not formatting the output nicely when there was
7024 an alternate port involved in the retry record key, nor when there was a
7025 message id as well (for retries that were specific to a specific message
7026 and a specific host). It was also confused by IPv6 addresses, because of
7027 the additional colons they contain. I have fixed the IPv4 problem, and
7028 patched it up to do a reasonable job for IPv6.
7030 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
7031 delivery, the log line now contains "pipelined" if PIPELINING was used.
7033 4. An SMTP transport process used to panic and die if the bind() call to set
7034 an explicit outgoing interface failed. This has been changed; it is now
7035 treated in the same way as a connect() failure.
7037 5. A reference to $sender_host_name in the part of a conditional expansion
7038 that was being skipped was still causing a DNS lookup. This no longer
7041 6. The def: expansion condition was not recognizing references to header lines
7042 that used bh_ and bheader_.
7044 7. Added the _cache feature to named lists.
7046 8. The code for checking quota_filecount in the appendfile transport was
7047 allowing one more file than it should have been.
7049 9. For compatibility with Sendmail, the command line option
7057 and sets the incoming protocol and host name (for trusted callers). The
7058 host name and its colon can be omitted when only the protocol is to be set.
7059 Note the Exim already has two private options, -pd and -ps, that refer to
7060 embedded Perl. It is therefore impossible to set a protocol value of "d" or
7061 "s", but I don't think that's a major issue.
7063 10. A number of refactoring changes to the code, none of which should affect
7066 (a) The number of logging options was getting close to filling up the
7067 32-bit word that was used as a bit map. I have split them into two classes:
7068 those that are passed in the argument to log_write(), and those that are
7069 only ever tested independently outside of that function. These are now in
7070 separate 32-bit words, so there is plenty of room for expansion again.
7071 There is no change in the user interface or the logging behaviour.
7073 (b) When building, for example, log lines, the code previously used a
7074 macro that called string_cat() twice, in order to add two strings. This is
7075 not really sufficiently general. Furthermore, there was one instance where
7076 it was actually wrong because one of the argument was used twice, and in
7077 one call a function was used. (As it happened, calling the function twice
7078 did not affect the overall behaviour.) The macro has been replaced by a
7079 function that can join an arbitrary number of extra strings onto a growing
7082 (c) The code for expansion conditions now uses a table and a binary chop
7083 instead of a serial search (which was left over from when there were very
7084 few conditions). Also, it now recognizes conditions like "pam" even when
7085 the relevant support is not compiled in: a suitably worded error message is
7086 given if an attempt is made to use such a condition.
7088 11. Added ${time_interval:xxxxx}.
7090 12. A bug was causing one of the ddress fields not to be passed back correctly
7091 from remote delivery subprocesses. The field in question was not being
7092 subsequently used, so this caused to problems in practice.
7094 13. Added new log selectors queue_time and deliver_time.
7096 14. Might have fixed a bug in maildirsizefile handling that threw up
7097 "unexpected character" debug warnings, and recalculated the data
7098 unnecessarily. In any case, I expanded the warning message to give more
7101 15. Added the message "Restricted characters in address" to the statements in
7102 the default ACL that block characters like @ and % in local parts.
7104 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7105 Three changes have been made:
7107 (a) There was a serious bug; a negative response to MAIL caused the whole
7108 recipient domain to be cached as invalid, thereby blocking all messages
7109 to all local parts at the same domain, from all senders. This bug has
7110 been fixed. The domain is no longer cached after a negative response to
7111 MAIL if the sender used is not empty.
7113 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7116 (c) A new callout option, "use_sender" has been added for people who want
7117 the modified behaviour.
7123 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7126 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7127 indeed breaks things for older releases.
7129 3. Added additional logging to the case where there is a problem reading data
7130 from a filter that is running in a subprocess using a pipe, in order to
7131 try to track down a specific problem.
7133 4. Testing facility fudge: when running in the test harness and attempting
7134 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7135 getting "No route to host". Convert this to a timeout.
7137 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7140 6. Some OS don't have socklen_t but use size_t instead. This affects the
7141 fifth argument of getsockopt() amongst other things. This is now
7142 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7143 can be set for individual OS. I have set it for SunOS5, OSF1, and
7144 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7145 some earlier ones do not.
7147 7. Change 4.30/15 was not doing the test caselessly.
7149 8. The standard form for an IPv6 address literal was being rejected by address
7150 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7151 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7152 this, as well as the form without the "IPv6" on the front (but only when
7153 address literals are enabled, of course).
7155 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7157 10. Exim crashed if a message with an empty sender address specified by -f
7158 encountered a router with an errors_to setting. This could be provoked only
7159 by a command such as
7163 where an empty string was supplied; "<>" did not hit this bug.
7165 11. Installed PCRE release 4.5.
7167 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7168 remained set. It is now erased.
7170 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7171 times from message ids (which are base 36 rather than the normal 62).
7173 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7174 were being counted as actual protocol errors, and logged if the log
7175 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7176 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7177 and DATA following a set of rejected RCPTs do not count as protocol errors.
7178 In other words, Exim assumes they were pipelined, though this may not
7179 actually be the case. Of course, in all cases the client gets an
7180 appropriate error code.
7182 15. If a lookup fails in an ACL condition, a message about the failure may
7183 be available; it is used if testing the ACL cannot continue, because most
7184 such messages specify what the cause of the deferral is. However, some
7185 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7186 that caused an old message to be retained and used if a later statement
7187 caused a defer, replacing the real cause of the deferral.
7189 16. If an IP address had so many PTR records that the DNS lookup buffer
7190 was not large enough to hold them, Exim could crash while trying to process
7191 the truncated data. It now detects and logs this case.
7193 17. Further to 4.21/58, another change has been made: if (and only if) the
7194 first line of a message (the first header line) ends with CRLF, a bare LF
7195 in a subsequent header line has a space inserted after it, so as not to
7196 terminate the header.
7198 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7199 unnecessarily, used atoi() instead of strtol(), and didn't check the
7200 termination when getting file sizes from file names by regex.
7202 19. Completely re-implemented the support for maildirsize files, in the light
7203 of a number of problems with the previous contributed implementation
7204 (4.30/29). In particular:
7206 . If the quota is zero, the maildirsize file is maintained, but no quota is
7209 . If the maildir directory does not exist, it is created before any attempt
7210 to write a maildirsize file.
7212 . The quota value in the file is just a cache; if the quota is changed in
7213 the transport, the new value overrides.
7215 . A regular expression is available for excluding directories from the
7218 20. The autoreply transport checks the characters in options that define the
7219 message's headers; it allows continued headers, but it was checking with
7220 isspace() after an embedded newline instead of explicitly looking for a
7223 21. If all the "regular" hosts to which an address was routed had passed their
7224 expiry times, and had not reached their retry times, the address was
7225 bounced, even if fallback hosts were defined. Now Exim should go on to try
7228 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7229 equivalent code in the SMTP transport. Some hosts send humungous responses
7230 to HELO/EHLO, more than 1024 it seems.
7232 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7233 gives compiler warnings in some environments. I've now done it "properly",
7236 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7237 (because of problems with the built-in one) was declared to return uschar *
7238 instead of char *, causing compiler failure.
7240 25. Fixed a file descriptor leak when processing alias/forward files.
7242 26. Fixed a minor format string issue in dbfn.c.
7244 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7246 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7247 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7250 29. When a sender address is verified, it is cached, to save repeating the test
7251 when there is more than one recipient in a message. However, when the
7252 verification involves a callout, it is possible for different callout
7253 options to be set for different recipients. It is too complicated to keep
7254 track of this in the cache, so now Exim always runs a verification when a
7255 callout is required, relying on the callout cache for the optimization.
7256 The overhead is duplication of the address routing, but this should not be
7259 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7260 to be verified with callout=postmaster, and the main callout worked but the
7261 postmaster check failed, the verification correctly failed. However, if a
7262 subsequent RCPT command asked for sender verification *without* the
7263 postmaster check, incorrect caching caused this verification also to fail,
7266 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7267 it was not caching the DNS options (qualify_single, search_parents) that
7268 were used when the lookup failed. A subsequent lookup with different
7269 options therefore always gave the same answer, though there were cases
7270 where it should not have. (Example: a "domains = !$mx_any" option on a
7271 dnslookup router: the "domains" option is always processed without any
7272 widening, but the router might have qualify_single set.) Now Exim uses the
7273 cached value only when the same options are set.
7275 32. Added John Jetmore's "exipick" utility to the distribution.
7277 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7278 than a timeout (e.g. a certificate is required, and is not provided), an
7279 Exim server now closes the connection immediately. Previously it waited for
7280 the client to close - but if the client is SSL, it seems that they each
7281 wait for each other, leading to a delay before one of them times out.
7283 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7284 maintained 0.8.x compatibility because I don't think many are using it, and
7285 it is clearly obsolete.
7287 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7290 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7291 client certificate was expired. A simple patch fixes this, though I don't
7292 understand the full logic of why the verify callback is called multiple
7295 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7296 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7297 which causes problems with some clients (such as the Certicom SSL Plus
7298 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7299 disables the coutermeasure allowing Eudora to connect."
7301 38. Exim was not checking that a write() to a log file succeeded. This could
7302 lead to Bad Things if a log got too big, in particular if it hit a file
7303 size limit. Exim now panics and dies if it cannot write to a log file, just
7304 as it does if it cannot open a log file.
7306 39. Modified OS/Makefile-Linux so that it now contains
7308 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7310 The two -D definitions ensure that Exim is compiled with large file
7311 support, which makes it possible to handle log files that are bigger than
7314 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7315 instance) a domain was checked against a named list that involved a lookup,
7316 causing $domain_data to be set, then another domain was checked against the
7317 same list, then the first domain was re-checked, the value of $domain_data
7318 after the final check could be wrong. In particular, if the second check
7319 failed, it could be set empty. This bug probably also applied to
7322 41. The strip_trailing_dot option was not being applied to the address given
7323 with the -f command-line option.
7325 42. The code for reading a message's header from the spool was incrementing
7326 $received_count, but never initializing it. This meant that the value was
7327 incorrect (doubled) while delivering a message in the same process in which
7328 it was received. In the most common configuration of Exim, this never
7329 happens - a fresh exec is done - but it can happen when
7330 deliver_drop_privilege is set.
7332 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7333 it now includes up to 150 characters of the unexpected data in the log
7336 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7337 and building data strings. The size of both of these buffers was 10 000
7338 bytes - far larger than anybody would *ever* want, thought I. Needless to
7339 say, somebody hit the limit. I have increased the maximum line length to
7340 20 000 and the maximum data length of concatenated lines to 100 000. I have
7341 also fixed two bugs, because there was no checking on these buffers. Tsk,
7342 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7343 buffer is too small.
7345 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7346 lsearch lookups. Now it does.
7348 46. When parsing a route_list item in a manualroute router, a fixed-length
7349 buffer was used for the list of hosts. I made this 1024 bytes long,
7350 thinking that nobody would ever have a list of hosts that long. Wrong.
7351 Somebody had a whole pile of complicated expansion conditions, and the
7352 string was silently truncated, leading to an expansion error. It turns out
7353 that it is easier to change to an unlimited length (owing to other changes
7354 that have happened since this code was originally written) than to build
7355 structure for giving a limitation error. The length of the item that
7356 expands into the list of hosts is now unlimited.
7358 47. The lsearch lookup could not handle data where the length of text line was
7359 more than 4095 characters. Such lines were truncated, leading to shortened
7360 data being returned. It should now handle lines of any length.
7362 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7363 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7366 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7367 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7368 no longer happens in comment lines. A list of replacements is now placed
7369 at the head of all of the source files, except those whose only change is
7370 to replace PERL_COMMAND in the very first #! line.
7372 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7373 messages on the queue, with a bottom-up merge sort, using code contributed
7374 by Michael Haardt. This should make operations like -bp somewhat faster on
7375 large queues. It won't affect queue runners, except when queue_run_in_order
7378 51. Installed eximstats 1.31 in the distribution.
7380 52. Added support for SRV lookups to the dnslookup router.
7382 53. If an ACL referred to $message_body or $message_body_end, the value was not
7383 reset for any messages that followed in the same SMTP session.
7385 54. The store-handling optimization for building very long strings was not
7386 differentiating between the different store pools. I don't think this
7387 actually made any difference in practice, but I've tidied it.
7389 55. While running the routers to verify a sender address, $sender_address
7390 was still set to the sender address. This is wrong, because when routing to
7391 send a bounce to the sender, it would be empty. Therefore, I have changed
7392 it so that, while verifying a sender address, $sender_address is set to <>.
7393 (There is no change to what happens when verifying a recipient address.)
7395 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7396 target A or AAAA records (if not already returned) without resetting the
7397 qualify_single or search_parents options of the DNS resolver. These are
7398 inappropriate in this case because the targets of MX and SRV records must
7399 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7400 target that, when qualified, matched something in the local domain. These
7401 two options are now turned off when doing these lookups.
7403 57. It seems that at least some releases of Reiserfs (which does not have the
7404 concept of a fixed number of inodes) returns zero and not -1 for the
7405 number of available inodes. This interacted badly with check_spool_inodes,
7406 which assumed that -1 was the "no such thing" setting. What I have done is
7407 to check that the total number of inodes is greater than zero before doing
7408 the test of how many are available.
7410 58. When a "warn" ACL statement has a log_message modifier, the message is
7411 remembered, and not repeated. This is to avoid a lot of repetition when a
7412 message has many recipients that cause the same warning to be written.
7413 However, Exim was preserving the list of already written lines for an
7414 entire SMTP session, which doesn't seem right. The memory is now reset if a
7415 new message is started.
7417 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7418 debugging output unless log_rewrite was also set.
7420 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7421 of (int)(handle) when we know that handle contains (void *)(-1).
7423 61. The Exim daemon panic-logs an error return when it closes the incoming
7424 connection. However "connection reset by peer" seems to be common, and
7425 isn't really an error worthy of noting specially, so that particular error
7428 62. When Exim is trying to find all the local interfaces, it used to panic and
7429 die if the ioctl to get the interface flags failed. However, it seems that
7430 on at least one OS (Solaris 9) it is possible to have an interface that is
7431 included in the list of interfaces, but for which you get a failure error
7432 for this call. This happens when the interface is not "plumbed" into a
7433 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7434 failure of the "get flags" call assumes that the interface is down.
7436 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7437 makes life easier for people who are doing arithmetic on fields extracted
7438 from dates, where you often get leading zeros that should not be
7439 interpreted as octal.
7441 64. Added qualify_domain to the redirect router, to override the global
7444 65. If a pathologically long header line contained very many addresses (the
7445 report of this problem mentioned 10 000) and each of them was rewritten,
7446 Exim could use up a very large amount of memory. (It kept on making new
7447 copies of the header line as it rewrote, and never released the old ones.)
7448 At the expense of a bit more processing, the header rewriting function has
7449 been changed so that it no longer eats memory in this way.
7451 66. The generation of the Received: header has been moved from the time that a
7452 message starts to be received, to the time that it finishes. The timestamp
7453 in the Received: header should now be very close to that of the <= log
7454 line. There are two side-effects of this change:
7456 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7457 logged header lines no longer include the local Received: line, because
7458 it has not yet been created. The same applies to a copy of the message
7459 that is returned to a non-SMTP sender when a message is rejected.
7461 (b) When a filter file is tested using -bf, no additional Received: header
7462 is added to the test message. After some thought, I decided that this
7465 This change does not affect the value of $received_for. It is still set
7466 after address rewriting, but before local_scan() is called.
7468 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7470 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7471 gave an unhelpful panic error message, and a defer error. I have managed to
7472 change this behaviour so that it now rejects any supplied certificate,
7473 which seems right, as the list of acceptable certificates is empty.
7475 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7476 gave an unhelpful defer error. I have not managed to make this reject any
7477 supplied certificates, but the error message it gives is "no certificate
7478 supplied", which is not helpful.
7480 70. exigrep's output now also includes lines that are not associated with any
7481 message, but which match the given pattern. Implemented by a patch from
7482 Martin Sluka, which also tidied up the Perl a bit.
7484 71. Recipient callout verification, like sender verification, was using <> in
7485 the MAIL FROM command. This isn't really the right thing, since the actual
7486 sender may affect whether the remote host accepts the recipient or not. I
7487 have changed it to use the actual sender in the callout; this means that
7488 the cache record is now keyed on a recipient/sender pair, not just the
7489 recipient address. There doesn't seem to be a real danger of callout loops,
7490 since a callout by the remote host to check the sender would use <>.
7491 [SEE ABOVE: changed after hitting problems.]
7493 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7494 temporary errors. However, in the case of such a code being given after
7495 the end of a data transmission (i.e. after ".") Exim was failing to write
7496 a retry record for the message. (Yes, there was some broken host that was
7497 actually sending 8xx at this point.)
7499 73. An unknown lookup type in a host list could cause Exim to panic-die when
7500 the list was checked. (An example that provoked this was putting <; in the
7501 middle of a list instead of at the start.) If this happened during a DATA
7502 ACL check, a -D file could be left lying around. This kind of configuration
7503 error no longer causes Exim to die; instead it causes a defer error. The
7504 incident is still logged to the main and panic logs.
7506 74. Buglet left over from Exim 3 conversion. The message "too many messages
7507 in one connection" was written to the rejectlog but not the mainlog, except
7508 when address rewriting (yes!) was being logged.
7510 75. Added write_rejectlog option.
7512 76. When a system filter was run not as root (that is, when system_filter_user
7513 was set), the values of the $n variables were not being returned to the
7514 main process; thus, they were not subsequently available in the $sn
7517 77. Added +return_path_on_delivery log selector.
7519 78. A connection timeout was being treated differently from recipients deferred
7520 when testing hosts_max_try with a message that was older than the host's
7521 retry timeout. (The host should not be counted, thus allowing all hosts to
7522 be tried at least once before bouncing.) This may have been the cause of an
7523 occasionally reported bug whereby a message would remain on the queue
7524 longer than the retry timeout, but would be bounced if a delivery was
7525 forced. I say "may" because I never totally pinned down the problem;
7526 setting up timeout/retry tests is difficult. See also the next item.
7528 79. The ultimate address timeout was not being applied to errors that involved
7529 a combination of host plus message (for example, a timeout on a MAIL
7530 command). When an address resolved to a number of possible hosts, and they
7531 were not all tried for each delivery (e.g. because of hosts_max_try), a
7532 message could remain on the queue longer than the retry timeout.
7534 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7537 81. Fixed an obscure SMTP outgoing bug which required at least the following
7538 conditions: (a) there was another message waiting for the same server;
7539 (b) the server returned 5xx to all RCPT commands in the first message so
7540 that the message was not completed; (c) the server dropped the connection
7541 or gave a negative response to the RSET that Exim sends to abort the
7542 transaction. The observed case was a dropped connection after DATA that had
7543 been sent in pipelining mode. That is, the server had advertised PIPELINING
7544 but was not implementing it correctly. The effect of the bug was incorrect
7545 behaviour, such as trying another host, and this could lead to a crash.
7551 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7552 and daemon.c were passed as pointers to ints; they should have been
7553 pointers to socklen_t variables (which are typically unsigned ints).
7555 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7558 3. Fixed a really odd bug that affected only the testing scheme; patching a
7559 certain fixed string in the binary changed the value of another string that
7560 happened to be identical to the end of the original first string.
7562 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7563 name", it returns that address as the IP address. On some operating
7564 systems (e.g. Solaris), it also passes back the IP address string as the
7565 "host name". However, on others (e.g. Linux), it passes back an empty
7566 string. Exim wasn't checking for this, and was changing the host name to an
7567 empty string, assuming it had been canonicalized.
7569 5. Although rare, it is permitted to have more than one PTR record for a given
7570 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7571 all the names associated with an address, because they do in Solaris.
7572 However, it seems that they do not in Linux for data that comes from the
7573 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7574 I found this out when I moved to a new Linux workstation and tried to run
7575 the Exim test suite.
7577 To get round this problem I have changed the code so that it now does its
7578 own call to the DNS to look up PTR records when searching for a host name.
7579 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7580 addresses that are only in /etc/hosts are still found.
7582 This behaviour is, however, controlled by an option called host_lookup_
7583 order, which defaults to "bydns:byaddr". If people want to use the other
7584 order, or indeed, just use one or the other means of lookup, they can
7585 specify it in this variable.
7587 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7588 some operating systems, this comes back from gethostbyaddr() as an empty
7589 string, and this is what Exim used to test for. However, it seems that in
7590 other systems, "." is yielded. Exim now tests for this case too.
7592 7. The values of check_spool_space and check_log_space are now held internally
7593 as a number of kilobytes instead of an absolute number of bytes. If a
7594 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7595 kilobyte. This means that much larger values can be stored.
7597 8. Exim monitor: an attempt to get the action menu when not actually pointing
7598 at a message produces an empty menu entitled "No message selected". This
7599 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7600 no entries in it ("Shell widget menu has zero width and/or height"). So I
7601 have added a single, blank menu entry in this case.
7603 9. Added ${quote_local_part.
7605 10. MIME decoding is now applied to the contents of Subject: header lines when
7608 11. Now that a reference to $sender_host_address automatically causes a reverse
7609 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7610 host lookup before query-style lookups in lists that might use this
7611 variable. This has therefore been abolished, and the "net-" prefix is no
7612 longer necessary for query-style lookups.
7614 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7615 have been a typo for LFLAGS, so it has been changed.
7617 13. The install script calls Exim with "-C /dev/null" in order to find the
7618 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7619 to be output. However, since Exim outputs its version number before the
7620 error, it didn't break the script. It just looked ugly. I fixed this by
7621 always allowing "-C /dev/null" if the caller is root.
7623 14. Ignore overlarge ACL variable number when reading spool file - insurance
7624 against a later release with more variables having written the file.
7626 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7627 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7628 this, as well as the form without the "IPv6" on the front.
7630 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7631 OS/Makefile-Darwin file.
7633 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7634 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7636 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7637 variable. However, some OS use ints for inodes. I've added cast to long int
7638 to get rid of the compiler warning.
7640 19. I had forgotten to lock out "/../" in configuration file names when
7641 ALT_CONFIG_PREFIX was set.
7643 20. Routers used for verification do not need to specify transports. However,
7644 if such a router generated a host list, and callout was configured, Exim
7645 crashed, because it could not find a port number from the (non-existent)
7646 transport. It now assumes port 25 in this circumstance.
7648 21. Added the -t option to exigrep.
7650 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7651 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7652 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7653 them is set, LOOKUP_LSEARCH is forced.
7655 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7657 24. Added sender and host information to the "rejected by local_scan()" log
7658 line; previously there was no indication of these.
7660 25. Added .include_if_exists.
7662 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7663 Linux. It turns out that not all file systems support this. Apparently some
7664 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7665 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7666 not supported on the file descriptor, is now ignored when Exim is trying to
7667 sync a directory. This applies only to Linux.
7669 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7671 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7672 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7675 29. Added support for maildirsize files from supplied patch (modified a bit).
7677 30. The use of :fail: followed by an empty string could lead Exim to respond to
7678 sender verification failures with (e.g.):
7680 550 Verification failed for <xxx>
7681 550 Sender verify failed
7683 where the first response line was missing the '-' that indicates it is not
7684 the final line of the response.
7686 31. The loop for finding the name of the user that called Exim had a hardwired
7687 limit of 10; it now uses the value of finduser_retries, which is used for
7688 all other user lookups.
7690 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7693 33. Exim was neglecting to zero errno before one call of strtol() when
7694 expanding a string and expecting an integer value. On some systems this
7695 resulted in spurious "integer overflow" errors. Also, it was casting the
7696 result into an int without checking.
7698 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7699 did not work. The code looks as if it has *never* worked, though it appears
7700 to have been documented since at least release 1.62. I have made it work.
7702 35. The "timeout_DNS" error in retry rules, also documented since at least
7703 1.62, also never worked. As it isn't clear exactly what this means, and
7704 clearly it isn't a major issue, I have abolished the feature by treating it
7705 as "timeout", and writing a warning to the main and panic logs.
7707 36. The display of retry rules for -brt wasn't always showing the error code
7710 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7711 timeout_connect_A, timeout_connect_MX.
7713 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7714 to the empty sender.
7716 39. The daemon was not analysing the content of -oX till after it had closed
7717 stderr and disconnected from the controlling terminal. This meant that any
7718 syntax errors were only noted on the panic log, and the return code from
7719 the command was 0. By re-arranging the code a little, I've made the
7720 decoding happen first, so such errors now appear on stderr, and the return
7721 code is 1. However, the actual setting up of the sockets still happens in
7722 the disconnected process, so errors there are still only recorded on the
7725 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7726 connections (as happens on some IP stacks) was logged at start up time as
7727 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7728 it from "IPv6 and IPv4", which means that two separate sockets are being
7731 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7732 says whether AF_INET or AF_INET6 was passed as an argument.
7734 42. Exiwhat output was messed up when time zones were included in log
7737 43. Exiwhat now gives more information about the daemon's listening ports,
7738 and whether -tls-on-connect was used.
7740 44. The "port" option of the smtp transport is now expanded.
7742 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7743 silently ignored. Now an error message is written to the main and panic
7746 46. There's a new ACL modifier called "logwrite" which writes to a log file
7747 as soon as it is encountered.
7749 47. Added $local_user_uid and $local_user_gid at routing time.
7751 48. Exim crashed when trying to verify a sender address that was being
7754 49. Exim was recognizing only a space character after ".include". It now also
7755 recognizes a tab character.
7757 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7758 extracting the relevant information from the specification. The man page no
7759 longer contains scrambled data for the -d option, and I've added a section
7760 at the front about calling Exim under different names.
7762 51. Added "extra_headers" argument to the "mail" command in filter files.
7764 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7767 53. Installed eximstats 1.29.
7769 54. Added transport_filter_timeout as a generic transport option.
7771 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7772 Cc: header lines. This was required by RFC 822, but it not required by RFC
7775 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7776 incoming messages that did not have them. Now it does so only if the
7777 message originates locally, that is, if there is no associated remote host
7778 address. When Resent- header lines are present, this applies to the Resent-
7779 lines rather than the non-Resent- lines.
7781 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7782 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7784 58. Messages for configuration errors now include the name of the main
7785 configuration file - useful now that there may be more than one file in a
7786 list (.included file names were always shown).
7788 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7789 for those rare installations that do not start the daemon as root or run it
7790 setuid root. I've cut out the call to initgroups() if the daemon is not
7793 60. The Exim user and group can now be bound into the binary as text strings
7794 that are looked up at the start of Exim's processing.
7796 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7798 62. Added $mailstore_basename variable.
7800 63. Installed patch to sieve.c from Michael Haardt.
7802 64. When Exim failed to open the panic log after failing to open the main log,
7803 the original message it was trying to log was written to stderr and debug
7804 output, but if they were not available (the usual case in production), it
7805 was lost. Now it is written to syslog before the two lines that record the
7806 failures to open the logs.
7808 65. Users' Exim filters run in subprocesses under the user's uid. It is
7809 possible for a "deliver" command or an alias in a "personal" command to
7810 provoke an address rewrite. If logging of address rewriting is configured,
7811 this fails because the process is not running as root or exim. There may be
7812 a better way of dealing with this, but for the moment (because 4.30 needs
7813 to be released), I have disabled address rewrite logging when running a
7814 filter in a non-root, non-exim process.
7820 1. The buildconfig auxiliary program wasn't quoting the value set for
7821 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7822 not defined. This bug was masked in 4.22 by the effect that was fixed in
7825 2. Some messages that were rejected after a message id was allocated were
7826 shown as "incomplete" by exigrep. It no longer does this for messages that
7827 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7829 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7830 have allow_domain_literals set, the ID did not get logged in the <= line.
7831 Domain literals are now always recognized in Message-ID: header lines.
7833 4. The first argument for a ${extract expansion item is the key name or field
7834 number. Leading and trailing spaces in this item were not being ignored,
7835 causing some misleading effects.
7837 5. When deliver_drop_privilege was set, single queue runner processes started
7838 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7839 same command in the process it spins off) were not dropping privilege.
7841 6. When the daemon running as "exim" started a queue runner, it always
7842 re-executed Exim in the spun-off process. This is a waste of effort when
7843 deliver_drop_privilege is set. The new process now just calls the
7844 queue-runner function directly.
7850 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7853 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7854 ignored. Though the use of -oP was forcing the writing of a pid file, it
7855 was always written to the default place.
7857 3. If the message "no IP address found for host xxxx" is generated during
7858 incoming verification, it is now followed by identification of the incoming
7859 connection (so you can more easily find what provoked it).
7861 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7863 5. Added some features to "harden" Exim a bit more against certain attacks:
7865 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7866 be put in Local/Makefile. This is like the never_users runtime option,
7867 but it cannot be overridden. The default setting is "root".
7869 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7870 prefix string with which any file named in a -C command line option
7873 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7874 is retained for -C and -D only if the caller of Exim is root. Without
7875 it, the exim user may also use -C and -D and retain privilege.
7877 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7878 command line option is disabled.
7880 6. Macro names set by the -D option must start with an upper case letter, just
7881 like macro names defined in the configuration file.
7883 7. Added "dereference=" facility to LDAP.
7885 8. Two instances of the typo "uknown" in the source files are fixed.
7887 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7888 the Configure-Makefile script screwed up while processing it.
7890 10. Incorporated PCRE 4.4.
7892 11. The SMTP synchronization check was not operating right at the start of an
7893 SMTP session. For example, it could not catch a HELO sent before the client
7894 waited for the greeting. There is now a check for outstanding input at the
7895 point when the greeting is written. Because of the duplex, asynchronous
7896 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7897 way, but not yet received, when the check is performed.
7899 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7900 on TCP/IP sockets, because this apparently causes some broken clients to
7903 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7904 unchanged) from the Cygwin maintainer.
7906 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7907 was supported instead of testing for mbx. Effectively a typo.
7909 15. The spa authenticator server code was not checking that the input it
7910 received was valid base64.
7912 16. The debug output line for the "set" modifier in ACLs was not showing the
7913 name of the variable that was being set.
7915 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7917 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7918 lookup on its own. Something else was needed to trigger the lookup. For
7919 example, a match in host_lookup or the need for a host name in a host list.
7920 Now, if $sender_host_name is referenced and the host name has not yet been
7921 looked up, a lookup is performed. If the lookup fails, the variable remains
7922 empty, and $host_lookup_failed is set to "1".
7924 19. Added "eqi" as a case-independent comparison operator.
7926 20. The saslauthd authentication condition could segfault if neither service
7927 nor realm was specified.
7929 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7930 error message that was logged was misleading, and incoming SMTP
7931 connections were dropped. The message is now more accurate, and temporary
7932 errors are given to SMTP connections.
7934 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7935 (except RSET) with a 421 error, until QUIT is received. However, it was
7936 failing to send a response to QUIT.
7938 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7939 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7940 ACL is now run after the helo_try_verify_hosts code.
7942 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7943 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7944 case-independent, so other case variants are also recognized). Apparently
7945 some systems use these upper case variants.
7947 25. If more than two messages were waiting for the same host, and a transport
7948 filter was specified for the transport, Exim sent two messages over the
7949 same TCP/IP connection, and then failed with "socket operation on non-
7950 socket" when it tried to send the third.
7952 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7954 27. The extern definition of crypt16() in expand.c was not being excluded when
7955 the OS had its own crypt16() function.
7957 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7958 as a preferred synonym for return_size_limit, both as an option and as an
7961 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7963 30. Changed the default configuration ACL to relax the local part checking rule
7964 for addresses that are not in any local domains. For these addresses,
7965 slashes and pipe symbols are allowed within local parts, but the sequence
7966 /../ is explicitly forbidden.
7968 31. SPA server authentication was not clearing the challenge buffer before
7971 32. log_message in a "warn" ACL statement was writing to the reject log as
7972 well as to the main log, which contradicts the documentation and doesn't
7973 seem right (because no rejection is happening). So I have stopped it.
7975 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7976 However, I am unable to do any testing of this.
7978 34. Fixed an infelicity in the appendfile transport. When checking directories
7979 for a mailbox, to see if any needed to be created, it was accidentally
7980 using path names with one or more superfluous leading slashes; tracing
7981 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7983 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7984 contents are added to the log line that is written for every discarded
7985 recipient. (Previously a log_message setting was ignored.)
7987 36. The ${quote: operator now quotes the string if it is empty.
7989 37. The install script runs exim in order to find its version number. If for
7990 some reason other than non-existence or emptiness, which it checks, it
7991 could not run './exim', it was installing it with an empty version number,
7992 i.e. as "exim-". This error state is now caught, and the installation is
7995 38. An argument was missing from the function that creates an error message
7996 when Exim fails to connect to the socket for saslauthd authentication.
7997 This could cause Exim to crash, or give a corrupted message.
7999 39. Added isip, isip4, and isip6 to ${if conditions.
8001 40. The ACL variables $acl_xx are now saved with the message, and can be
8002 accessed later in routers, transports, and filters.
8004 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
8005 strings in the file are not string-expanded.
8007 42. If a MAIL command specified a SIZE value that was too large to fit into an
8008 int variable, the check against message_size_limit failed. Such values are
8009 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
8010 day this will have to be increased, but I don't think I want to be around
8011 when emails are that large.
8018 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
8019 iconv() is not standard in FreeBSD.
8021 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
8022 IPv6 enabled. The observed symptom was a segmentation fault on return from
8023 the function os_common_find_running_interfaces() in src/os.c.
8025 3. In the check_special_case() function in daemon.c I had used "errno" as an
8026 argument name, which causes warnings on some systems. This was basically a
8027 typo, since it was named "eno" in the comments!
8029 4. The code that waits for the clock to tick (at a resolution of some fraction
8030 of a second) so as to ensure message-id uniqueness was always waiting for
8031 at least one whole tick, when it could have waited for less. [This is
8032 almost certainly not relevant at current processor speeds, where it is
8033 unlikely to ever wait at all. But we try to future-proof.]
8035 5. The function that sleeps for a time interval that includes fractions of a
8036 second contained a race. It did not block SIGALRM between setting the
8037 timer, and suspending (a couple of lines later). If the interval was short
8038 and the sigsuspend() was delayed until after it had expired, the suspension
8039 never ended. On busy systems this could lead to processes getting stuck for
8042 6. Some uncommon configurations may cause a lookup to happen in a queue runner
8043 process, before it forks any delivery processes. The open lookup caching
8044 mechanism meant that the open file or database connection was passed into
8045 the delivery process. The problem was that delivery processes always tidy
8046 up cached lookup data. This could cause a problem for the next delivery
8047 process started by the queue runner, because the external queue runner
8048 process does not know about the closure. So the next delivery process
8049 still has data in the lookup cache. In the case of a file lookup, there was
8050 no problem because closing a file descriptor in a subprocess doesn't affect
8051 the parent. However, if the lookup was caching a connection to a database,
8052 the connection was closed, and the second delivery process was likely to
8053 see errors such as "PGSQL: query failed: server closed the connection
8054 unexpectedly". The problem has been fixed by closing all cached lookups
8055 in a queue runner before running a delivery process.
8057 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
8058 seem to have the "const" qualifier which it has on other OS. I've
8061 8. Change 4.21/2 was too strict. It is only if there are two authenticators
8062 *of the same type* (client or server) with the same public name that an
8063 error should be diagnosed.
8065 9. When Exim looked up a host name for an IP address, but failed to find the
8066 original IP address when looking up the host name (a safety check), it
8067 output the message "<ip address> does not match any IP for NULL", which was
8068 confusing, to say the least. The bug was that the host name should have
8069 appeared instead of "NULL".
8071 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
8072 user that is built into the binary, and the -C or -D options is used, root
8073 privilege is dropped before the configuration file is read. In addition,
8074 logging is switched to stderr instead of the normal log files. If the
8075 configuration then re-defines the Exim user, the unprivileged environment
8076 is probably not what is expected, so Exim logs a panic warning message (but
8079 However, if deliver_drop_privilege is set, the unprivileged state may well
8080 be exactly what is intended, so the warning has been cut out in that case,
8081 and Exim is allowed to try to write to its normal log files.
8087 1. smtp_return_error_details was not giving details for temporary sender
8088 or receiver verification errors.
8090 2. Diagnose a configuration error if two authenticators have the same public
8093 3. Exim used not to create the message log file for a message until the first
8094 delivery attempt. This could be confusing when incoming messages were held
8095 for policy or load reasons. The message log file is now created at the time
8096 the message is received, and an initial "Received" line is written to it.
8098 4. The automatically generated man page for command line options had a minor
8099 bug that caused no ill effects; however, a more serious problem was that
8100 the procedure for building the man page automatically didn't always
8101 operate. Consequently, release 4.20 contains an out-of-date version. This
8102 shouldn't happen again.
8104 5. When building Exim with embedded Perl support, the script that builds the
8105 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8106 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8108 6. The freeze_tell option was not being used for messages that were frozen on
8109 arrival, either by an ACL or by local_scan().
8111 7. Added the smtp_incomplete_transaction log selector.
8113 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8114 was accepting AUTH without a new EHLO.
8116 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8117 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8120 10. Logging of TCP/IP connections (when configured) now happens in the main
8121 daemon process instead of the child process, so that the TCP/IP connection
8122 count is more accurate (but it can never be perfect).
8124 11. The use of "drop" in a nested ACL was not being handled correctly in the
8125 outer ACL. Now, if condition failure induced by the nested "drop" causes
8126 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8127 or "require"), the connection is dropped.
8129 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8130 that yield "discard" can now be used with an "accept" or a "discard" verb,
8131 but an error is generated for any others (because I can't see a useful way
8132 to define what should happen).
8134 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8135 are now processed in the same way as lines in the Exim configuration file.
8136 In particular, continuation lines are supported.
8138 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8140 15. Added -ti meaning -t -i.
8142 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8143 domains, and warn by logging if others are found.
8145 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8146 returned from GIFCONF when Exim is trying to find the list of interfaces on
8147 a host. The code in os.c has been modified to copy each ifreq to an aligned
8148 structure in all cases.
8150 Also, in some cases, the returned ifreq's were being copied to a 'struct
8151 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8152 means the last couple of bytes of an IPv6 address could be chopped if the
8153 ifreq contained only a normal sockaddr (14 bytes storage).
8155 18. Named domain lists were not supported in the hosts_treat_as_local option.
8156 An entry such as +xxxx was not recognized, and was treated as a literal
8159 19. Ensure that header lines added by a DATA ACL are included in the reject log
8160 if the ACL subsequently rejects the message.
8162 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8163 MD5 (which is deprecated).
8165 21. When testing a filter file using -bf, Exim was writing a message when it
8166 took the sender from a "From " line in the message, but it was not doing so
8167 when it took $return_path from a Return-Path: header line. It now does.
8169 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8170 with a valid header line field name (a series of printing characters
8171 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8173 23. Changed "disc" in the source to "disk" to conform to the documentation and
8174 the book and for uniformity.
8176 24. Ignore Sendmail's -Ooption=value command line item.
8178 25. When execve() failed while trying to run a command in a pipe transport,
8179 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8180 could be confused with a return value of 69 from the command itself. This
8181 has been changed to 127, the value the shell returns if it is asked to run
8182 a non-existent command. The wording for the related log line suggests a
8183 non-existent command as the problem.
8185 26. If received_header_text expands to an empty string, do not add a Received:
8186 header line to the message. (Well, it adds a token one on the spool, but
8187 marks it "old" so that it doesn't get used or transmitted.)
8189 27. Installed eximstats 1.28 (addition of -nt option).
8191 28. There was no check for failure on the call to getsockname() in the daemon
8192 code. This can fail if there is a shortage of resources on the system, with
8193 ENOMEM, for example. A temporary error is now given on failure.
8195 29. Contrary to the C standard, it seems that in some environments, the
8196 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8197 program. Exim now does this explicitly; it affects the formatting of
8198 timestamps using strftime().
8200 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8201 complaints. I've now initialized all the variables, to avoid this.
8203 32. Header lines added by a system filter were not being "seen" during
8204 transport-time rewrites.
8206 33. The info_callback() function passed to OpenSSL is set up with type void
8207 (*)(SSL *, int, int), as described somewhere. However, when calling the
8208 function (actually a macro) that sets it up, the type void(*)() is
8209 expected. I've put in a cast to prevent warnings from picky compilers.
8211 34. If a DNS black list lookup found a CNAME record, but there were no A
8212 records associated with the domain it pointed at, Exim crashed.
8214 35. If a DNS black list lookup returned more than one A record, Exim ignored
8215 all but the first. It now scans all returned addresses if a particular IP
8216 value is being sought. In this situation, the contents of the
8217 $dnslist_value variable are a list of all the addresses, separated by a
8220 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8221 to accept a host name and all its aliases if the forward lookup for any of
8222 them yielded the IP address of the incoming connection. Now it accepts only
8223 those names whose forward lookup yields the correct IP address. Any other
8224 names are discarded. This closes a loophole whereby a rogue DNS
8225 administrator could create reverse DNS records to break through a
8226 wildcarded host restriction in an ACL.
8228 37. If a user filter or a system filter that ran in a subprocess used any of
8229 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8230 the wrong values were passed to the pipe command ($thisaddress had the
8231 value of $0, $0 had the value of $1, etc). This bug was introduced by
8232 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8234 38. Improved the line breaking for long SMTP error messages from ACLs.
8235 Previously, if there was no break point between 40 and 75 characters, Exim
8236 left the rest of the message alone. Two changes have been made: (a) I've
8237 reduced the minimum length to 35 characters; (b) if it can't find a break
8238 point between 35 and 75 characters, it looks ahead and uses the first one
8239 that it finds. This may give the occasional overlong line, but at least the
8240 remaining text gets split now.
8242 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8243 file descriptors might be low, and that setting 1000 would always raise it.
8244 It turns out that in some environments, the limit is already over 1000 and
8245 that lowering it causes trouble. So now Exim takes care not to decrease it.
8247 40. When delivering a message, the value of $return_path is set to $sender_
8248 address at the start of routing (routers may change the value). By an
8249 oversight, this default was not being set up when an address was tested by
8250 -bt or -bv, which affected the outcome if any router or filter referred to
8253 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8254 log only when "message" or "log_message" are set. However, if one of the
8255 conditions was an address verification, or a call to a nested ACL, the
8256 messages generated by the underlying test were being passed through. This
8257 no longer happens. The underlying message is available in $acl_verify_
8258 message for both "message" and "log_message" expansions, so it can be
8259 passed through if needed.
8261 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8262 new expansion $bh_ to give the encoded byte string without charset
8263 translation. Translation happens only if iconv() is available; HAVE_ICONV
8264 indicates this at build time. HEADERS_CHARSET gives the charset to
8265 translate to; headers_charset can change it in the configuration, and
8266 "headers charset" can change it in an individual filter file.
8268 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8269 that creates RFC 2047 encoded "words" labels them as that charset instead
8270 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8271 expansion operator; (ii) when Exim creates a From: line for a local
8272 message; (iii) when a header line is rewritten to include a "phrase" part.
8274 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8275 buggy, causing it to skip the first lines of messages whose message ID
8276 ended in 'D'. This would not have bitten before Exim release 4.14, because
8277 message IDs were unlikely to end in 'D' before then. The effect was to have
8278 incorrect size information for certain domains.
8280 45. #include "config.h" was missing at the start of the crypt16.c module. This
8281 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8284 46. If there was a timeout during a "random" callout check, Exim treated it as
8285 a failure of the random address, and carried on sending RSET and the real
8286 address. If the delay was just some slowness somewhere, the response to the
8287 original RCPT would be taken as a response to RSET and so on, causing
8288 mayhem of various kinds.
8290 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8291 when I implemented it. It didn't allow for the fact that some option values
8292 may legitimately be negative (e.g. size_addition), and it didn't even do
8293 the right test for positive values.
8295 48. Domain names in DNS records are case-independent. Exim always looks them up
8296 in lower case. Some resolvers return domain names in exactly the case they
8297 appear in the zone file, that is, they may contain uppercase letters. Not
8298 all resolvers do this - some return always lower case. Exim was treating a
8299 change of case by a resolver as a change of domain, similar to a widening
8300 of a domain abbreviation. This triggered its re-routing code and so it was
8301 trying to route what was effectively the same domain again. This normally
8302 caused routing to fail (because the router wouldn't handle the domain
8303 twice). Now Exim checks for this case specially, and just changes the
8304 casing of the domain that it ultimately uses when it transmits the message
8307 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8310 50. If a filter generated a file delivery with a non-absolute name (possible if
8311 no home directory exists for the router), the forbid_file option was not
8314 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8315 the existing equality matching.
8317 52. Exim was using ints instead of ino_t variables in some places where it was
8318 dealing with inode numbers.
8320 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8321 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8322 called TMPDIR, and if it finds it is different, it changes its value.
8324 54. The smtp_printf() function is now made available to local_scan() so
8325 additional output lines can be written before returning. There is also an
8326 smtp_fflush() function to enable the detection of a dropped connection.
8327 The variables smtp_input and smtp_batched_input are exported to
8330 55. Changed the default runtime configuration: the message "Unknown user"
8331 has been removed from the ACL, and instead placed on the localuser router,
8332 using the cannot_route_message feature. This means that any verification
8333 failures that generate their own messages won't get overridden. Similarly,
8334 the "Unrouteable address" message that was in the ACL for unverifiable
8335 relay addresses has also been removed.
8337 56. Added hosts_avoid_esmtp to the smtp transport.
8339 57. The exicyclog script was not checking for the esoteric option
8340 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8341 will work only if exicyclog is run under the appropriate euid.
8343 58. Following a discussion on the list, the rules by which Exim recognises line
8344 endings on incoming messages have been changed. The -dropcr and drop_cr
8345 options are now no-ops, retained only for backwards compatibility. The
8346 following line terminators are recognized: LF CRLF CR. However, special
8347 processing applies to CR:
8349 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8350 nor a local message in the state where . is a terminator.
8352 (ii) If a bare CR is encountered in a header line, an extra space is added
8353 after the line terminator so as not to end the header. The reasoning
8354 behind this is that bare CRs in header lines are most likely either
8355 to be mistakes, or people trying to play silly games.
8357 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8358 was being incorrectly given as 18 bytes larger than it should have been.
8359 This is a VOB (very old bug).
8361 60. This may never have affected anything current, but just in case it has:
8362 When the local host is found other than at the start of a list of hosts,
8363 the local host, those with the same MX, and any that follow, are discarded.
8364 When the list in question was part of a longer list of hosts, the following
8365 hosts (not currently being processed) were also being discarded. This no
8366 longer happens. I'm not sure if this situation could ever has previously
8369 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8372 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8373 header. This is something that is recommended in a new Internet Draft, and
8374 is something that is documented as being done by Sendmail. There are two
8375 possible values. For messages generated by the autoreply transport, Exim
8378 Auto-Submitted: auto-replied
8380 whereas for all other generated messages (e.g. bounces) it adds
8382 Auto-Submitted: auto-generated
8384 63. The "personal" condition in filters now includes a test for the
8385 Auto-Submitted: header. If it contains the string "auto-" the message it
8386 not considered personal.
8388 64. Added rcpt_include_affixes as a generic transport option.
8390 65. Added queue_only_override (default true).
8392 66. Added the syslog_duplication option.
8394 67. If what should have been the first header line of a message consisted of
8395 a space followed by a colon, Exim was mis-interpreting it as a header line.
8396 It isn't of course - it is syntactically invalid and should therefore be
8397 treated as the start of the message body. The misbehaviour could have
8398 caused a number of strange effects, including loss of data in subsequent
8399 header lines, and spool format errors.
8401 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8402 client host had authenticated. This control can now be exercised by an ACL
8403 for more flexibility.
8405 69. By default, callouts do not happen when testing with -bh. There is now a
8406 variant, -bhc, which does actually run the callout code, including
8407 consulting and updating the callout cache.
8409 70. Added support for saslauthd authentication, courtesy of Alexander
8412 71. If statvfs() failed on the spool or log directories while checking their
8413 size for availability, Exim confusingly gave the error "space shortage".
8414 Furthermore, in debugging mode it crashed with a floating point exception.
8415 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8416 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8417 serious problem, Exim now writes to the main and panic logs when this
8418 happens, with details of the failure. It then refuses to accept the
8419 incoming message, giving the message "spool directory problem" or "log
8420 directory problem" with a 421 code for SMTP messages.
8422 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8423 0, 1, and 2 exist, because some OS complain for execs without them (see
8424 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8425 descriptors. However, the code omitted to check that the open succeeded,
8426 causing mysterious errors if for some reason the permissions on /dev/null
8427 got screwed. Now Exim writes a message to the main and panic logs, and
8428 bombs out if it can't open /dev/null.
8430 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8431 interact so that it is all more flexible. It is supposed to remain
8432 backwards compatible. Also added extra_local_interfaces.
8434 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8435 to bomb out with an assertion failure - to the client this appears as a
8436 connection drop. This problem occurs in the part of the code that was taken
8437 from the Samba project. Fortunately, the assertion is in a very simple
8438 function, so I have fixed this by reproducing the function inline in the
8439 one place where it is called, and arranging for authentication to fail
8440 instead of killing the process with assert().
8442 75. The SPA client code was not working when the server requested OEM rather
8443 than Unicode encoding.
8445 76. Added code to make require_files with a specific uid setting more usable in
8446 the case where statting the file as root fails - usually a non-root-mounted
8447 NFS file system. When this happens and the failure is EACCES, Exim now
8448 forks a subprocess and does the per-uid checking as the relevant uid.
8450 77. Added process_log_path.
8452 78. If log_file_path was not explicitly set, a setting of check_log_space or
8453 check_log_inodes was ignored.
8455 79. If a space check for the spool or log partitions fails, the incident is now
8456 logged. Of course, in the latter case the data may get lost...
8458 80. Added the %p formatting code to string_format() so that it can be used to
8459 print addresses in debug_print(). Adjusted all the address printing in the
8460 debugging in store.c to use %p rather than %d.
8462 81. There was a concern that a line of code in smtp_in.c could overflow a
8463 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8464 initially expressed, the concern was not well-founded, because trailing
8465 spaces are removed early. However, if the trailing spaces were followed by
8466 a NULL, they did not get removed, so the overflow was possible. Two fixes
8469 (a) I re-wrote the offending code in a cleaner fashion.
8470 (b) If an incoming SMTP command contains a NULL character, it is rejected
8473 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8474 runs initgroups(), so that if the Exim user is in any additional groups,
8475 they will be used during message reception.
8481 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob