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 This is a security release.
10 JH/01 Bug 2999: Fix a possible OOB write in the external authenticator, which
11 could be triggered by externally-supplied input. Found by Trend Micro.
14 JH/02 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
15 be triggered by externally-controlled input. Found by Trend Micro.
18 JH/03 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
19 be triggered by externally-controlled input. Found by Trend Micro.
26 JH/01 Move the wait-for-next-tick (needed for unique messmage IDs) from
27 after reception to before a subsequent reception. This should
28 mean slightly faster delivery, and also confirmation of reception
31 JH/02 Move from using the pcre library to pcre2. The former is no longer
32 being developed or supported (by the original developer).
34 JH/03 Constification work in the filters module required a major version
35 bump for the local-scan API. Specifically, the "headers_charset"
36 global which is visible via the API is now const and may therefore
37 not be modified by local-scan code.
39 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
40 sendfile() didi not account for the way the ClamAV driver code called it.
42 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
43 time check was being done for every character; replace that with one
46 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
47 sent was prefixed with a length byte.
49 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
50 RFC 5321. Previously Dovecot (at least) would log errors during
53 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
54 in 4.61 without a reason logged. Binaries will be bigger, which might
55 matter on diskspace-constrained systems, but debug is easier.
57 JH/09 Fix macro-definition during "-be" expansion testing. The move to
58 write-protected store for macros had not accounted for these runtime
59 additions; fix by removing this protection for "-be" mode.
61 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
62 handing out large-numbered file descriptors, violating the usual Unix
63 assumption (and required by Posix) that the lowest possible number will be
64 allocated by the kernel when a new one is needed. In the daemon, and any
65 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
66 are not useable for FD_SET() [and hence select()] and overwrite the stack.
67 Assorted crashes happen.
69 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
70 main-section options or in a connect ACL, the value from the first ever
71 connection was never replaced for subsequent connections. Found by
74 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
75 though only once PCRE2 was introduced: the memory accounting used under
76 debug offset allocations by an int, giving a hard trap in early startup.
77 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
79 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
80 with underbars is given. The write-protection of configuration introduced
81 in 4.95 trapped when normalisation was applied to an option not needing
84 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
86 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
87 failing to close the certificates directory, every hour or any time it
90 JH/16 Debugging initiated by an ACL control now continues through into routing
91 and transport processes. Previously debugging stopped any time Exim
92 re-execs, or for processing a queued message.
94 JH/17 The "expand" debug selector now gives more detail, specifically on the
95 result of expansion operators and items.
97 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
98 bad comparison between the option value and the name of the file to
99 be included was done, and a mismatch was wrongly identified.
100 4.88 to 4.95 are affected.
102 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
104 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
105 supplied as the db file-pair basename. Previously, if a directory
106 path was given, for example via the autoreply "once" option, the DB
107 file.pag and file.dir files would be created in that directory's
110 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
111 "taint" log_selector. These were previously deprecated.
113 JH/22 Fix static address-list lookups to properly return the matched item.
114 Previously only the domain part was returned.
116 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
117 the call into OpenSSL to send a TLS Close was being repeated; this
118 resulted in the library waiting for the peer's Close. If that was never
119 sent we waited forever. Fix by tracking send calls.
121 JH/24 The ${run} expansion item now expands its command string elements after
122 splitting. Previously it was before; the new ordering makes handling
123 zero-length arguments simpler. The old ordering can be obtained by
124 appending a new option "preexpand", after a comma, to the "run".
126 JH/25 Taint-check exec arguments for transport-initiated external processes.
127 Previously, tainted values could be used. This affects "pipe", "lmtp" and
128 "queryprogram" transport, transport-filter, and ETRN commands.
129 The ${run} expansion is also affected: in "preexpand" mode no part of
130 the command line may be tainted, in default mode the executable name
133 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
134 the the facility was not passed across execs, and only the first message
135 passed over a connection could use BDAT; any further ones using DATA.
137 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
138 uses $sending_ip_address and an interface is specified.
139 Previously any use of the local address in the EHLO name disabled
140 PIPECONNECT, the common case being to use the rDNS of it.
142 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
143 resumption. Previously verify failed because no certificate status is
144 passed on the wire for the restarted session. Fix by using the recorded
145 ocsp status of the stored session for the new connection.
147 JH/29 TLS resumption: the key for session lookup in the client now includes
148 more info that a server could potentially use in configuring a TLS
149 session, avoiding oferring mismatching sessions to such a server.
150 Previously only the server IP was used.
152 JH/30 Fix string_copyn() for limit greater than actual string length.
153 Previously the copied amount was the limit, which could result in a
154 overlapping memcpy for newly allocated destination soon after a
155 source string shorter than the limit. Found/investigated by KM.
157 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
158 close; it may be needed for a subsequent connection. This caused a
159 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
161 JH/32 Fix CHUNKING for a second message on a connection when the first was
162 rejected. Previously we did not reset the chunking-offered state, and
163 erroneously rejected the BDAT command. Investigation help from
166 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
167 an empty address. Previously the expansion returned an error.
169 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
170 proxy. Previously these were misparsed, leading to paniclog entries.
176 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
177 related applications. Previously an "H" was used where available info
178 says that "M" should be, so change to match.
180 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
181 as arguments, so an implementation trying to copy these into a local
182 buffer was taking a taint-enforcement trap. Fix by using dynamically
183 created buffers. Similar fix for radius expansion condition.
185 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
186 reasonable, eg. to count headers. Fix by using dynamically created
187 buffers rather than a local. Do similar fixes for ACL actions "dcc",
188 "log_reject_target", "malware" and "spam"; the arguments are expanded
189 so could be handling tainted values.
191 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
192 broken the (no-op) support for this sendmail command. Restore it
193 to doing nothing, silently, and returning good status.
195 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
196 record path was given (or the default used) without a leading directory
197 path, an error occurred on trying to open it. Use the transport's working
200 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
201 transport. Previously it was the name on the DNS A-record; use instead
202 the head of the CNAME chain leading there (if there is one). This seems
203 to align better with RFC 6125.
205 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
206 smtp_accept_max_per_host allocated resources which were not released
207 when the limit was exceeded. This eventually crashed the daemon. Fix
208 by adding a release action in that path.
210 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
211 expanded; previously using tainted values was rejected. Fix by using
212 dynamically-created buffers.
214 JH/09 Relax restrictions on ACL verify condition needing access to message
215 headers. Previously they were only permitted in data and non-smtp ACLs;
216 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
217 not_blind, header_sender and header_names_ascii verification.
219 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
220 Previously a macro used one argument twice; when called with the
221 argument as an expression having side-effects, incorrect operation
222 resulted. Use an inlineable function.
224 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
225 held open for a verify callout. Previously this wan not accounted for
226 and a corrupt onward SMTP conversation resulted.
228 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
229 Previously they were embedded naively in the constructed address; when
230 needed, strip the quoting and quote the entire local_part.
231 Also make the inbound_srs expansion condition handle quoting.
233 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
234 excluded, not matching the documentation.
236 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
237 was given for the sqlite_dbfile a trap resulted.
239 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
240 "name" argument resulted in a trap. There is no reason to disallow such;
241 this was a coding error.
243 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
244 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
245 spent suspended, ignoring the POSIX definition. Previously we assumed
246 it did and a constant offset from real time could be used as a correction.
247 Change to using the same clock source for the start-of-message and the
248 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
249 exists, just to get a clock slightly more aligned to reality.
251 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
252 RFC says it is optional some validators care. The missing char was not
253 intended but triggered by a line-wrap alignment. Discovery and fix by
254 Guillaume Outters, hacked on by JH.
256 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
257 name being quoted was tainted a trap would be taken. Fix by using
258 dynamically created buffers. The routine could have been called by a
259 rewrite with the "h" flag, by using the "-F" command-line option, or
260 by using a "name=" option on a control=submission ACL modifier.
262 JH/19 SPF: change the Authentication-Results expansion component to give
263 smtp.helo when the sender domain is empty. Previously it gave
266 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
267 not in 127.0.0.0/8 to help in spotting list domains taken over by a
268 domain-parking registrar.
270 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
271 Previously when a whitespace character was specified it was not inserted
272 after removing the newline.
274 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
275 the domain part of the recipient address. This overrides any tls_sni
276 option set, which was previously used.
278 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
281 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
282 is_tainted() had an off-by-one error in the overenthusiastic direction.
283 Find and fix by Gavan. Although NetBSD is not a supported platform for
284 4.94 this bug could affect other platforms.
286 PP/01 Fix default prime selection to be consistent.
287 One path used ike23 still, instead of exim.dev.20160529.3; now both
288 execution flows will use the same DH primes (currently
289 exim.dev.20160529.3).
291 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
292 option in smtp transport, to match the documentation. Previously
293 verification was not being done in some cases where it should have been.
295 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
296 than one server was defined and depending on the platform memory layout
297 details, an internal consistency trap could be hit while walking the list
300 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
301 files. The value is used by the authresults expansion item. Previously
302 if this was used in a router or transport, a crash could result.
304 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
305 have a sufficient incidence of EINTR returns from select that an
306 interaction with other operations done by the main daemon loop exposed
307 a bug in the error-handling. This was benign apart from the log
310 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
311 for consistency with delivered "=>" and failed "**" lines. While we're
312 there, handle PRX and TFO.
314 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
315 applied. This resulted, if any header-line rewrite rules were configured,
316 in a panic-log triggerable by sending a message with a long address in
317 a header. Fix by increasing the arbitrary limit to larger than a single
318 (dewrapped) 5322 header line maximum size.
320 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
321 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
322 RFC 6648 which deprecates X- options in protocols as a general practice.
323 Changeover between the implementations is handled by the mechanisms
326 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
327 a remote which uses callout/hold. Previously the local was queued.
329 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
332 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
333 log line. The asterisk is now consistently appended to the remote IP
334 (and port, if given), and will also be provided on defer and fail log
335 lines. Previously it could be placed on the local IP if that was being
336 logged, and was only provided on delivery lines.
338 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
340 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
341 authenticator client_send option. Previously the next char, after a pair
342 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
343 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
344 documentation. There is still no way to get a leading ^ immediately
345 after a NUL (ie. for the password of a PLAIN method authenticator.
347 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
348 files. For bad sizes read, delete the record and whine to paniclog.
350 JH/38 When logging an AUTH failure, as server, do not include sensitive
351 information. Previously, the credentials would be included if given
352 as part of the AUTH command line and an ACL denied authentication.
354 JH/39 Bug 2691: fix $local_part_data. When the matching list element
355 referred to a file, bad data was returned. This likely also affected
358 JH/40 The gsasl authenticator now supports caching of the salted password
359 generated by the client-side implementation. This required the addition
360 of a new variable: $auth4.
362 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
363 left undeleted; the attempt to re-create it then failed - resulting in
364 the usual "SIGHUP tp have daemon reload configuration" to not work.
365 This affected any platform not supporting "abstract" Unix-domain
366 sockets (i.e. not Linux).
368 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
369 recipients" response to RCPT in a later response, with a 250. The
370 previous coding assumed this would not happen, and under PIPELINING
371 would result in both lost and duplicate recipients for a message.
373 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
374 Previously the weighting was incorrectly applied. Similar fix for socks
375 proxies. Found and fixed by Heiko Schlichting.
377 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
378 not handle sub-lists included using the +namedlist syntax. While
379 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
380 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
383 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
384 Previously the permanent pool was used, so the sore could not be freed.
385 This meant a connection with many messages would use continually-growing
388 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
389 per-pool so as not to waste too much space. Previously a constant size
390 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
391 DOS attacks harder. The cost is wasted memory use in the larger blocks.
393 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
394 same space repeatedly, and a smaller process footprint.
396 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
397 for GnuTLS. Previously the name started "%s" which, while not a bug,
398 looked as if if might be one.
400 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
401 "continued connection") make the $proxy_* variables available. Previously
402 the information was not passed across the exec() call for subsequent
403 transport executions. This also mean that the log lines for the
404 messages can show the proxy information.
406 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
407 receive time. With modern systems the difference is significant.
408 The historical behaviour can be restored by disabling (a new) log_selector
409 "queue_time_exclusive".
411 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
412 content) were specifically tested for. Now, also cover expansions
413 resulting in ACL names and inline ACL content.
415 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
416 making it unusable in complex expressions.
418 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
419 fail with a taint-check on the spoolfile name, and leave the message
422 HS/01 Enforce absolute PID file path name.
424 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
426 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
428 PP/02 Bug 2643: Correct TLS DH constants.
429 A missing NUL termination in our code-generation tool had led to some
430 incorrect Diffie-Hellman constants in the Exim source.
431 Reported by kylon94, code-gen tool fix by Simon Arlott.
433 PP/03 Impose security length checks on various command-line options.
434 Fixes CVE-2020-SPRSS reported by Qualys.
436 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
437 better. Reported by Qualys.
439 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
440 providing a particularly obnoxious sender full name.
443 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
445 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
448 PP/08 Change default for recipients_max from unlimited to 50,000.
450 PP/09 Fix security issue with too many recipients on a message (to remove a
451 known security problem if someone does set recipients_max to unlimited,
452 or if local additions add to the recipient list).
453 Fixes CVE-2020-RCPTL reported by Qualys.
455 PP/10 Fix security issue in SMTP verb option parsing
456 Fixes CVE-2020-EXOPT reported by Qualys.
458 PP/11 Fix security issue in BDAT state confusion.
459 Ensure we reset known-good where we know we need to not be reading BDAT
460 data, as a general case fix, and move the places where we switch to BDAT
461 mode until after various protocol state checks.
462 Fixes CVE-2020-BDATA reported by Qualys.
464 HS/03 Die on "/../" in msglog file names
466 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
467 the Exim runtime user are allowed to create files.
469 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
472 QS/03 When reading the output from interpreted forward files we do not
473 pass the pipe between the parent and the interpreting process to
474 executed child processes (if any).
476 QS/04 Always die if requested from internal logging, even is logging is
479 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
480 the API; compilation noo longer completes with DMARC support included.
481 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
482 been reported on other platforms.
484 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
486 JH/56 Make the majority of info read from config files readonly, for defence-in-
487 depth against exploits. Suggestion by Qualys.
488 Not supported on Solaris 10.
490 JH/57 Fix control=fakreject for a custom message containing tainted data.
491 Previously this resulted in a log complaint, due to a re-expansion present
492 since fakereject was originally introduced.
494 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
495 modifier was given, a loop resulted.
497 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
498 pipelined SMTP command followed the BDAT LAST then it would be
499 incorrectly treated as part of the message body, causing a verification
502 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
503 require looser validation rules than those for 821-level addresses,
504 which only permit IP addresses.
510 JH/01 Avoid costly startup code when not strictly needed. This reduces time
511 for some exim process initialisations. It does mean that the logging
512 of TLS configuration problems is only done for the daemon startup.
514 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
516 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
517 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
520 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
521 DKIM signing is being done. Previously a transport_filter would always
522 disable CHUNKING, falling back to traditional DATA.
524 JH/05 Regard command-line recipients as tainted.
526 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
528 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
529 PAM library frees one of the arguments given to it, despite the
530 documentation. Therefore a plain malloc must be used.
532 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
533 on-stack buffers were used, resulting in a taint trap when DSN information
534 copied from a received message was written into the buffer.
536 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
537 the ordering of its ARC headers. This caused a crash.
539 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
540 a new record was being constructed with information from the peer, a trap
543 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
544 installation would get error messages from DMARC verify, when it hit the
545 nonexistent file indicated by the default. Distros wanting DMARC enabled
546 should both provide the file and set the option.
547 Also enforce no DMARC verification for command-line sourced messages.
549 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
550 could, depending on the platform, hang at the STARTTLS response.
552 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
553 message on a connection. Previously if one message had ARC headers and
554 the following one did not, a crash could result when adding an
555 Authentication-Results: header.
557 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
558 Exim main code and Exim-related utities. The introduction of taint
559 tracking also did many adjustments to string handling. Since then, eximon
560 frequently terminated with an assert failure.
562 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
563 check for 452 responses. This slightly helps the inefficieny of doing
564 a large alias-expansion into a recipient-limited target. The max_rcpt
565 transport option still applies (and at the current default, will override
566 the new feature). The check is done for either cause of synch, and forces
567 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
568 connection. The new facility is not tunable at this time.
570 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
571 library live data was being used, so the results became garbage. Make
572 copies while it is still usable.
574 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
575 on delivery deferred (==) and failed (**) lines (if a delivery was
576 attemtped). Previously it was only on completion (=>) lines.
578 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
579 for the expansion of the server_scram_iter and server_scram_salt options.
581 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
582 are now specifically given a NO_DATA response without hitting the system
583 resolver. The library goes on to do the now-standard TXT lookup.
584 Use of dnsdb lookups is not affected.
586 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
587 only retrieve the errormessage once. Previously two calls to dlerror()
588 were used, and the second one (for mainlog/paniclog) retrieved null
591 JH/20 Taint checking: disallow use of tainted data for
592 - the appendfile transport file and directory options
593 - the pipe transport command
594 - the autoreply transport file, log and once options
595 - file names used by the redirect router (including filter files)
597 - paths used by single-key lookups
598 Previously this was permitted.
600 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
601 adjusted the size of a major service buffer; this failed because the
602 buffer was in use at the time. Change to a compile-time increase in the
603 buffer size, when this authenticator is compiled into exim.
605 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
606 previous fast-mode was untenable in the face of glibs using mmap to
607 support larger malloc requests.
609 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
610 New values supported, if defined on system where compiled:
611 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
612 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
614 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
615 running a limited number of proceses in parallel, a benefit is gained. The
616 amount varies with the platform hardware and load. The use of the option
617 queue_run_in_order means we cannot do this, as ordering becomes
620 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
621 had introduced a string-copy (for ensuring NUL-termination) which was not
622 appropriate for that case, which can include embedded NUL bytes in the
623 block of data. Investigation showed the copy to actually be needless, the
624 data being length-specified.
626 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
627 done during a receiving connection, and both used TLS, global info was
628 used rather than per-connection info for tracking the state of data
629 queued for transmission. This could result in a connection hang.
631 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
632 Previously, when delivering serveral messages down a single connection
633 only the first would provide a SIZE. This was due to the size information
634 not being properly tracked.
636 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
637 TAI (at 37 seconds currently), pretend to be in UTC for time-related
638 expansion and logging. Previously, spurious values such as a future
639 minute could be seen.
641 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
642 it could crash from a null-deref. This could also affect the
643 ${addresses: } operator and ${readsock } item.
645 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
646 message following a mime one, the variable was not reset.
648 JH/30 When an pipelined-connect fails at the first response, assume incorrect
649 cached capability (perhaps the peer reneged?) and immediately retry in
652 JH/31 Fix spurious detection of timeout while writing to transport filter.
654 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
655 an attempt to copy the string was made before checking it.
657 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
658 taint of the lookup key was maintained; we now regard the presence in the
659 filesystem as sufficient validation.
661 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
662 argument is supplied.
664 JH/35 The dsearch lookup now requires that the directory is an absolute path.
665 Previously this was not checked, and nonempty relative paths made an
666 access under Exim's current working directory.
668 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
669 Previously no event was raised.
671 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
672 parameter supplied by the sender MAIL FROM command. Previously it was
673 ignored, and only the check_spool_space option value for the required
676 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
677 the size of the signing public-key. Previously it was instead giving
678 the size of the signature hash.
680 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
681 the default. See the (new) dkim_verify_min_keysizes option.
683 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
684 and an ACL use a lookup for checking either the local_part or domain,
685 stale data could be accessed. Ensure that variable references are
686 dropped between messages.
688 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
689 by the client was not checked as pointing within response data before
690 being used. A malicious client could thus cause an out-of-bounds read and
691 possibly gain authentication. Fix by adding the check.
693 JH/42 Internationalisation: change the default for downconversion in the smtp
694 transport to be "if needed". Previously it was "as previously set" for
695 the message, which usually meant "if needed" for message-submission but
696 "no" for everything else. However, MTAs have been seen using SMTPUTF8
697 even when the envelope addresses did not need it, resulting in forwarding
698 failures to non-supporting MTAs. A downconvert in such cases will be
699 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
700 transport. The change does mean that addresses needing conversion will
701 be converted when previously a delivery failure would occur.
703 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
704 response was received it would be used unchecked in a fail-DSN, violating
705 standards on line-length limits. Truncate if needed.
707 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
708 doesn't work. (Additionally add a new main config option to configure the
715 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
716 side, to decode a TLS 1.3 packet capture.
718 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
719 Previously the default library behaviour applied, sending two, each in
722 JH/03 Debug output for ACL now gives the config file name and line number for
725 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
727 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
729 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
730 buffer overrun for (non-chunking) other transports.
732 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
733 TLS1.3, means that a server rejecting a client certificate is not visible
734 to the client until the first read of encrypted data (typically the
735 response to EHLO). Add detection for that case and treat it as a failed
736 TLS connection attempt, so that the normal retry-in-clear can work (if
737 suitably configured).
739 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
740 and/or domain. Found and fixed by Jason Betts.
742 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
743 configuration). If a CNAME target was not a wellformed name pattern, a
746 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
747 the OS reports them interleaved with other addresses.
749 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
750 used both for input and for a verify callout, both encrypted, SMTP
751 responses being sent by the server could be lost. This resulted in
752 dropped connections and sometimes bounces generated by a peer sending
755 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
756 string. Previously it was possible to cause undefined behaviour in a
757 library routine (usually a crash). Found by "zerons".
759 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
762 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
763 API was removed, so update to use the newer ones.
765 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
766 any timeout set, is taking a long time. Previously we would hang on to a
767 rotated logfile "forever" if the input was arriving with long gaps
768 (a previous attempt to fix addressed lack, for a long time, of initial
771 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
772 shared (NFS) environment. The length of the tempfile name is now
773 4 + 16 ("hdr.$message_exim_id") which might break on file
774 systems which restrict the file name length to lower values.
777 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
778 shared (NFS) environment.
780 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
781 did for all versions <4.90). Notably -M, -m, --invert, -I may be
784 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
785 on some platforms for bit 31.
787 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
788 to changes apparently associated with TLS1.3 handling some of the APIs
789 previously used were either nonfunctional or inappropriate. Strings
790 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
791 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
792 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
793 This affects log line X= elements, the $tls_{in,out}_cipher variables,
794 and the use of specific cipher names in the encrypted= ACL condition.
796 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
798 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
799 verification result was not updated unless hosts_require_ocsp applied.
801 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
802 queue_list_requires_admin set to false, non-admin users were denied the
805 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
806 directory-of-certs mode. Previously they were advertised despite the
809 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
810 A single TCP connection by a client will now hold a TLS connection open
811 for multiple message deliveries, by default. Previously the default was to
814 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
815 default. If built with the facility, DANE will be used. The facility
816 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
818 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
819 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
820 must be defined and you must still, unless you define DISABLE_TLS, manage
821 the the include-dir and library-file requirements that go with that
822 choice. Non-TLS builds are still supported.
824 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
827 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
828 default. If the platform supports and has the facility enabled, it will
829 be requested on all coneections.
831 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
832 controlled by the build-time option SUPPORT_PIPE_CONNECT.
834 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
836 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
837 success-DSN messages. Previously the From: header was always the default
838 one for these; the option was ignored.
840 JH/28 Fix the timeout on smtp response to apply to the whole response.
841 Previously it was reset for every read, so a teergrubing peer sending
842 single bytes within the time limit could extend the connection for a
843 long time. Credit to Qualsys Security Advisory Team for the discovery.
845 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
846 delivery address, which leaked information of the results of local
847 forwarding. Change to the original envelope recipient address, per
850 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
851 requested. Previously not bounce was generated and a log entry of
852 error ignored was made.
854 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
856 JH/32 Introduce a general tainting mechanism for values read from the input
857 channel, and values derived from them. Refuse to expand any tainted
858 values, to catch one form of exploit.
860 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
861 was unused and the unexpanded text used for the test. Found and
862 fixed by Ruben Jenster.
864 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
865 an attempt to use a TLS library read routine dereffed a nul pointer,
868 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
869 them in our smtp response.
871 JH/36 Have the general router option retry_use_local_part default to true when
872 any of the restrictive preconditions are set (to anything). Previously it
873 was only for check_local user. The change removes one item of manual
874 configuration which is required for proper retries when a remote router
875 handles a subset of addresses for a domain.
877 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
878 link count into consideration.
880 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
881 caused the extension of big_buffer, the following lines were ignored.
883 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
884 accordance with RFC 2308. Previously there was no expiry, so a longlived
885 receive process (eg. due to ACL delays) versus a short SOA value could
888 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
890 JH/39 Promote DMARC support to mainline.
892 JH/40 Bug 2452: Add a References: header to DSNs.
894 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
895 parameters. The relevant library call is documented as "Deprecated: This
896 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
897 3.6.0, DH parameters are negotiated following RFC7919."
899 HS/06 Change the default of dnssec_request_domains to "*"
901 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
902 carried on and emitted a BDAT command, even when PIPELINING was not
905 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
906 buffer was used for the filename, resulting in a trap when tainted
907 arguments (eg. $domain) were used.
909 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
910 recommended to avoid a possible server-load attack. The feature can be
911 re-enabled via the openssl_options main cofiguration option.
913 JH/45 local_scan API: documented the current smtp_printf() call. This changed
914 for version 4.90 - adding a "more data" boolean to the arguments.
915 Bumped the ABI version number also, this having been missed previously;
916 release versions 4.90 to 4.92.3 inclusive were effectively broken in
917 respect of usage of smtp_printf() by either local_scan code or libraries
918 accessed via the ${dlfunc } expansion item. Both will need coding
919 adjustment for any calls to smtp_printf() to match the new function
920 signature; a FALSE value for the new argument is always safe.
922 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
923 the file-offset (which the Linux syscall does, and exim expects); this
924 resulted in an indefinite loop.
926 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
927 to do ARC verification. The Authentication-Results: header line added
928 by the configuration then had no ARC item.
930 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
931 an incorrect mode was used for reading the result, resulting in it being
938 JH/01 Remove code calling the customisable local_scan function, unless a new
939 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
941 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
942 non-signal-safe functions being used.
944 JH/03 Bug 2269: When presented with a received message having a stupidly large
945 number of DKIM-Signature headers, disable DKIM verification to avoid
946 a resource-consumption attack. The limit is set at twenty.
948 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
949 report of oldest_pass in ${authres } in consequence, and separate out
950 some descriptions of reasons for verification fail.
952 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
953 files in the spool were present and unlocked. A queue-runner could spot
954 them, resulting in a duplicate delivery. Fix that by doing the unlock
955 after the unlink. Investigation by Tim Stewart. Take the opportunity to
956 add more error-checking on spoolfile handling while that code is being
959 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
960 No known attacks, no CVE, this is defensive hardening.
962 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
963 a queue-runner could start a delivery while other operations were ongoing.
964 Cutthrough delivery was a common victim, resulting in duplicate delivery.
965 Found and investigated by Tim Stewart. Fix by using the open message data
966 file handle rather than opening another, and not locally closing it (which
967 releases a lock) for that case, while creating the temporary .eml format
968 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
970 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
971 $sender_verify_failure/$recipient_verify_failure to "random".
973 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
976 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
977 Previously this would segfault.
979 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
982 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
983 like zero, since the resolver should be doing this for us, But we need one
984 as a CNAME but no MX presence gets the CNAME returned; we need to check
985 that doesn't point to an MX to declare it "no MX returned" rather than
986 "error, loop". A new main option is added so the older capability of
987 following some limited number of chain links is maintained.
989 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
991 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
992 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
993 now-deprecated earlier definitions used only specified the range up to TLS
994 1.2 (in the older-version library docs).
996 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
998 JH/15 Rework TLS client-side context management. Stop using a global, and
999 explicitly pass a context around. This enables future use of TLS for
1000 connections to service-daemons (eg. malware scanning) while a client smtp
1001 connection is using TLS; with cutthrough connections this is quite likely.
1003 JH/16 Fix ARC verification to do AS checks in reverse order.
1005 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1007 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1008 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1009 Previously the "utf8" would be re-prepended for every additional message.
1011 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1012 Previously thery were accepted, resulting in issues when attempting to
1013 forward messages to a non-supporting MTA.
1015 PP/02 Let -n work with printing macros too, not just options.
1017 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1018 one parent address was copied, and bogus data was used at delivery-logging
1019 time. Either a crash (after delivery) or bogus log data could result.
1020 Discovery and analysis by Tim Stewart.
1022 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1023 Previously if the string ended mid-character, we did not insert the
1024 promised '?' replacement.
1026 PP/04 Documentation: current string operators work on bytes, not codepoints.
1028 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1029 should pack well giving a smaller memory footprint so better caching and
1030 therefore performance. Group the declarations where this can't be done so
1031 that the byte-sized flag variables are not interspersed among pointer
1032 variables, giving a better chance of good packing by the compiler.
1034 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1035 non-null, to avoid issues with sites running BATV. Previously reports were
1036 sent with an empty envelope sender so looked like bounces.
1038 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1039 The ignore_error flag wasn't being returned from the filter subprocess so
1040 was not set for later routers. Investigation and fix by Matthias Kurz.
1042 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1043 and a msg:complete for the whole, when a message is manually removed using
1044 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1046 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1047 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1048 hope that is portable enough.
1050 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1051 requiring a known-CA anchor certificate; make it now rely entirely on the
1052 TLSA as an anchor. Checking the name on the leaf cert against the name
1053 on the A-record for the host is still done for TA (but not for EE mode).
1055 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1056 included in delivery lines for non-proxied connections, when compiled with
1057 SUPPORT_SOCKS and running with proxy logging enabled.
1059 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1060 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1061 move the existing event to fire before the normal logging of message
1062 failure so that custom logging is bracketed by normal logging.
1064 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1065 msg:fail:internal event. Developement by Matthias Kurz.
1067 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1068 far too small for todays use of crypto signatures stored there. Go all
1069 the way to the max DNS message size of 64kB, even though this might be
1070 overmuch for IOT constrained device use.
1072 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1073 copy a string over itself. The library routine is documented as not
1074 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1076 JH/32 For main options check_spool_space and check_inode_space, where the
1077 platform supports 64b integers, support more than the previous 2^31 kB
1078 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1079 the previous G, M, k.
1081 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1082 $authenticated_fail_id variable on authentication failure. Previously
1085 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1086 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1087 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1088 GNUTLS_SEC_PARAM_MEDIUM.
1090 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1091 side. Previously we would continue as if no SNI had been received.
1093 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1094 "<" character, which should be a list-separator specification, we walked
1095 off past the nul-terimation.
1097 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1098 causes) even when the retry time is not yet met. Previously they were
1099 not, meaning that when (say) an account was over-quota and temp-rejecting,
1100 and multiple senders' messages were queued, only one sender would get
1101 notified on each configured delay_warning cycle.
1103 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1105 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1106 cipher-suites, an error can be left on the stack even for a succeeding
1107 accept; this results in impossible error messages when a later operation
1110 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1111 return error codes indicating retry. Under TLS1.3 this becomes required.
1113 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1114 it only wrote the new authenticators, resulting in a lack of tracking of
1115 peer changes of ESMTP extensions until the next cache flush.
1117 JH/41 Fix the loop reading a message header line to check for integer overflow,
1118 and more-often against header_maxsize. Previously a crafted message could
1119 induce a crash of the recive process; now the message is cleanly rejected.
1121 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1122 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1128 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1129 When redis_servers is set to a list of > 1 element, and the Redis servers
1130 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1131 case of MOVED into a DEFER case instead, thus moving the query onto the
1132 next server in the list. For a cluster of N elements, all N servers must
1133 be defined in redis_servers.
1135 GF/02 Catch and remove uninitialized value warning in exiqsumm
1136 Check for existence of @ARGV before looking at $ARGV[0]
1138 JH/01 Replace the store_release() internal interface with store_newblock(),
1139 which internalises the check required to safely use the old one, plus
1140 the allocate and data copy operations duplicated in both (!) of the
1141 extant use locations.
1143 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1144 modifier. This matches the restriction on the commandline.
1146 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1147 Previously only the last row was returned.
1149 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1150 we assumed that tags in the header were well-formed, and parsed the
1151 element content after inspecting only the first char of the tag.
1152 Assumptions at that stage could crash the receive process on malformed
1155 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1156 While running the DKIM ACL we operate on the Permanent memory pool so that
1157 variables created with "set" persist to the DATA ACL. Also (at any time)
1158 DNS lookups that fail create cache records using the Permanent pool. But
1159 expansions release any allocations made on the current pool - so a dnsdb
1160 lookup expansion done in the DKIM ACL releases the memory used for the
1161 DNS negative-cache, and bad things result. Solution is to switch to the
1162 Main pool for expansions.
1163 While we're in that code, add checks on the DNS cache during store_reset,
1164 active in the testsuite.
1165 Problem spotted, and debugging aided, by Wolfgang Breyha.
1167 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1168 When none of the hosts presented to a transport match an already-open
1169 connection, close it and proceed with the list. Previously we would
1170 queue the message. Spotted by Lena with Yahoo, probably involving
1173 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1174 Previously a spurious "250 OK id=" response was appended to the proper
1177 JH/08 The "support for" informational output now, which built with Content
1178 Scanning support, has a line for the malware scanner interfaces compiled
1179 in. Interface can be individually included or not at build time.
1181 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1182 by the template makefile "src/EDITME". The "STREAM" support for an older
1183 ClamAV interface method is removed.
1185 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1186 rows affected is given instead).
1188 JH/11 The runtime Berkeley DB library version is now additionally output by
1189 "exim -d -bV". Previously only the compile-time version was shown.
1191 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1192 SMTP connection. Previously, when one had more recipients than the
1193 first, an abortive onward connection was made. Move to full support for
1194 multiple onward connections in sequence, handling cutthrough connection
1195 for all multi-message initiating connections.
1197 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1198 routers. Previously, a multi-recipient message would fail to match the
1199 onward-connection opened for the first recipient, and cause its closure.
1201 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1202 a timeout on read on a GnuTLS initiating connection, resulting in the
1203 initiating connection being dropped. This mattered most when the callout
1204 was marked defer_ok. Fix to keep the two timeout-detection methods
1207 JH/15 Relax results from ACL control request to enable cutthrough, in
1208 unsupported situations, from error to silently (except under debug)
1209 ignoring. This covers use with PRDR, frozen messages, queue-only and
1212 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1214 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1215 metadata, resulting in a crash in free().
1217 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1218 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1219 Broken also in d185889f4, with init system revamp.
1221 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1222 Previously we abruptly closed the connection after reading a malware-
1223 found indication; now we go on to read the "scan ok" response line,
1226 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1227 ACL. Previously, a crash would result.
1229 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1230 macro text after a replacement (previously it was only once per line) and
1231 by skipping builtin macros when searching for an uppercase lead character.
1233 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1234 for the build is renamed.
1236 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1237 was allocated for every new TLS startup, meaning one per message. Fix
1238 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1240 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1241 reported the original. Fix to report (as far as possible) the ACL
1242 result replacing the original.
1244 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1245 OpenSSL. Certificate information is loaded for every new TLS startup,
1246 and the resources needed to be freed.
1248 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1250 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1253 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1254 DATA response info to the (existing) per-recipient response info for
1255 the "C=" log element. It can have useful tracking info from the
1256 destination system. Patch from Simon Arlott.
1258 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1259 length value. Previously this would segfault.
1261 HS/02 Support Avast multiline protoocol, this allows passing flags to
1262 newer versions of the scanner.
1264 JH/28 Ensure that variables possibly set during message acceptance are marked
1265 dead before release of memory in the daemon loop. This stops complaints
1266 about them when the debug_store option is enabled. Discovered specifically
1267 for sender_rate_period, but applies to a whole set of variables.
1268 Do the same for the queue-runner and queue-list loops, for variables set
1269 from spool message files. Do the same for the SMTP per-message loop, for
1270 certain variables indirectly set in ACL operations.
1272 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1273 as a multi-recipient message from a mailinglist manager). The coding had
1274 an arbitrary cutoff number of characters while checking for more input;
1275 enforced by writing a NUL into the buffer. This corrupted long / fast
1276 input. The problem was exposed more widely when more pipelineing of SMTP
1277 responses was introduced, and one Exim system was feeding another.
1278 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1279 receiving system, and refused recipients seen by the sending system
1280 (propating to people being dropped from mailing lists).
1281 Discovered and pinpointed by David Carter.
1283 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1284 replaced by the ${authresults } expansion.
1286 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1288 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1289 allows proper process termination in container environments.
1291 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1292 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1294 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1295 and "err_perm", deprecated since 4.83 when the RFC-defined words
1296 "temperror" and "permerror" were introduced.
1298 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1299 transport-filters or DKIM-signing. The restriction was lost in the
1300 consolidation of verify-callout and delivery SMTP handling.
1301 Extend the restriction to also cover ARC-signing.
1303 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1304 in defer=pass mode supply a 450 to the initiator. Previously the message
1307 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1308 tls_require_ciphers is used as before.
1310 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1311 "pass_unscanned". Only tmpfails from the scanner are written to
1312 the paniclog, as they may require admin intervention (permission
1313 denied, license issues). Other scanner errors (like decompression
1314 bombs) do not cause a paniclog entry.
1316 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1317 Previously it was possible to log spurious information in receive log
1320 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1321 triggered odd behaviour from Outlook Express clients.
1323 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1326 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1327 since the IETF WG has not yet settled on that versus the original
1328 "bare" representation.
1330 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1331 Previously the millisecond value corrupted the output.
1332 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1333 corrupted the output.
1339 JH/01 Rework error string handling in TLS interface so that the caller in
1340 more cases is responsible for logging. This permits library-sourced
1341 string to be attached to addresses during delivery, and collapses
1342 pairs of long lines into single ones.
1344 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1345 during configuration. Wildcards are allowed and expanded.
1347 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1348 This permits better logging.
1350 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1351 do not close it down and have the child transport start it up again on
1352 the passed-on TCP connection. Instead, proxy the child (and any
1353 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1354 affected: the continued delivery log lines do not have any DNSSEC, TLS
1355 Certificate or OCSP information. TLS cipher information is still logged.
1357 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1358 identical IP addresses on different listening ports. Will also affect
1361 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1362 add noisy ifdef guards to special-case this sillyness.
1363 Patch from Bernd Kuhls.
1365 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1366 than 255 are no longer allowed.
1368 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1369 Disable the session-cache too, which might reduce our load. Since we
1370 currrectly use a new context for every connection, both as server and
1371 client, there is no benefit for these.
1372 GnuTLS appears to not support tickets server-side by default (we don't
1373 call gnutls_session_ticket_enable_server()) but client side is enabled
1374 by default on recent versions (3.1.3 +) unless the PFS priority string
1377 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1378 <https://reproducible-builds.org/specs/source-date-epoch/>.
1380 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1381 the check for any unsuccessful recipients did not notice the limit, and
1382 erroneously found still-pending ones.
1384 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1385 MSG_MORE. Only in-clear (not on TLS connections).
1387 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1388 transport-filter is involved we can buffer the headers in memory for
1389 creating the signature, and read the spool data file once for the
1390 signature and again for transmission.
1392 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1393 4.77 as the kernel support then wasn't solid, having issues in 64bit
1394 mode. Now, it's been long enough. Add support for FreeBSD also.
1396 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1397 case where the routing stage had gathered several addresses to send to
1398 a host before calling the transport for the first, we previously failed
1399 to close down TLS in the old transport process before passing the TCP
1400 connection to the new process. The new one sent a STARTTLS command
1401 which naturally failed, giving a failed delivery and bloating the retry
1402 database. Investigation and fix prototype from Wolfgang Breyha.
1404 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1405 false-negatives in the check that the sender had not preempted a response
1406 or prompt from Exim (running as a server), due to that code's lack of
1407 awareness of the SMTP input buffering.
1409 PP/04 Add commandline_checks_require_admin option.
1410 Exim drops privileges sanely, various checks such as -be aren't a
1411 security problem, as long as you trust local users with access to their
1412 own account. When invoked by services which pass untrusted data to
1413 Exim, this might be an issue. Set this option in main configuration
1414 AND make fixes to the calling application, such as using `--` to stop
1417 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1418 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1419 responses to those, into a single TLS record each way (this usually means
1420 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1423 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1424 affects you only if you're dancing at the edge of the param size limits.
1425 If you are, and this message makes sense to you, then: raise the
1426 configured limit or use OpenSSL 1.1. Nothing we can do for older
1429 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1430 cmdline element to get the documented default one. Previously it was
1433 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1434 are unsuable for non-message-specific reasons - eg. connection timeout,
1435 banner-time rejection.
1437 JH/16 Fix logging of delivery remote port, when specified by router, under
1440 PP/06 Repair manualroute's ability to take options in any order, even if one
1441 is the name of a transport.
1444 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1446 JH/17 Change the list-building routines interface to use the expanding-string
1447 triplet model, for better allocation and copying behaviour.
1449 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1450 Previously it was constructed the first time a possibly-matching string
1451 was met in the configuration file input during startup; now it is done
1454 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1455 compatible one, to avoid the (poorly documented) possibility of a config
1456 file in the working directory redirecting the DB files, possibly correpting
1457 some existing file. CVE-2017-10140 assigned for BDB.
1459 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1460 cache-hot. Previously, although the result was properly cached, the
1461 initial verify call returned a defer.
1463 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1464 the main verify for receipient in uncached-mode.
1466 JH/22 Retire historical build files to an "unsupported" subdir. These are
1467 defined as "ones for which we have no current evidence of testing".
1469 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1470 if present. Previously it was ignored.
1472 JH/24 Start using specified-initialisers in C structure init coding. This is
1473 a C99 feature (it's 2017, so now considered safe).
1475 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1476 if was a fixed-sized field and bitmask ops via macros; it is now more
1479 PP/07 GitHub PR 56: Apply MariaDB build fix.
1480 Patch provided by Jaroslav Škarvada.
1482 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1483 during Coverity cleanups [4.87 JH/47]
1484 Diagnosis and fix provided by Michael Fischer v. Mollard.
1486 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1487 the right size to place the terminating semicolon on its own folded
1488 line, the header hash was calculated to an incorrect value thanks to
1489 the (relaxed) space the fold became.
1491 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1492 and confused the parent.
1494 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1495 which could crash as a result. This could lead to undeliverable messages.
1497 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1500 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1501 matters on fast-turnover and PID-randomising systems, which were getting
1502 out-of-order delivery.
1504 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1505 a possibly-overlapping copy. The symptom was that "Remote host closed
1506 connection in response to HELO" was logged instead of the actual 4xx
1509 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1510 Previously only that bufferd was discarded, resulting in SYMTP command
1513 JH/32 DKIM: when a message has multiple signatures matching an identity given
1514 in dkim_verify_signers, run the dkim acl once for each. Previously only
1515 one run was done. Bug 2189.
1517 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1518 "panic the current process" to "deliberately defer". The panic log is
1519 still written with the problem list name; the mail and reject logs now
1520 get a temp-reject line for the message that was being handled, saying
1521 something like "domains check lookup or other defer". The SMTP 451
1522 message is still "Temporary local problem".
1524 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1525 A crafted sequence of BDAT commands could result in in-use memory beeing
1526 freed. CVE-2017-16943.
1528 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1529 from SMTP input. Previously it was always done; now only done for DATA
1530 and not BDAT commands. CVE-2017-16944.
1532 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1533 to the message (such as an overlong header line). Previously this was
1534 not done and we did not exit BDAT mode. Followon from the previous item
1535 though a different problem.
1541 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1542 than -2003 did; needs libidn2 in addition to libidn.
1544 JH/02 The path option on a pipe transport is now expanded before use.
1546 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1547 Patch provided by "Björn", documentation fix added too.
1549 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1550 missing a wire-to-host endian conversion.
1552 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1553 close after a BDAT command line could be taken as a following command,
1554 giving a synch failure. Fix by only checking for synch immediately
1555 before acknowledging the chunk.
1557 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1558 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1559 macro. Patches provided by Josh Soref.
1561 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1562 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1563 by IANA as a service extension. However, John Klensin suggests that we
1566 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1567 the dkim code may be unix-mode line endings rather than smtp wire-format
1568 CRLF, so prepend a CR to any bare LF.
1570 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1571 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1573 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1574 the first were themselves being wrongly included in the feed into dkim
1575 processing; with most chunk sizes in use this resulted in an incorrect
1576 body hash calculated value.
1578 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1579 DKIM signature block, for verification. Although advised against by
1580 standards it is specifically not ruled illegal.
1582 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1584 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1585 missing a body hash (the bh= tag).
1587 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1588 It seems that HAProxy sends the Proxy Protocol information in clear and
1589 only then does a TLS startup, so do the same.
1591 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1592 TCP connections (such as for Spamd) unless the daemon successfully set
1593 Fast Open mode on its listening sockets. This fixes breakage seen on
1594 too-old kernels or those not configured for Fast Open, at the cost of
1595 requiring both directions being enabled for TFO, and TFO never being used
1596 by non-daemon-related Exim processes.
1598 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1599 endings, at least on the first header line. Try to canonify any that get
1600 past that check, despite the cost.
1602 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1603 now limited to an arbitrary five deep, while parsing addresses with the
1604 strip_excess_angle_brackets option enabled.
1606 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1607 instead leave the unprompted TLS handshake in socket buffer for the
1608 TLS library to consume.
1610 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1612 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1614 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1615 region in one operation, for speed, and this leaves assigned pointers
1616 dangling. Add checks run only under the testsuite which checks all
1617 variables at a store-reset and panics on a dangling pointer; add code
1618 explicitly nulling out all the variables discovered. Fixes one known
1619 bug: a transport crash, where a dangling pointer for $sending_ip_address
1620 originally assigned in a verify callout, is re-used.
1622 PP/06 Drop '.' from @INC in various Perl scripts.
1624 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1626 PP/08 Reduce a number of compilation warnings under clang; building with
1627 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1628 should be warning-free.
1630 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1632 HS/01 Fix portability problems introduced by PP/08 for platforms where
1633 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1635 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1636 chunk. This allows us to accept broken chunked messages. We need a more
1637 general solution here.
1639 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1640 already-broken messages in the queue.
1642 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1644 JH/19 Fix reference counting bug in routing-generated-address tracking.
1650 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1651 supports it and a size is available (ie. the sending peer gave us one).
1653 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1654 years of being deprecated). The replacements are the ACLs
1655 acl_smtp_mime and acl_not_smtp_mime.
1657 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1658 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1659 or even an in-clear connection were permitted. Now, if the host lookup
1660 was dnssec and dane was requested then the host is only used if the
1661 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1662 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1663 if one fails this test.
1664 This means that a poorly-configured remote DNS will make it incommunicado;
1665 but it protects against a DNS-interception attack on it.
1667 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1668 non-noisy when a race steals the message being considered.
1670 JH/05 If main configuration option tls_certificate is unset, generate a
1671 self-signed certificate for inbound TLS connections.
1673 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1674 in rewrites and routers.
1676 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1677 and logged a warning sing 4.83; now they are a configuration file error.
1679 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1680 (lacking @domain). Apply the same qualification processing as RCPT.
1682 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1684 JH/10 Support ${sha256:} applied to a string (as well as the previous
1687 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1688 a cutthrough deliver is pending, as we always want to make a connection.
1689 This also avoids re-routing the message when later placing the cutthrough
1690 connection after a verify cache hit.
1691 Do not update it with the verify result either.
1693 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1694 when routing results in more than one destination address.
1696 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1697 signing (which inhibits the cutthrough capability). Previously only
1698 the presence of an option was tested; now an expansion evaluating as
1699 empty is permissible (obviously it should depend only on data available
1700 when the cutthrough connection is made).
1702 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1703 the relevant preceding SMTP command did not note the pipelining mode.
1705 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1706 Previously they were not counted.
1708 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1709 as one having no matching records. Previously we deferred the message
1710 that needed the lookup.
1712 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1713 distinguished as "(=".
1715 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1716 for missing MX records. Previously it only worked for missing A records.
1718 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1720 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1721 after the data-go-ahead and data-ack. Patch from Jason Betts.
1723 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1724 even for a "none" policy. Patch from Tony Meyer.
1726 JH/22 Fix continued use of a connection for further deliveries. If a port was
1727 specified by a router, it must also match for the delivery to be
1730 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1731 When one of the recipients of a message was unsuitable for the connection
1732 (has no matching addresses), we lost track of needing to mark it
1733 deferred. As a result mail would be lost.
1735 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1737 JH/25 Decoding ACL controls is now done using a binary search; the source code
1738 takes up less space and should be simpler to maintain. Merge the ACL
1739 condition decode tables also, with similar effect.
1741 JH/26 Fix problem with one_time used on a redirect router which returned the
1742 parent address unchanged. A retry would see the parent address marked as
1743 delivered, so not attempt the (identical) child. As a result mail would
1746 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1747 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1748 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1751 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1752 Main config options check_{log,spool}_{inodes,space} are now
1753 100 inodes, 10MB unless set otherwise in the configuration.
1755 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1756 Previously it only applied to the main-section connection policy
1759 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1761 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1762 by me. Added RFC7919 DH primes as an alternative.
1764 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1765 are not in the system include path.
1767 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1768 GnuTLS, when a session startup failed (eg because the client disconnected)
1769 Exim did stdio operations after fclose. This was exposed by a recent
1770 change which nulled out the file handle after the fclose.
1772 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1773 signed directly by the cert-signing cert, rather than an intermediate
1774 OCSP-signing cert. This is the model used by LetsEncrypt.
1776 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1778 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1779 an incoming connection.
1781 HS/02 Bug 1802: Do not half-close the connection after sending a request
1784 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1785 fallback to "prime256v1".
1787 JH/34 SECURITY: Use proper copy of DATA command in error message.
1788 Could leak key material. Remotely exploitable. CVE-2016-9963.
1794 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1795 and 3.4.4 - once the server is enabled to respond to an OCSP request
1796 it does even when not requested, resulting in a stapling non-aware
1797 client dropping the TLS connection.
1799 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1800 support variable-length bit vectors. No functional change.
1802 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1803 The I= interface field on outgoing lines is now after the H= remote
1804 host field, same as incoming lines. There is a separate
1805 outgoing_interface log selector which allows you to disable the
1808 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1809 If not running log_selector +smtp_connection the mainlog would be held
1810 open indefinitely after a "too many connections" event, including to a
1811 deleted file after a log rotate. Leave the per net connection logging
1812 leaving it open for efficiency as that will be quickly detected by the
1813 check on the next write.
1815 HS/01 Bug 1671: Fix post transport crash.
1816 Processing the wait-<transport> messages could crash the delivery
1817 process if the message IDs didn't exist for some reason. When
1818 using 'split_spool_directory=yes' the construction of the spool
1819 file name failed already, exposing the same netto behaviour.
1821 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1822 mime_regex ACL conditions.
1824 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1825 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1826 to HELO, local diagnostic string.
1828 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1829 log line to debug. Even when configured with a tls authenticator many
1830 client connections are expected to not authenticate in this way, so
1831 an authenticate fail is not an error.
1833 HS/02 Add the Exim version string to the process info. This way exiwhat
1834 gives some more detail about the running daemon.
1836 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1837 matter for fast-change records such as DNSBLs.
1839 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1840 retry record, even if constant. There may be multiple transports with
1841 different interface settings and the retry behaviour needs to be kept
1844 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1846 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1848 JH/10 Bug 840: fix log_defer_output option of pipe transport
1850 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1851 hosts_randomize. This matters a lot when combined with mua_wrapper.
1853 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1854 ${quote_pgsql:<string>} operator.
1856 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1858 JH/14 Change header file name for freeradius-client. Relevant if compiling
1859 with Radius support; from the Gentoo tree and checked under Fedora.
1861 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1863 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1864 option transport_filter, meaning no filtering.
1866 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1868 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1869 defaults to "*" (all hosts). The variable is now available when not built
1870 with TLS, default unset, mainly to enable keeping the testsuite sane.
1871 If a server certificate is not supplied (via tls_certificate) an error is
1872 logged, and clients will find TLS connections fail on startup. Presumably
1873 they will retry in-clear.
1874 Packagers of Exim are strongly encouraged to create a server certificate
1875 at installation time.
1877 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1878 with the $config_file variable.
1880 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1881 in transport context, after the attempt, and per-recipient. The latter type
1882 is per host attempted. The event data is the error message, and the errno
1883 information encodes the lookup type (A vs. MX) used for the (first) host,
1884 and the trailing two digits of the smtp 4xx response.
1886 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1887 to write to mainlog (or rejectlog, paniclog) in the window between file
1888 creation and permissions/ownership being changed. Particularly affects
1889 installations where exicyclog is run as root, rather than exim user;
1890 result is that the running daemon panics and dies.
1892 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1894 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1895 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1896 "pri" and "weight". Note that the previous implicit priority given by the
1897 list order is no longer honoured.
1899 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1900 for DKIM processing.
1902 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1903 by defining SUPPORT_SOCKS.
1905 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1906 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1907 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1908 variables are renamed to proxy_{local,external}_{address,port}.
1910 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1911 for a build by defining SUPPORT_I18N
1913 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1914 of the query string, and make ${quote_redis:} do that quoting.
1916 JH/29 Move Events support from Experimental to mainline, enabled by default
1917 and removable for a build by defining DISABLE_EVENT.
1919 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1921 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1922 cached by the daemon.
1924 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1925 by defining LOOKUP_REDIS. The libhiredis library is required.
1927 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1928 keys are given for lookup.
1930 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1931 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1932 only supported when built with TLS support. The PolarSSL SHA routines
1933 are still used when the TLS library is too old for convenient support.
1935 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1936 openssl_options), for security. OpenSSL forces this from version 1.1.0
1937 server-side so match that on older versions.
1939 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1940 allocation for $value could be released as the expansion processing
1941 concluded, but leaving the global pointer active for it.
1943 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1944 and to use the domains and local_parts ACL conditions.
1946 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1947 incorrectly not doubled on cutthrough transmission, hence seen as a
1948 body-termination at the receiving system - resulting in truncated mails.
1949 Commonly the sender saw a TCP-level error, and retransmitted the message
1950 via the normal store-and-forward channel. This could result in duplicates
1951 received - but deduplicating mailstores were liable to retain only the
1952 initial truncated version.
1954 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1956 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1958 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1959 we're in there, support oversigning also; bug 1309.
1961 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1963 HS/04 Add support for keep_environment and add_environment options.
1965 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1966 either intentional arithmetic overflow during PRNG, or testing config-
1969 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1970 delivery resulted in actual delivery. Cancel cutthrough before DATA
1973 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1974 rejects a recipient: pass the reject to the originator.
1976 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1977 Many were false-positives and ignorable, but it's worth fixing the
1980 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1981 for the new environment-manipulation done at startup. Move the routines
1982 from being local to tls.c to being global via the os.c file.
1984 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1985 an extract embedded as result-arg for a map, the first arg for extract
1986 is unavailable so we cannot tell if this is a numbered or keyed
1987 extraction. Accept either.
1993 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1996 JH/02 The smtp transport option "multi_domain" is now expanded.
1998 JH/03 The smtp transport now requests PRDR by default, if the server offers
2001 JH/04 Certificate name checking on server certificates, when exim is a client,
2002 is now done by default. The transport option tls_verify_cert_hostnames
2003 can be used to disable this per-host. The build option
2004 EXPERIMENTAL_CERTNAMES is withdrawn.
2006 JH/05 The value of the tls_verify_certificates smtp transport and main options
2007 default to the word "system" to access the system default CA bundle.
2008 For GnuTLS, only version 3.0.20 or later.
2010 JH/06 Verification of the server certificate for a TLS connection is now tried
2011 (but not required) by default. The verification status is now logged by
2012 default, for both outbound TLS and client-certificate supplying inbound
2015 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2018 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2019 Status Notification (bounce) messages are now MIME format per RFC 3464.
2020 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2021 under the control of the dsn_advertise_hosts option, and routers may
2022 have a dsn_lasthop option.
2024 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2025 default, modifiable by a malware= option. The list separator for
2026 the options can now be changed in the usual way. Bug 68.
2028 JH/10 The smtp_receive_timeout main option is now expanded before use.
2030 JH/11 The incoming_interface log option now also enables logging of the
2031 local interface on delivery outgoing connections.
2033 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2034 if the interface and destination host and port all match.
2036 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2039 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2040 Patch from Andrew Lewis.
2042 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2043 now supports optional time-restrictions, weighting, and priority
2044 modifiers per server. Patch originally by <rommer@active.by>.
2046 JH/16 The spamd_address main option now supports a mixed list of local
2047 and remote servers. Remote servers can be IPv6 addresses, and
2048 specify a port-range.
2050 JH/17 Bug 68: The spamd_address main option now supports an optional
2051 timeout value per server.
2053 JH/18 Bug 1581: Router and transport options headers_add/remove can
2054 now have the list separator specified.
2056 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2059 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2062 JH/21 Support for the A6 type of dns record is withdrawn.
2064 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2065 rather than the verbs used.
2067 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2068 from 255 to 1024 chars.
2070 JH/24 Verification callouts now attempt to use TLS by default.
2072 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2073 are generic router options now. The defaults didn't change.
2075 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2076 Original patch from Alexander Shikoff, worked over by JH.
2078 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2079 files if ZCAT_COMMAND is not executable.
2081 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2083 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2085 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2086 Normally benign, it bites when the pair was led to by a CNAME;
2087 modern usage is to not canonicalize the domain to a CNAME target
2088 (and we were inconsistent anyway for A-only vs AAAA+A).
2090 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2092 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2093 when evaluating $sender_host_dnssec.
2095 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2096 $sender_helo_dnssec variable.
2098 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2100 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2102 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2104 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2105 documented as working, but never had. Support all but $spam_report.
2107 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2108 added for tls authenticator.
2110 HS/03 Add perl_taintmode main config option
2116 TL/01 When running the test suite, the README says that variables such as
2117 no_msglog_check are global and can be placed anywhere in a specific
2118 test's script, however it was observed that placement needed to be near
2119 the beginning for it to behave that way. Changed the runtest perl
2120 script to read through the entire script once to detect and set these
2121 variables, reset to the beginning of the script, and then run through
2122 the script parsing/test process like normal.
2124 TL/02 The BSD's have an arc4random API. One of the functions to induce
2125 adding randomness was arc4random_stir(), but it has been removed in
2126 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2127 function when detected.
2129 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2130 cause callback expansion.
2132 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2133 syntax errors in an expansion can be treated as a string instead of
2134 logging or causing an error, due to the internal use of bool_lax
2135 instead of bool when processing it.
2137 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2138 server certificates when making smtp deliveries.
2140 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2142 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2144 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2146 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2147 Merged patch from Sebastian Wiedenroth.
2149 JH/05 Fix results-pipe from transport process. Several recipients, combined
2150 with certificate use, exposed issues where response data items split
2151 over buffer boundaries were not parsed properly. This eventually
2152 resulted in duplicates being sent. This issue only became common enough
2153 to notice due to the introduction of connection certificate information,
2154 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2156 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2157 size buffer was used, resulting in syntax errors when an expansion
2160 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2161 version 3.3.6 or later.
2163 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2164 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2165 both become "event_action", the variables become $event_name, $event_data
2166 and $event_defer_errno. There is a new variable $verify_mode, usable in
2167 routers, transports and related events. The tls:cert event is now also
2168 raised for inbound connections, if the main configuration event_action
2171 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2172 early OCSP support, but no stapling (appears to be less than 1.0.0).
2174 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2175 server certificate names available under the smtp transport option
2176 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2179 JH/10 Time-related extraction expansions from certificates now use the main
2180 option "timezone" setting for output formatting, and are consistent
2181 between OpenSSL and GnuTLS compilations. Bug 1541.
2183 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2184 encoded parameter in the incoming message. Bug 1558.
2186 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2187 include certificate info, eximon was claiming there were spoolfile
2190 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2192 JH/14 Log delivery-related information more consistently, using the sequence
2193 "H=<name> [<ip>]" wherever possible.
2195 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2196 are problematic for Debian distribution, omit them from the release
2199 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2201 JH/16 Fix string representation of time values on 64bit time_t architectures.
2204 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2205 output list separator was used.
2210 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2211 checkers that were complaining about end of non-void function with no
2214 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2215 This was a regression introduced in 4.83 by another bugfix.
2217 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2219 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2220 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2226 TF/01 Correctly close the server side of TLS when forking for delivery.
2228 When a message was received over SMTP with TLS, Exim failed to clear up
2229 the incoming connection properly after forking off the child process to
2230 deliver the message. In some situations the subsequent outgoing
2231 delivery connection happened to have the same fd number as the incoming
2232 connection previously had. Exim would try to use TLS and fail, logging
2233 a "Bad file descriptor" error.
2235 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2236 utilities have not been installed.
2238 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2239 temporary space as the ACL may create new global variables.
2241 TL/01 LDAP support uses per connection or global context settings, depending
2242 upon the detected version of the libraries at build time.
2244 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2245 to extract and use the src ip:port in logging and expansions as if it
2246 were a direct connection from the outside internet. PPv2 support was
2247 updated based on HAProxy spec change in May 2014.
2249 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2251 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2252 Properly escape header and check for NULL return.
2254 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2257 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2259 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2260 characters in header names, implemented as a verify condition.
2261 Contributed by Michael Fischer v. Mollard.
2263 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2264 results permerror and temperror. Previous values are deprecated but
2265 still accepted. In a future release, err_perm and err_temp will be
2266 completely removed, which will be a backward incompatibility if the
2267 ACL tests for either of these two old results. Patch contributed by
2268 user bes-internal on the mailing list.
2270 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2272 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2273 selectors, in both main and reject logs.
2275 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2278 JH/07 Add malware type "sock" for talking to simple daemon.
2280 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2282 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2283 routers/transports under cutthrough routing.
2285 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2286 numbers. Touch up "bool" conditional to keep the same definition.
2288 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2290 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2292 JH/12 Expand items in router/transport headers_add or headers_remove lists
2293 individually rather than the list as a whole. Bug 1452.
2295 Required for reasonable handling of multiple headers_ options when
2296 they may be empty; requires that headers_remove items with embedded
2297 colons must have them doubled (or the list-separator changed).
2299 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2300 view the policy declared in the DMARC record. Currently, $dmarc_status
2301 is a combined value of both the record presence and the result of the
2304 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2306 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2307 dnslookup router and the smtp transport (applying to the forward
2310 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2311 of ldap servers used for a specific lookup. Patch provided by Heiko
2314 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2315 New variable $lookup_dnssec_authenticated for observability.
2317 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2318 Patch submitted by Lars Timman.
2320 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2322 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2323 Requires trusted mode and valid format message id, aborts otherwise.
2324 Patch contributed by Heiko Schlichting.
2326 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2327 certextract with support for various fields. Bug 1358.
2329 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2330 is requested by default, modifiable by smtp transport option
2333 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2334 operate on certificate variables to give certificate fingerprints
2335 Also new ${sha256:cert_variable}.
2337 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2339 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2340 Christian Aistleitner.
2342 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2344 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2345 file. Patch from Wolfgang Breyha.
2347 JH/25 Expand the coverage of the delivery $host and $host_address to
2348 client authenticators run in verify callout. Bug 1476.
2350 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2351 align with daemon_smtp_ports. Bug 72.
2353 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2354 support and error reporting did not work properly.
2356 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2357 and is readable. Patch from Andrew Colin Kissa.
2359 TL/14 Enhance documentation of ${run expansion and how it parses the
2360 commandline after expansion, particularly in the case when an
2361 unquoted variable expansion results in an empty value.
2363 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2365 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2366 by renaming away from it. Addresses GH issue 15, reported by
2369 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2371 TL/15 SECURITY: prevent double expansion in math comparison functions
2372 (can expand unsanitized data). Not remotely exploitable.
2379 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2381 PP/02 Make -n do something, by making it not do something.
2382 When combined with -bP, the name of an option is not output.
2384 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2387 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2388 $sender_host_name and config options to manage this, and basic check
2391 PP/05 DSCP support for outbound connections and control modifier for inbound.
2393 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2394 (Only plugin which currently uses this is kerberos4, which nobody should
2395 be using, but we should make it available and other future plugins might
2396 conceivably use it, even though it would break NAT; stuff *should* be
2397 using channel bindings instead).
2399 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2400 name; added for Sendmail compatibility; requires admin caller.
2401 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2402 just ignore it); requires trusted caller.
2403 Also parse but ignore: -Ac -Am -X<logfile>
2406 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2408 TL/02 Add +smtp_confirmation as a default logging option.
2410 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2411 Patch by Magnus Holmgren from 2007-02-20.
2413 TL/04 Bugzilla 1281 - Spec typo.
2414 Bugzilla 1283 - Spec typo.
2415 Bugzilla 1290 - Spec grammar fixes.
2417 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2419 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2421 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2422 mailing list by by Dmitry Isaikin.
2424 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2426 JH/02 Support "G" suffix to numbers in ${if comparisons.
2428 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2430 NM/01 Bugzilla 1197 - Spec typo
2431 Bugzilla 1196 - Spec examples corrections
2433 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2435 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2436 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2439 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2440 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2442 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2443 "acl {{name}{arg}...}", and optional args on acl condition
2446 JH/05 Permit multiple router/transport headers_add/remove lines.
2448 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2450 JH/07 Avoid using a waiting database for a single-message-only transport.
2451 Performance patch from Paul Fisher. Bugzilla 1262.
2453 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2456 JH/09 Add $headers_added variable, with content from use of ACL modifier
2457 add_header (but not yet added to the message). Bugzilla 199.
2459 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2460 Pulled from Bugzilla 817 by Wolfgang Breyha.
2462 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2464 (nb: this is the same fix as in Exim 4.80.1)
2466 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2469 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2472 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2474 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2475 advertise SMTP AUTH mechanism to us, instead of a generic
2476 protocol violation error. Also, make Exim more robust to bad
2477 data from the Dovecot auth socket.
2479 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2481 When a queue runner is handling a message, Exim first routes the
2482 recipient addresses, during which it prunes them based on the retry
2483 hints database. After that it attempts to deliver the message to
2484 any remaining recipients. It then updates the hints database using
2487 So if a recipient address works intermittently, it can get repeatedly
2488 deferred at routing time. The retry hints record remains fresh so the
2489 address never reaches the final cutoff time.
2491 This is a fairly common occurrence when a user is bumping up against
2492 their storage quota. Exim had some logic in its local delivery code
2493 to deal with this. However it did not apply to per-recipient defers
2494 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2496 This change adds a proper retry rule check during routing so that the
2497 final cutoff time is checked against the message's age. We only do
2498 this check if there is an address retry record and there is not a
2499 domain retry record; this implies that previous attempts to handle
2500 the address had the retry_use_local_parts option turned on. We use
2501 this as an approximation for the destination being like a local
2502 delivery, as in LMTP.
2504 I suspect this new check makes the old local delivery cutoff check
2505 redundant, but I have not verified this so I left the code in place.
2507 TF/02 Correct gecos expansion when From: is a prefix of the username.
2509 Test 0254 submits a message to Exim with the header
2513 When I ran the test suite under the user fanf2, Exim expanded
2514 the header to contain my full name, whereas it should have added
2515 a Resent-Sender: header. It erroneously treats any prefix of the
2516 username as equal to the username.
2518 This change corrects that bug.
2520 GF/01 DCC debug and logging tidyup
2521 Error conditions log to paniclog rather than rejectlog.
2522 Debug lines prefixed by "DCC: " to remove any ambiguity.
2524 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2526 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2527 Bug spotted by Jeremy Harris; was flawed since initial commit.
2528 Would have resulted in OCSP responses post-SNI triggering an Exim
2529 NULL dereference and crash.
2531 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2533 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2534 Bug detection, analysis and fix by Samuel Thibault.
2535 Bugzilla 1331, Debian bug #698092.
2537 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2539 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2540 Server implementation by Todd Lyons, client by JH.
2541 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2542 config variable "prdr_enable" controls whether the server
2543 advertises the facility. If the client requests PRDR a new
2544 acl_data_smtp_prdr ACL is called once for each recipient, after
2545 the body content is received and before the acl_smtp_data ACL.
2546 The client is controlled by both of: a hosts_try_prdr option
2547 on the smtp transport, and the server advertisement.
2548 Default client logging of deliveries and rejections involving
2549 PRDR are flagged with the string "PRDR".
2551 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2552 fclose(). Diagnosis by Todd Lyons.
2554 PP/17 Update configure.default to handle IPv6 localhost better.
2555 Patch by Alain Williams (plus minor tweaks).
2558 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2559 This is now consistent with GnuTLS, and is now documented: the
2560 previous undocumented portable approach to treating the option as
2561 unset was to force an expansion failure. That still works, and
2562 an empty string is now equivalent.
2564 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2565 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2566 not performing validation itself.
2568 PP/20 Added force_command boolean option to pipe transport.
2569 Patch from Nick Koston, of cPanel Inc.
2571 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2574 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2576 PP/21 Fix eximon continuous updating with timestamped log-files.
2577 Broken in a format-string cleanup in 4.80, missed when I repaired the
2578 other false fix of the same issue.
2579 Report and fix from Heiko Schlichting.
2582 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2583 Report from Prashanth Katuri.
2585 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2586 It's SecureTransport, so affects any MacOS clients which use the
2587 system-integrated TLS libraries, including email clients.
2589 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2590 using a MIME ACL for non-SMTP local injection.
2591 Report and assistance in diagnosis by Warren Baker.
2593 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2595 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2597 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2598 last id that failed so it may be referenced in subsequent ACL's.
2600 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2603 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2604 ldap library initialization, allowing self-signed CA's to be
2605 used. Also properly sets require_cert option later in code by
2606 using NULL (global ldap config) instead of ldap handle (per
2607 session). Bug diagnosis and testing by alxgomz.
2609 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2610 the src/util/ subdirectory.
2612 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2613 renamed to Transport Post Delivery Action by Jeremy Harris, as
2616 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2617 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2618 redis_servers = needs to be configured which will be used by the redis
2619 lookup. Patch from Warren Baker, of The Packet Hub.
2621 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2623 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2624 hostname or reverse DNS when processing a host list. Used suggestions
2625 from multiple comments on this bug.
2627 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2629 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2630 Missed a few lines, added it to make the runtest require no keyboard
2633 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2634 contains upper case chars. Make router use caseful_local_part.
2636 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2637 support when GnuTLS has been built with p11-kit.
2643 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2645 This, or similar/improved, will also be change PP/11 of 4.82.
2651 PP/01 Handle short writes when writing local log-files.
2652 In practice, only affects FreeBSD (8 onwards).
2653 Bugzilla 1053, with thanks to Dmitry Isaikin.
2655 NM/01 Bugzilla 949 - Documentation tweak
2657 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2660 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2662 PP/02 Implemented gsasl authenticator.
2664 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2666 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2667 `pkg-config foo` for cflags/libs.
2669 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2670 with rest of GSASL and with heimdal_gssapi.
2672 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2673 `pkg-config foo` for cflags/libs for the TLS implementation.
2675 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2676 properties get this fed in as external SSF. A number of robustness
2677 and debugging improvements to the cyrus_sasl authenticator.
2679 PP/08 cyrus_sasl server now expands the server_realm option.
2681 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2682 Patch by Jeremy Harris.
2684 PP/10 Added dbmjz lookup type.
2686 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2688 PP/12 MAIL args handles TAB as well as SP, for better interop with
2689 non-compliant senders.
2690 Analysis and variant patch by Todd Lyons.
2692 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2693 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2694 Patch from Dirk Mueller <dmueller@suse.com>
2696 PP/13 tls_peerdn now print-escaped for spool files.
2697 Observed some $tls_peerdn in wild which contained \n, which resulted
2698 in spool file corruption.
2700 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2701 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2702 or write after TLS renegotiation, which otherwise led to messages
2705 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2706 as a tracking header (ie: a signed header comes before the signature).
2707 Patch from Wolfgang Breyha.
2709 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2710 comma-sep list; embedded commas doubled.
2712 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2714 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2716 Report and patch from Dmitry Banschikov.
2718 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2719 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2720 failures. We appear to now support TLS1.1+ with Exim.
2722 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2723 lets Exim select keys and certificates based upon TLS SNI from client.
2724 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2725 before an outbound SMTP session. New log_selector, +tls_sni.
2727 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2728 NULL dereference. Report and patch from Alun Jones.
2730 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2731 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2732 Not seeing resolver debug output on NetBSD, but suspect this is a
2733 resolver implementation change.
2735 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2736 Left warnings. Added "eximon gdb" invocation mode.
2738 PP/21 Defaulting "accept_8bitmime" to true, not false.
2740 PP/22 Added -bw for inetd wait mode support.
2742 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2743 locate the relevant includes and libraries. Made this the default.
2745 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2746 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2748 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2749 This may cause build issues on older platforms.
2751 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2752 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2753 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2754 Added SNI support via GnuTLS too.
2755 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2757 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2759 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2760 Applied second patch from Janne, implementing suggestion to default
2761 multiple-strings-in-record handling to match SPF spec.
2763 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2765 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2766 read-only, out of scope).
2767 Patch from Wolfgang Breyha, report from Stuart Northfield.
2769 PP/29 Fix three issues highlighted by clang analyser static analysis.
2770 Only crash-plausible issue would require the Cambridge-specific
2771 iplookup router and a misconfiguration.
2772 Report from Marcin Mirosław.
2774 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2776 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2777 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2778 As part of this, removing so much warning spew let me fix some minor
2779 real issues in debug logging.
2781 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2782 assignment on my part. Fixed.
2784 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2785 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2786 Janne Snabb (who went above and beyond: thank you).
2788 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2789 string otherwise requires a connection and a bunch more work and it's
2790 relatively easy to get wrong. Should also expose TLS library linkage
2793 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2794 64-bit ${eval} (JH/03).
2796 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2797 GNU libc to support some of the 64-bit stuff, should not lead to
2798 conflicts. Defined before os.h is pulled in, so if a given platform
2799 needs to override this, it can.
2801 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2802 protection layer was required, which is not implemented.
2803 Bugzilla 1254, patch from Wolfgang Breyha.
2805 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2806 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2807 tls_dhparam take prime identifiers. Also unbreak combination of
2808 OpenSSL+DH_params+TLSSNI.
2810 PP/39 Disable SSLv2 by default in OpenSSL support.
2816 PP/01 Solaris build fix for Oracle's LDAP libraries.
2817 Bugzilla 1109, patch from Stephen Usher.
2819 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2821 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2824 TF/02 Fix a couple more cases where we did not log the error message
2825 when unlink() failed. See also change 4.74-TF/03.
2827 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2828 lock up or crash if it happened to be inside a call to libc when it
2829 got a SIGUSR1 from exiwhat.
2831 The SIGUSR1 handler appends the current process status to the process
2832 log which is later printed by exiwhat. It used to use the general
2833 purpose logging code to do this, but several functions it calls are
2834 not safe for signals.
2836 The new output code in the SIGUSR1 handler is specific to the process
2837 log, and simple enough that it's easy to inspect for signal safety.
2838 Removing some special cases also simplifies the general logging code.
2839 Removing the spurious timestamps from the process log simplifies
2842 TF/04 Improved ratelimit ACL condition.
2844 The /noupdate option has been deprecated in favour of /readonly which
2845 has clearer semantics. The /leaky, /strict, and /readonly update modes
2846 are mutually exclusive. The update mode is no longer included in the
2847 database key; it just determines when the database is updated. (This
2848 means that when you upgrade Exim will forget old rate measurements.)
2850 Exim now checks that the per_* options are used with an update mode that
2851 makes sense for the current ACL. For example, when Exim is processing a
2852 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2853 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2854 must specify per_mail/readonly. If you omit the update mode it defaults to
2855 /leaky where that makes sense (as before) or /readonly where required.
2857 The /noupdate option is now undocumented but still supported for
2858 backwards compatibility. It is equivalent to /readonly except that in
2859 ACLs where /readonly is required you may specify /leaky/noupdate or
2860 /strict/noupdate which are treated the same as /readonly.
2862 A useful new feature is the /count= option. This is a generalization
2863 of the per_byte option, so that you can measure the throughput of other
2864 aggregate values. For example, the per_byte option is now equivalent
2865 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2867 The per_rcpt option has been generalized using the /count= mechanism
2868 (though it's more complicated than the per_byte equivalence). When it is
2869 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2870 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2871 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2872 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2873 Note that using per_rcpt with a non-readonly update mode in more than
2874 one ACL will cause the recipients to be double-counted. (The per_mail
2875 and per_byte options don't have this problem.)
2877 The handling of very low rates has changed slightly. If the computed rate
2878 is less than the event's count (usually one) then this event is the first
2879 after a long gap. In this case the rate is set to the same as this event's
2880 count, so that the first message of a spam run is counted properly.
2882 The major new feature is a mechanism for counting the rate of unique
2883 events. The new per_addr option counts the number of different
2884 recipients that someone has sent messages to in the last time period. It
2885 behaves like per_rcpt if all the recipient addresses are different, but
2886 duplicate recipient addresses do not increase the measured rate. Like
2887 the /count= option this is a general mechanism, so the per_addr option
2888 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2889 example, measure the rate that a client uses different sender addresses
2890 with the options per_mail/unique=$sender_address. There are further
2891 details in the main documentation.
2893 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2895 TF/06 Removed a few PCRE remnants.
2897 TF/07 Automatically extract Exim's version number from tags in the git
2898 repository when doing development or release builds.
2900 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2901 Bugzilla 879. Patch from Paul Fisher.
2903 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2904 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2907 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2909 PP/05 Variable $av_failed, true if the AV scanner deferred.
2910 Bugzilla 1078. Patch from John Horne.
2912 PP/06 Stop make process more reliably on build failure.
2913 Bugzilla 1087. Patch from Heiko Schlittermann.
2915 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2916 Bugzilla 1089. Patch from Heiko Schlittermann.
2918 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2919 Bugzilla 1131. Patch from Holger Weiß.
2921 PP/09 Handle IPv6 addresses with SPF.
2922 Bugzilla 860. Patch from Wolfgang Breyha.
2924 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2926 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2929 PP/11 match_* no longer expand right-hand-side by default.
2930 New compile-time build option, EXPAND_LISTMATCH_RHS.
2931 New expansion conditions, "inlist", "inlisti".
2933 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2935 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2937 PP/14 fix log_write() format string regression from TF/03.
2938 Bugzilla 1152. Patch from Dmitry Isaikin.
2944 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2946 PP/02 Harmonised TLS library version reporting; only show if debugging.
2947 Layout now matches that introduced for other libraries in 4.74 PP/03.
2949 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2951 PP/04 New "dns_use_edns0" global option.
2953 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2956 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2957 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2959 TK/01 Updated PolarSSL code to 0.14.2.
2960 Bugzilla 1097. Patch from Andreas Metzler.
2962 PP/07 Catch divide-by-zero in ${eval:...}.
2963 Fixes bugzilla 1102.
2965 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2968 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2969 format-string attack -- SECURITY: remote arbitrary code execution.
2971 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2972 time unintentionally subject to list matching rules, letting the header
2973 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2974 arbitrary string expansion). This allowed for information disclosure.
2976 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2977 INT_MIN/-1 -- value coerced to INT_MAX.
2983 NM/01 Workaround for PCRE version dependency in version reporting
2986 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2987 This fixes portability to compilers other than gcc, notably
2988 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2990 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2991 makefiles for portability to HP-UX and POSIX correctness.
2993 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2994 Also via indented variable definition in the Makefile.
2995 (Debugging by Oliver Heesakkers).
2997 PP/02 Restore caching of spamd results with expanded spamd_address.
2998 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3000 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3001 Improves build reliability. Fix from: Frank Elsner
3003 NM/02 Fix wide character breakage in the rfc2047 coding
3004 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3006 NM/03 Allow underscore in dnslist lookups
3007 Fixes bug 1026. Patch from Graeme Fowler
3009 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3010 Code patches from Adam Ciarcinski of NetBSD.
3012 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3015 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3016 is logged, to avoid truncation. Patch from John Horne.
3018 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3019 Patch from Jakob Hirsch.
3021 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3022 SQL string expansion failure details.
3023 Patch from Andrey Oktyabrski.
3025 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3026 Patch from Simon Arlott.
3028 PP/09 New lookups functionality failed to compile on old gcc which rejects
3029 extern declarations in function scope.
3030 Patch from Oliver Fleischmann
3032 PP/10 Use sig_atomic_t for flags set from signal handlers.
3033 Check getgroups() return and improve debugging.
3034 Fixed developed for diagnosis in bug 927 (which turned out to be
3037 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3038 Patch from Mark Zealey.
3040 PP/12 Bugzilla 1056: Improved spamd server selection.
3041 Patch from Mark Zealey.
3043 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3044 Based on patch from Heiko Schlittermann.
3046 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3047 Patch from Uwe Doering, sign-off by Michael Haardt.
3049 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3050 variable declaration deep within a block. Bug and patch from
3053 PP/15 lookups-Makefile IRIX compatibility coercion.
3055 PP/16 Make DISABLE_DKIM build knob functional.
3057 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3058 Patch by Simon Arlott
3060 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3061 variable argument macros. Our copy now differs from upstream.
3067 TF/01 Failure to get a lock on a hints database can have serious
3068 consequences so log it to the panic log.
3070 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3071 controlled using the smtp_confirmation log selector.
3073 TF/03 Include the error message when we fail to unlink a spool file.
3075 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3076 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3077 for maintaining out-of-tree patches for some time.
3079 PP/01 Bugzilla 139: Documentation and portability issues.
3080 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3081 Handle per-OS dynamic-module compilation flags.
3083 PP/02 Let /dev/null have normal permissions.
3084 The 4.73 fixes were a little too stringent and complained about the
3085 permissions on /dev/null. Exempt it from some checks.
3086 Reported by Andreas M. Kirchwitz.
3088 PP/03 Report version information for many libraries, including
3089 Exim version information for dynamically loaded libraries. Created
3090 version.h, now support a version extension string for distributors
3091 who patch heavily. Dynamic module ABI change.
3093 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3094 privilege escalation vulnerability whereby the Exim run-time user
3095 can cause root to append content of the attacker's choosing to
3098 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3101 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3102 If dropping privileges for untrusted macros, we disabled normal logging
3103 on the basis that it would fail; for the Exim run-time user, this is not
3104 the case, and it resulted in successful deliveries going unlogged.
3105 Fixed. Reported by Andreas Metzler.
3111 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3112 only prepend for the Resent-* case. Fixes regression introduced in
3113 Exim 4.70 by NM/22 for Bugzilla 607.
3115 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3116 increasing numbers of administrators be bitten by this.
3118 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3120 PP/03 Bugzilla 994: added openssl_options main configuration option.
3122 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3124 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3126 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3128 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3129 without a peer certificate, leading to a segfault because of an
3130 assumption that peers always have certificates. Be a little more
3131 paranoid. Problem reported by Martin Tscholak.
3133 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3134 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3135 NB: ClamAV planning to remove STREAM in "middle of 2010".
3136 CL also introduces -bmalware, various -d+acl logging additions and
3137 more caution in buffer sizes.
3139 PP/09 Implemented reverse_ip expansion operator.
3141 PP/10 Bugzilla 937: provide a "debug" ACL control.
3143 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3145 PP/12 Bugzilla 973: Implement --version.
3147 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3149 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3151 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3153 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3154 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3155 ignore trailing whitespace.
3157 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3159 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3162 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3163 Notification from Dr Andrew Aitchison.
3165 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3166 ExtendedDetectionInfo response format.
3167 Notification from John Horne.
3169 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3172 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3173 XSL and documented dependency on system catalogs, with examples of how
3176 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3179 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3180 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3181 configuration file which is writeable by the Exim user or group.
3183 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3184 of configuration files to cover files specified with the -C option if
3185 they are going to be used with root privileges, not just the default
3188 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3189 option (effectively making it always true).
3191 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3192 files to be used while preserving root privileges.
3194 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3195 that rogue child processes cannot use them.
3197 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3198 run-time user, instead of root.
3200 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3201 Exim run-time user without dropping privileges.
3203 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3204 result string, instead of calling string_vformat() twice with the same
3207 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3208 for other users. Others should always drop root privileges if they use
3209 -C on the command line, even for a whitelisted configure file.
3211 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3213 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3219 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3220 $data_path, and $header_path variables; fixed documentation bugs and
3223 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3224 exipick to access non-standard spools, including the "frozen" queue
3227 NM/01 Bugzilla 965: Support mysql stored procedures.
3228 Patch from Alain Williams
3230 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3232 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3233 Patch from Andreas Metzler
3235 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3236 Patch from Kirill Miazine
3238 NM/05 Bugzilla 671: Added umask to procmail example.
3240 JJ/03 installed exipick 20100323.0, fixing doc bug
3242 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3243 directory. Notification and patch from Dan Rosenberg.
3245 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3247 TK/02 Improve log output when DKIM signing operation fails.
3249 MH/01 Treat the transport option dkim_domain as a colon separated
3250 list, not as a single string, and sign the message with each element,
3251 omitting multiple occurences of the same signer.
3253 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3254 Bugzilla 985, 986. Patch by Simon Arlott
3256 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3257 Patch by Simon Arlott
3259 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3260 MBX locking. Notification from Dan Rosenberg.
3266 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3268 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3270 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3272 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3274 NM/04 Bugzilla 915: Flag broken perl installation during build.
3280 TK/01 Added patch by Johannes Berg that expands the main option
3281 "spamd_address" if it starts with a dollar sign.
3283 TK/02 Write list of recipients to X-Envelope-Sender header when building
3284 the mbox-format spool file for content scanning (suggested by Jakob
3287 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3288 (http://www.dcc-servers.net/) support via dccifd. Activated by
3289 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3291 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3292 by Mark Daniel Reidel <mr@df.eu>.
3294 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3295 When building exim an external PCRE library is now needed -
3296 PCRE is a system library on the majority of modern systems.
3297 See entry on PCRE_LIBS in EDITME file.
3299 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3300 conversation. Added nologin parameter to request.
3301 Patch contributed by Kirill Miazine.
3303 TF/01 Do not log submission mode rewrites if they do not change the address.
3305 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3307 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3308 log files in place. Contributed by Roberto Lima.
3310 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3312 TF/03 Bugzilla 615: When checking the local_parts router precondition
3313 after a local_part_suffix or local_part_prefix option, Exim now
3314 does not use the address's named list lookup cache, since this
3315 contains cached lookups for the whole local part.
3317 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3318 Robert Millan. Documentation is in experimental-spec.txt.
3320 TF/04 Bugzilla 668: Fix parallel build (make -j).
3322 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3324 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3325 Patch provided by Jan Srzednicki.
3327 TF/05 Leading white space used to be stripped from $spam_report which
3328 wrecked the formatting. Now it is preserved.
3330 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3331 that they are available at delivery time.
3333 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3335 TF/08 TLS error reporting now respects the incoming_interface and
3336 incoming_port log selectors.
3338 TF/09 Produce a more useful error message if an SMTP transport's hosts
3339 setting expands to an empty string.
3341 NM/06 Bugzilla 744: EXPN did not work under TLS.
3342 Patch provided by Phil Pennock.
3344 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3345 Patch provided by Richard Godbee.
3347 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3348 acl_smtp_notquit, added index entry.
3350 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3351 Patch provided by Eugene Bujak.
3353 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3354 accept(). Patch provided by Maxim Dounin.
3356 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3357 Patch provided by Phil Pennock.
3359 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3361 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3362 Patch provided by Brad "anomie" Jorsch.
3364 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3365 Patch provided by Dean Brooks.
3367 TK/05 Add native DKIM support (does not depend on external libraries).
3369 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3370 Patch provided by Graeme Fowler.
3372 NM/16 Bugzilla 851: Documentation example syntax fix.
3374 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3376 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3379 NM/19 Bugzilla 745: TLS version reporting.
3380 Patch provided by Phil Pennock.
3382 NM/20 Bugzilla 167: bool: condition support.
3383 Patch provided by Phil Pennock.
3385 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3386 clients. Patch provided by Phil Pennock.
3388 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3389 Patch provided by Brad "anomie" Jorsch.
3391 NM/23 Bugzilla 687: Fix misparses in eximstats.
3392 Patch provided by Heiko Schlittermann.
3394 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3395 Patch provided by Heiko Schlittermann.
3397 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3398 plus update to original patch.
3400 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3402 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3403 Patch provided by David Brownlee.
3405 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3407 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3409 NM/30 Bugzilla 888: TLS documentation bugfixes.
3411 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3413 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3414 Unlike the original bugzilla I have changed all shell scripts in src tree.
3416 NM/33 Bugzilla 898: Transport filter timeout fix.
3417 Patch by Todd Rinaldo.
3419 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3420 Patch by Serge Demonchaux.
3422 NM/35 Bugzilla 39: Base64 decode bug fixes.
3423 Patch by Jakob Hirsch.
3425 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3427 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3429 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3431 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3437 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3438 ALT-N's libdkim that I have put here:
3439 http://duncanthrax.net/exim-experimental/
3441 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3442 were called 'true' and it seems that C99 defines that as a reserved
3443 keyword to be used with 'bool' variable types. That means you could
3444 not include C99-style headers which use bools without triggering
3445 build errors in sieve.c.
3447 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3448 as mailq or other aliases. Changed the --help handling significantly
3449 to do whats expected. exim_usage() emits usage/help information.
3451 SC/01 Added the -bylocaldomain option to eximstats.
3453 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3455 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3457 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3463 PH/01 Another patch from the Sieve maintainer.
3465 PH/02 When an IPv6 address is converted to a string for single-key lookup
3466 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3467 dots are used instead of colons so that keys in lsearch files need not
3468 contain colons. This was done some time before quoting was made available
3469 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3470 (notated using the quote facility) so as to distinguish them from IPv4
3471 keys. This meant that lookups for IP addresses in host lists did not work
3472 for iplsearch lookups.
3474 This has been fixed by arranging for IPv6 addresses to be expressed with
3475 colons if the lookup type is iplsearch. This is not incompatible, because
3476 previously such lookups could never work.
3478 The situation is now rather anomalous, since one *can* have colons in
3479 ordinary lsearch keys. However, making the change in all cases is
3480 incompatible and would probably break a number of configurations.
3482 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3485 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3486 conversion specification without a maximum field width, thereby enabling
3487 a rogue spamd server to cause a buffer overflow. While nobody in their
3488 right mind would setup Exim to query an untrusted spamd server, an
3489 attacker that gains access to a server running spamd could potentially
3490 exploit this vulnerability to run arbitrary code as the Exim user.
3492 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3493 $primary_hostname instead of what libspf2 thinks the hosts name is.
3495 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3496 a directory entry by the name of the lookup key. Previously, if a
3497 symlink pointed to a non-existing file or a file in a directory that
3498 Exim lacked permissions to read, a lookup for a key matching that
3499 symlink would fail. Now it is enough that a matching directory entry
3500 exists, symlink or not. (Bugzilla 503.)
3502 PH/03 The body_linecount and body_zerocount variables are now exported in the
3505 PH/04 Added the $dnslist_matched variable.
3507 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3508 This means they are set thereafter only if the connection becomes
3511 PH/06 Added the client_condition to authenticators so that some can be skipped
3512 by clients under certain conditions.
3514 PH/07 The error message for a badly-placed control=no_multiline_responses left
3515 "_responses" off the end of the name.
3517 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3519 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3520 (without spaces) instead of just copying the configuration text.
3522 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3524 PH/11 Added $max_received_linelength.
3526 PH/12 Added +ignore_defer and +include_defer to host lists.
3528 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3529 way in which PCRE > 7.0 is built.
3531 PH/14 Implemented queue_only_load_latch.
3533 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3534 MAIL command. The effect was to mangle the value on 64-bit systems.
3536 PH/16 Another patch from the Sieve maintainer.
3538 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3540 PH/18 If a system quota error occurred while trying to create the file for
3541 a maildir delivery, the message "Mailbox is full" was not appended to the
3542 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3543 only to a quota excession during the actual writing of the file.
3545 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3546 characters?) which causes problems in log lines. The DN values are now
3547 passed through string_printing() before being added to log lines.
3549 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3550 and InterBase are left for another time.)
3552 PH/21 Added message_body_newlines option.
3554 PH/22 Guard against possible overflow in moan_check_errorcopy().
3556 PH/23 POSIX allows open() to be a macro; guard against that.
3558 PH/24 If the recipient of an error message contained an @ in the local part
3559 (suitably quoted, of course), incorrect values were put in $domain and
3560 $local_part during the evaluation of errors_copy.
3566 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3567 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3570 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3571 issue a MAIL command.
3573 PH/02 In an ACL statement such as
3575 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3577 if a client was not listed at all, or was listed with a value other than
3578 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3579 the condition was not true (as it should be), so access was not denied.
3580 The bug was that the ! inversion was incorrectly passed on to the second
3581 item. This has been fixed.
3583 PH/03 Added additional dnslists conditions == and =& which are different from
3584 = and & when the dns lookup returns more than one IP address.
3586 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3587 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3589 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3590 FSYNC, which compiles an option called disable_fsync that allows for
3591 bypassing fsync(). The documentation is heavily laced with warnings.
3593 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3595 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3596 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3597 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3598 including adding "make clean"; (3) Added -fPIC when compiling the test
3599 dynamically loaded module, to get rid of a warning.
3601 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3602 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3603 = 0s. The bug is otherwise harmless.
3605 PH/07 There was a bug in the dovecot authenticator such that the value of
3606 $auth1 could be overwritten, and so not correctly preserved, after a
3607 successful authentication. This usually meant that the value preserved by
3608 the server_setid option was incorrect.
3610 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3612 PH/09 Installed PCRE release 7.0.
3614 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3615 run for batched SMTP input. It is now run at the start of every message
3616 in the batch. While fixing this I discovered that the process information
3617 (output by running exiwhat) was not always getting set for -bs and -bS
3618 input. This is fixed, and it now also says "batched" for BSMTP.
3620 PH/11 Added control=no_pipelining.
3622 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3623 patch, slightly modified), and move the expansion of helo_data till after
3624 the connection is made in the smtp transport (so it can use these
3627 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3629 PH/14 Added log_selector = +pid.
3631 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3633 PH/16 Add ${if forany and ${if forall.
3635 PH/17 Added dsn_from option to vary the From: line in DSNs.
3637 PH/18 Flush SMTP output before performing a callout, unless control =
3638 no_callout_flush is set.
3640 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3641 was true (the default) a successful delivery failed to delete the retry
3642 item, thus causing premature timeout of the address. The bug is now
3645 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3647 PH/21 Long custom messages for fakedefer and fakereject are now split up
3648 into multiline responses in the same way that messages for "deny" and
3649 other ACL rejections are.
3651 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3652 with slight modification.
3654 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3655 draft, changing the syntax and factoring some duplicate code".
3657 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3658 for deliveries of the second and subsequent messages over the same SMTP
3661 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3662 ${reduce, with only minor "tidies".
3664 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3666 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3667 expansion side effects.
3669 PH/27 When a message times out after an over-quota error from an Exim-imposed
3670 quota, the bounce message says "mailbox is full". This message was not
3671 being given when it was a system quota that was exceeded. It now should
3674 MH/03 Made $recipients available in local_scan(). local_scan() already has
3675 better access to the recipient list through recipients_list[], but
3676 $recipients can be useful in postmaster-provided expansion strings.
3678 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3679 in the case of a MAIL command with additional options following the
3680 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3681 were accidentally chopped off.
3683 PH/29 SMTP synchronization checks are implemented when a command is read -
3684 there is a check that no more input is waiting when there shouldn't be
3685 any. However, for some commands, a delay in an ACL can mean that it is
3686 some time before the response is written. In this time, more input might
3687 arrive, invalidly. So now there are extra checks after an ACL has run for
3688 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3689 pipelining has not been advertised.
3691 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3693 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3694 returned in the SMTP response when smtp_return_error_details was false.
3695 This has been fixed.
3697 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3698 instead of the C I/O that was originally supplied, because problems were
3699 reported on Solaris.
3701 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3702 Exim which did not show up earlier: it was assuming that a call to
3703 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3704 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3705 was a macro that became an assignment, so it seemed to work. This has
3706 changed to a proper function call with a void return, hence the compile
3707 error. Exim's code has been fixed.
3709 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3712 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3714 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3716 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3717 because it turns out to be too big or there is a timeout) there is no
3718 "Completed" line in the log. When some messages of this type were
3719 selected by exigrep, they were listed as "not completed". Others were
3720 picked up by some special patterns. I have improved the selection
3721 criteria to be more general.
3723 PH/38 The host_find_failed option in the manualroute router can now be set
3724 to "ignore", to completely ignore a host whose IP address cannot be
3725 found. If all hosts are ignored, the behaviour is controlled by the new
3726 host_all_ignored option.
3728 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3729 homing or because of multiple MX records with /mx) generated more than
3730 one IP address, and the following item turned out to be the local host,
3731 all the secondary addresses of the first item were incorrectly removed
3732 from the list, along with the local host and any following hosts (which
3733 is what is supposed to happen).
3735 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3736 whoever called Exim into the -H file. In the case of the daemon it was
3737 behaving confusingly. When first started, it used values for whoever
3738 started the daemon, but after a SIGHUP it used the Exim user (because it
3739 calls itself on a restart). I have changed the code so that it now always
3742 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3743 message are rejected with the same error (e.g. no authentication or bad
3744 sender address), and a DATA command is nevertheless sent (as can happen
3745 with PIPELINING or a stupid MUA), the error message that was given to the
3746 RCPT commands is included in the rejection of the DATA command. This is
3747 intended to be helpful for MUAs that show only the final error to their
3750 PH/42 Another patch from the Sieve maintainer.
3752 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3753 Eximstats - Fixed some broken HTML links and added missing column headers
3755 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3756 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3758 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3760 PH/43 Yet another patch from the Sieve maintainer.
3762 PH/44 I found a way to check for a TCP/IP connection going away before sending
3763 the response to the final '.' that terminates a message, but only in the
3764 case where the client has not sent further data following the '.'
3765 (unfortunately, this is allowed). However, in many cases there won't be
3766 any further data because there won't be any more messages to send. A call
3767 to select() can be used: if it shows that the input is "ready", there is
3768 either input waiting, or the socket has been closed. An attempt to read
3769 the next input character can distinguish the two cases. Previously, Exim
3770 would have sent an OK response which the client would never have see.
3771 This could lead to message repetition. This fix should cure that, at
3772 least in a lot of common cases.
3774 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3775 advertised in response to EHLO.
3781 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3782 fixed by 4.65/MH/01 (is this a record?) are fixed:
3784 (i) An empty string was always treated as zero by the numeric comparison
3785 operators. This behaviour has been restored.
3787 (ii) It is documented that the numeric comparison operators always treat
3788 their arguments as decimal numbers. This was broken in that numbers
3789 starting with 0 were being interpreted as octal.
3791 While fixing these problems I realized that there was another issue that
3792 hadn't been noticed. Values of message_size_limit (both the global option
3793 and the transport option) were treated as octal if they started with 0.
3794 The documentation was vague. These values are now always treated as
3795 decimal, and I will make that clear in the documentation.
3801 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3802 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3805 MH/01 Don't check that the operands of numeric comparison operators are
3806 integers when their expansion is in "skipping" mode (fixes bug
3807 introduced by 4.64-PH/07).
3809 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3810 child addresses, Exim now panics and dies. Previously, because the count
3811 is held in a short int, deliveries were likely to be lost. As such a
3812 large number of recipients for a single message is ridiculous
3813 (performance will be very, very poor), I have chosen to impose a limit
3814 rather than extend the field.
3820 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3821 leftover -K file (the existence of which was triggered by #402).
3822 While we were at it, introduced process PID as part of the -K
3823 filename. This should rule out race conditions when creating
3826 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3827 processing considerably. Previous code took too long for large mails,
3828 triggering a timeout which in turn triggers #401.
3830 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3831 in the DK code in transports.c. sendfile() is not really portable,
3832 hence the _LINUX specificness.
3834 TF/01 In the add_headers option to the mail command in an Exim filter,
3835 there was a bug that Exim would claim a syntax error in any
3836 header after the first one which had an odd number of characters
3839 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3840 callout verification, Exim cached a "reject" for the entire domain. This
3841 is correct for most verifications, but it is not correct for a recipient
3842 verification with use_sender or use_postmaster set, because in that case
3843 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3844 case of MAIL FROM:<> rejection from other early rejections (e.g.
3845 rejection of HELO). When verifying a recipient using a non-null MAIL
3846 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3847 Whatever the result of the callout, the value of the domain cache is
3848 left unchanged (for any other kind of callout, getting as far as trying
3849 RCPT means that the domain itself is ok).
3851 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3854 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3855 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3856 session, the daemon ignores ECONNECT errors and logs others; it now
3857 ignores EPIPE as well.
3859 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3860 (quoted-printable decoding).
3862 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3863 later the small subsequent patch to fix an introduced bug.
3865 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3867 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3869 PH/08 An error is now given if message_size_limit is specified negative.
3871 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3872 to be given (somewhat) arbitrary names.
3874 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3877 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3878 miscellaneous code fixes
3880 PH/10 Added the log_reject_target ACL modifier to specify where to log
3883 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3884 hostname. This is wrong, because it relates to the incoming message (and
3885 probably the interface on which it is arriving) and not to the outgoing
3886 callout (which could be using a different interface). This has been
3887 changed to use the value of the helo_data option from the smtp transport
3888 instead - this is what is used when a message is actually being sent. If
3889 there is no remote transport (possible with a router that sets up host
3890 addresses), $smtp_active_hostname is used.
3892 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3893 tweaks were necessary in order to get it to work (see also 21 below):
3894 (a) The code assumed that strncpy() returns a negative number on buffer
3895 overflow, which isn't the case. Replaced with Exim's string_format()
3897 (b) There were several signed/unsigned issues. I just did the minimum
3898 hacking in of casts. There is scope for a larger refactoring.
3899 (c) The code used strcasecmp() which is not a standard C function.
3900 Replaced with Exim's strcmpic() function.
3901 (d) The code set only $1; it now sets $auth1 as well.
3902 (e) A simple test gave the error "authentication client didn't specify
3903 service in request". It would seem that Dovecot has changed its
3904 interface. Fortunately there's a specification; I followed it and
3905 changed what the client sends and it appears to be working now.
3907 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3910 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3911 address A is aliased to B and C, where B exists and C does not. Without
3912 -v the output is "A verified" because verification stops after a
3913 successful redirection if more than one address is generated. However,
3914 with -v the child addresses are also verified. Exim was outputting "A
3915 failed to verify" and then showing the successful verification for C,
3916 with its parentage. It now outputs "B failed to verify", showing B's
3917 parentage before showing the successful verification of C.
3919 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3920 look up a TXT record in a specific list after matching in a combined
3923 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3924 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3925 they consult the DNS. I had assumed they would set it the way they
3926 wanted; and indeed my experiments on Linux seem to show that in some
3927 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3928 To be on the safe side, however, I have now made the interface to
3929 host_find_byname() similar to host_find_bydns(), with an argument
3930 containing the DNS resolver options. The host_find_byname() function now
3931 sets these options at its start, just as host_find_bydns() does. The smtp
3932 transport options dns_qualify_single and dns_search_parents are passed to
3933 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3934 of host_find_byname() use the default settings of RES_DEFNAMES
3935 (qualify_single) but not RES_DNSRCH (search_parents).
3937 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3938 spool_read_header() do less string testing, by means of a preliminary
3939 switch on the second character of optional "-foo" lines. (This is
3940 overdue, caused by the large number of possibilities that now exist.
3941 Originally there were few.) While I was there, I also converted the
3942 str(n)cmp tests so they don't re-test the leading "-" and the first
3943 character, in the hope this might squeeze out yet more improvement.
3945 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3946 flag allowing group syntax was set by the header_syntax check but not
3947 turned off, possible causing trouble later; (2) The flag was not being
3948 set at all for the header_verify test, causing "group"-style headers to
3949 be rejected. I have now set it in this case, and also caused header_
3950 verify to ignore an empty address taken from a group. While doing this, I
3951 came across some other cases where the code for allowing group syntax
3952 while scanning a header line wasn't quite right (mostly, not resetting
3953 the flag correctly in the right place). These bugs could have caused
3954 trouble for malformed header lines. I hope it is now all correct.
3956 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3957 with the "reply" argument non-NULL. The code, however (which originally
3958 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3959 but it didn't always do it. This confused somebody who was copying the
3960 code for some other use. I have removed all the tests.
3962 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3963 feature that was used to support insecure browsers during the U.S. crypto
3964 embargo. It requires special client support, and Exim is probably the
3965 only MTA that supported it -- and would never use it because real RSA is
3966 always available. This code has been removed, because it had the bad
3967 effect of slowing Exim down by computing (never used) parameters for the
3968 RSA_EXPORT functionality.
3970 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3971 authenticator to fail if there's a tab character in the incoming data
3972 (there should never be unless someone is messing about, as it's supposed
3973 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3974 if the connection is using TLS or if the remote IP is the same as the
3975 local IP, and the "valid-client-cert option" if a client certificate has
3978 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3979 authenticators. This can be used for authorization after authentication
3980 succeeds. (In the case of plaintext, it servers for both authentication
3983 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3984 if any retry times were supplied.
3986 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3987 connection, where there is no client IP address to check. In this
3988 situation, the verify now always succeeds.
3990 PH/25 Applied John Jetmore's -Mset patch.
3992 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3994 PH/27 In a string expansion for a processed (not raw) header when multiple
3995 headers of the same name were present, leading whitespace was being
3996 removed from all of them, but trailing whitespace was being removed only
3997 from the last one. Now trailing whitespace is removed from each header
3998 before concatenation. Completely empty headers in a concatenation (as
3999 before) are ignored.
4001 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4002 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4004 PH/29 [Removed. This was a change that I later backed out, and forgot to
4005 correct the ChangeLog entry (that I had efficiently created) before
4006 committing the later change.]
4008 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4009 address errors (4xx response to RCPT) over the same connection as other
4010 messages routed to the same hosts. Such deliveries are always "forced",
4011 so retry times are not inspected. This resulted in far too many retries
4012 for the affected addresses. The effect occurred only when there were more
4013 hosts than the hosts_max_try setting in the smtp transport when it had
4014 the 4xx errors. Those hosts that it had tried were not added to the list
4015 of hosts for which the message was waiting, so if all were tried, there
4016 was no problem. Two fixes have been applied:
4018 (i) If there are any address or message errors in an SMTP delivery, none
4019 of the hosts (tried or untried) are now added to the list of hosts
4020 for which the message is waiting, so the message should not be a
4021 candidate for sending over the same connection that was used for a
4022 successful delivery of some other message. This seems entirely
4023 reasonable: after all the message is NOT "waiting for some host".
4024 This is so "obvious" that I'm not sure why it wasn't done
4025 previously. Hope I haven't missed anything, but it can't do any
4026 harm, as the worst effect is to miss an optimization.
4028 (ii) If, despite (i), such a delivery is accidentally attempted, the
4029 routing retry time is respected, so at least it doesn't keep
4030 hammering the server.
4032 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4033 in ${readsocket because some servers need this prod.
4035 PH/32 Added some extra debug output when updating a wait-xxx database.
4037 PH/33 The hint "could be header name not terminated by colon", which has been
4038 given for certain expansion errors for a long time, was not being given
4039 for the ${if def:h_colon_omitted{... case.
4041 PH/34 The spec says: "With one important exception, whenever a domain list is
4042 being scanned, $domain contains the subject domain." There was at least
4043 one case where this was not true.
4045 PH/35 The error "getsockname() failed: connection reset by peer" was being
4046 written to the panic log as well as the main log, but it isn't really
4047 panic-worthy as it just means the connection died rather early on. I have
4048 removed the panic log writing for the ECONNRESET error when getsockname()
4051 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4052 runs only) independently of the message's sender address. This meant
4053 that, if the 4xx error was in fact related to the sender, a different
4054 message to the same recipient with a different sender could confuse
4055 things. In particular, this can happen when sending to a greylisting
4056 server, but other circumstances could also provoke similar problems.
4057 I have changed the default so that the retry time for these errors is now
4058 based a combination of the sender and recipient addresses. This change
4059 can be overridden by setting address_retry_include_sender=false in the
4062 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4063 remote server are returned as part of bounce messages. This was not
4064 happening for LMTP over a pipe (the lmtp transport), but now it is the
4065 same for both kinds of LMTP.
4067 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4068 in header lines that were in fact CNAMEs. This is no longer the case.
4070 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4071 and queue runs started by the daemon processed all messages. This has
4072 been fixed so that -R and -S can now usefully be given with -q<time>.
4074 PH/40 Import PCRE release 6.7 (fixes some bugs).
4076 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4078 PH/42 Give an error if -q is specified more than once.
4080 PH/43 Renamed the variables $interface_address and $interface_port as
4081 $received_ip_address and $received_port, to make it clear that these
4082 values apply to message reception, and not to the outgoing interface when
4083 a message is delivered. (The old names remain recognized, of course.)
4085 PH/44 There was no timeout on the connect() call when using a Unix domain
4086 socket in the ${readsocket expansion. There now is.
4088 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4089 be meaningful with "accept".
4091 SC/01 Eximstats V1.43
4092 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4094 SC/02 Eximstats V1.44
4095 Use a glob alias rather than an array ref in the generated
4096 parser. This improves both readability and performance.
4098 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4099 Collect SpamAssassin and rejection statistics.
4100 Don't display local sender or destination tables unless
4101 there is data to show.
4102 Added average volumes into the top table text output.
4104 SC/04 Eximstats V1.46
4105 Collect data on the number of addresses (recipients)
4106 as well as the number of messages.
4108 SC/05 Eximstats V1.47
4109 Added 'Message too big' to the list of mail rejection
4110 reasons (thanks to Marco Gaiarin).
4112 SC/06 Eximstats V1.48
4113 Mainlog lines which have GMT offsets and are too short to
4114 have a flag are now skipped.
4116 SC/07 Eximstats V1.49 (Alain Williams)
4117 Added the -emptyok flag.
4119 SC/08 Eximstats V1.50
4120 Fixes for obtaining the IP address from reject messages.
4122 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4123 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4124 whitespace changes from 4.64-PH/27
4126 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4129 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4130 are found, allow negative numbers in numeric criteria)
4132 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4134 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4135 to match changes made in 4.64-PH/43
4137 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4139 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4140 "domain" is actually an IP address, and force a failure. This locks out
4141 those revolvers/nameservers that support "A-for-A" lookups, in
4142 contravention of the specifications.
4144 PH/48 When a host name was looked up from an IP address, and the subsequent
4145 forward lookup of the name timed out, the host name was left in
4146 $sender_host_name, contrary to the specification.
4148 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4149 restricted to single-key lookups, Exim was not diagnosing an error if
4150 * or *@ was used with a query-style lookup.
4152 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4154 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4155 long ago, but noone interested enough thought of it. Let's just say that
4156 the "1.1" means that there are some new functions that weren't there at
4157 some point in the past.
4159 PH/51 Error processing for expansion failure of helo_data from an smtp
4160 transport during callout processing was broken.
4162 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4163 tested/used via the -bh/-bhc/-bs options.
4165 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4166 bug, fixed in subsequent PCRE releases).
4168 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4169 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4171 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4177 SC/01 Use a glob alias rather than an array ref in eximstats generated
4178 parser. This improves both readability and performance.
4180 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4181 Don't display local sender or destination tables in eximstats unless
4182 there is data to show.
4183 Added average volumes into the eximstats top table text output.
4185 SC/03 Collect data on the number of addresses (recipients) as well
4186 as the number of messages in eximstats.
4188 TF/01 Correct an error in the documentation for the redirect router. Exim
4189 does (usually) call initgroups() when daemonizing.
4191 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4192 with consistent privilege compared to when running as a daemon.
4194 TF/03 Note in the spec that $authenticated_id is not set for local
4195 submissions from trusted users.
4197 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4198 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4200 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4201 by adding some example configuration directives to the default
4202 configuration file. A little bit of work is required to uncomment the
4203 directives and define how usernames and passwords are checked, but
4204 there is now a framework to start from.
4206 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4207 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4208 without this. I don't know how relevant this is to other LDAP libraries.
4210 PH/02 Add the verb name to the "unknown ACL verb" error.
4212 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4214 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4216 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4217 directory not expanded when it should be if an expanded home directory
4218 was set for the address (which is overridden by the transport).
4220 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4223 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4224 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4225 because it is too late at that time, and has no effect.
4227 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4228 security issue with \' (bugzilla #107). I could not use the
4229 PQescapeStringConn() function, because it needs a PGconn value as one of
4232 PH/08 When testing addresses using -bt, indicate those final addresses that
4233 are duplicates that would not cause an additional delivery. At least one
4234 person was confused, thinking that -bt output corresponded to deliveries.
4235 (Suppressing duplicates isn't a good idea as you lose the information
4236 about possibly different redirections that led to the duplicates.)
4238 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4239 systems where poll() doesn't work, in particular OS X.
4241 PH/10 Added more information to debugging output for retry time not reached.
4243 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4244 operations in malware.c.
4246 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4249 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4250 syslog_duplication set false, log lines that would normally be written
4251 both the the main log and to the reject log were not written to syslog at
4254 PH/14 In the default configuration, change the use of "message" in ACL warn
4255 statements to "add_header".
4257 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4258 not followed by a command (e.g. "seen endif").
4260 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4261 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4264 PH/17 Added extra conditions to the default value of delay_warning_condition
4268 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4269 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4270 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4273 The Auto-Submitted: and various List- headers are standardised, whereas I
4274 don't think Precedence: ever was.
4276 PH/18 Refactored debugging code in route_finduser() to show more information,
4277 in particular, the error code if getpwnam() issues one.
4279 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4280 This is apparently needed in addition to the PH/07 change above to avoid
4281 any possible encoding problems.
4283 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4284 but not after initializing Perl.
4286 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4287 output them only if debugging. By default they are written stderr,
4288 apparently, which is not desirable.
4290 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4293 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4296 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4298 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4299 authenticated or an ident call has been made. Suppress the default
4300 values for $authenticated_id and $authenticated_sender (but permit -oMai
4301 and -oMas) when testing with -bh.
4303 PH/24 Re-jigged the order of the tests in the default configuration so that the
4304 tests for valid domains and recipients precede the DNS black list and CSA
4305 tests, on the grounds that those ones are more expensive.
4307 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4308 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4309 This bug exists in every version of Exim that I still have, right back to
4312 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4313 However, an attempt to turn on case-sensitivity in a regex key by
4314 including (?-i) didn't work because the subject string was already
4315 lowercased, and the effects were non-intuitive. It turns out that a
4316 one-line patch can be used to allow (?-i) to work as expected.
4322 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4323 other effects) broke the use of negated acl sub-conditions.
4325 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4328 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4329 "Deny" causes Exim to reject the incoming connection with a 554 error.
4330 Unfortunately, if there is a major crisis, such as a disk failure,
4331 tcp-wrappers gives "deny", whereas what one would like would be some
4332 kind of temporary error. A kludge has been added to help with this.
4333 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4334 554 error is used if errno is still zero or contains ENOENT (which occurs
4335 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4338 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4340 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4341 errors. Otherwise a message that provokes a temporary error (when other
4342 messages do not) can cause a whole host to time out.
4344 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4345 addresses were routed directly to files or pipes from a redirect router.
4346 File deliveries just didn't batch; pipe deliveries might have suffered
4349 PH/06 A failure to get a lock for a hints database would erroneously always say
4350 "Failed to get write lock", even when it was really a read lock.
4352 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4353 of 0600. This has been changed to use the value of the lockfile_mode
4354 option (which defaults to 0600).
4356 PH/08 Applied small patch from the Sieve maintainer.
4358 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4359 folder from quota calculations, a direct delivery into this folder messed
4360 up the contents of the maildirsize file. This was because the regex was
4361 used only to exclude .Trash (or whatever) when the size of the mailbox
4362 was calculated. There was no check that a delivery was happening into an
4363 excluded directory. This bug has been fixed by ignoring all quota
4364 processing for deliveries into excluded directories.
4366 PH/10 Added the maildirfolder_create_regex option to appendfile.
4372 PH/01 The code for finding all the local interface addresses on a FreeBSD
4373 system running IPv6 was broken. This may well have applied to all BSD
4374 systems, as well as to others that have similar system calls. The broken
4375 code found IPv4 interfaces correctly, but gave incorrect values for the
4376 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4377 that it would not match correctly against @[] and not recognize the IPv6
4380 PH/02 The ipliteral router was not recognizing addresses of the form user@
4381 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4383 PH/03 Added disable_ipv6.
4385 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4386 decoded form, because it is most often used to construct To: headers
4387 lines in autoreplies, and the decoded form may well be syntactically
4388 invalid. However, $reply_address has leading white space removed, and all
4389 newlines turned into spaces so that the autoreply transport does not
4392 PH/05 If group was specified without a user on a router, and no group or user
4393 was specified on a transport, the group from the router was ignored.
4395 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4396 for visible compile-time settings that can be used to change these
4397 numbers, for those that want even more. Backwards compatibility with old
4398 spool files has been maintained. However, going back to a previous Exim
4399 release will lost any variables that are in spool files.
4401 PH/07 Two small changes when running in the test harness: increase delay when
4402 passing a TCP/IP connection to a new process, in case the original
4403 process has to generate a bounce, and remove special handling of
4404 127.0.0.2 (sic), which is no longer necessary.
4406 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4407 be the same on different OS.
4409 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4412 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4413 whether --show-vars was specified or not
4415 JJ/02 exipick: Added support for new ACL variable spool format introduced
4418 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4419 syntactically invalid From: or Reply-to: line, and a filter used this to
4420 generate an autoreply, and therefore failed to obtain an address for the
4421 autoreply, Exim could try to deliver to a non-existent relative file
4422 name, causing unrelated and misleading errors. What now happens is that
4423 it logs this as a hard delivery error, but does not attempt to create a
4426 PH/11 The exinext utility has a -C option for testing purposes, but although
4427 the given file was scanned by exinext itself; it wasn't being passed on
4428 when Exim was called.
4430 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4431 an end-of-file indication when reading a command response.
4433 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4434 compiled. In many other places in Exim, IPv6 addresses are always
4435 recognized, so I have changed this. It also means that IPv4 domain
4436 literals of the form [IPV4:n.n.n.n] are now always recognized.
4438 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4439 used if the router is not running as root, for example, when verifying at
4440 ACL time, or when using -bh. The debugging output from this situation was
4441 non-existent - all you got was a failure to exec. I have made two
4444 (a) Failures to set uid/gid, the current directory, or a process leader
4445 in a subprocess such as that created by queryprogram now generate
4446 suitable debugging output when -d is set.
4448 (b) The queryprogram router detects when it is not running as root,
4449 outputs suitable debugging information if -d is set, and then runs
4450 the subprocess without attempting to change uid/gid.
4452 PH/15 Minor change to Makefile for building test_host (undocumented testing
4455 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4456 additional section of a DNS packet that returns MX or SRV records.
4457 Instead, it always explicitly searches for A/AAAA records. This avoids
4458 major problems that occur when a DNS server includes only records of one
4459 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4460 fixed another bug: if SRV records were looked up and the corresponding
4461 address records were *not* found in the additional section, the port
4462 values from the SRV records were lost.
4464 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4465 using the correct key (the original address) when searching the retry
4466 rules in order to find which one to use for generating the retry hint.
4468 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4469 adding the default one. Similarly, if it contains a Reply-To: header, the
4470 errors_reply_to option, if set, is not used.
4472 PH/19 When calculating a retry time, Exim used to measure the "time since
4473 failure" by looking at the "first failed" field in the retry record. Now
4474 it does not use this if it is later than than the arrival time of the
4475 message. Instead it uses the arrival time. This makes for better
4476 behaviour in cases where some deliveries succeed, thus re-setting the
4477 "first failed" field. An example is a quota failure for a huge message
4478 when small messages continue to be delivered. Without this change, the
4479 "time since failure" will always be short, possible causing more frequent
4480 delivery attempts for the huge message than are intended.
4481 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4483 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4484 $1, $2, $3) because the numerical variables can be reset during some
4485 expansion items (e.g. "match"), thereby losing the authentication data.
4487 PH/21 Make -bV show the size of off_t variables so that the test suite can
4488 decide whether to run tests for quotas > 2G.
4490 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4491 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4492 filecount value is greater than 2G or if a quota value is greater than 2G
4493 on a system where the size of off_t is not greater than 4, a panic error
4496 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4497 never match. The debug and -bh output now contains an explicit error
4498 message indicating a malformed IPv4 address or mask.
4500 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4501 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4502 PH/23 above applies.
4504 PH/25 Do not write to syslog when running in the test harness. The only
4505 occasion when this arises is a failure to open the main or panic logs
4506 (for which there is an explicit test).
4508 PH/26 Added the /no_tell option to "control=freeze".
4510 PH/27 If a host name lookup failed very early in a connection, for example, if
4511 the IP address matched host_lookup and the reverse lookup yielded a name
4512 that did not have a forward lookup, an error message of the form "no IP
4513 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4514 could be logged. Now it outputs the IP address instead of "NULL".
4516 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4517 allows the sender and the authenticated sender to be set when
4518 submitting a message from within Exim. Since child_open_exim() is
4519 documented for local_scan(), the new function should be too.
4521 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4522 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4523 results in an empty string is now treated as unset.
4525 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4527 PH/31 Added sender_verify_fail logging option.
4529 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4530 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4531 tidied the source and removed it altogether.
4533 PH/33 When a queue run was abandoned because the load average was too high, a
4534 log line was always written; now it is written only if the queue_run log
4535 selector is set. In addition, the log line for abandonment now contains
4536 information about the queue run such as the pid. This is always present
4537 in "start" and "stop" lines but was omitted from the "abandon" line.
4539 PH/34 Omit spaces between a header name and the colon in the error message that
4540 is given when verify = headers_syntax fails (if there are lots of them,
4541 the message gets confusing).
4543 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4544 names, as there are now some PTR records that contain slashes. This check
4545 is only to protect against broken name servers that fall over on strange
4546 characters, so the fact that it applies to all lookups doesn't matter.
4548 PH/36 Now that the new test suite is complete, we can remove some of the
4549 special code in Exim that was needed for the old test suite. For example,
4550 sorting DNS records because real resolvers return them in an arbitrary
4551 order. The new test suite's fake resolver always returns records in the
4554 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4555 bounces) except when queue_only is set, to avoid logging races between
4556 the different processes.
4558 PH/38 Panic-die if .include specifies a non-absolute path.
4560 PH/39 A tweak to the "H" retry rule from its user.
4562 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4563 a label. They prevented compilation on older perls.
4565 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4566 a warning to be raised on newish perls.
4568 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4569 on queue. Changes to match documented behaviour of showing count of
4570 messages matching specified criteria.
4572 PH/40 Changed the default ident timeout from 30s to 5s.
4574 PH/41 Added support for the use of login_cap features, on those BSD systems
4575 that have them, for controlling the resources used by pipe deliveries.
4577 PH/42 The content-scanning code uses fopen() to create files in which to put
4578 message data. Previously it was not paying any attention to the mode of
4579 the files. Exim runs with umask(0) because the rest of the code creates
4580 files with open(), and sets the required mode explicitly. Thus, these
4581 files were ending up world-writeable. This was not a big issue, because,
4582 being within the spool directory, they were not world-accessible. I have
4583 created a function called modefopen, which takes an additional mode
4584 argument. It sets umask(777), creates the file, chmods it to the required
4585 mode, then resets the umask. All the relevant calls to fopen() in the
4586 content scanning code have been changed to use this function.
4588 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4589 to 24 hours. This avoids potential overflow problems when processing G
4590 and H retry rules. I suspect nobody ever tinkers with this value.
4592 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4594 PH/45 When the plaintext authenticator is running as a client, the server's
4595 challenges are checked to ensure they are valid base64 strings. By
4596 default, the authentication attempt is cancelled if an invalid string is
4597 received. Setting client_ignore_invalid_base64 true ignores these errors.
4598 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4599 they are received. Thus, the responses can be made to depend on the
4600 challenges. If an invalid string is ignored, an empty string is placed in
4603 PH/46 Messages that are created by the autoreply transport now contains a
4604 References: header, in accordance with RFCs 2822 and 3834.
4606 PH/47 Added authenticated_sender_force to the smtp transport.
4608 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4610 PH/49 Installed latest patch from the Sieve maintainer.
4612 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4613 was also set, the appendfile transport was unnecessarily scanning a
4614 directory of message files (e.g. for maildir delivery) to find the count
4615 of files (along with the size), even though it did not need this
4616 information. It now does the scan only if it needs to find either the
4617 size of the count of files.
4619 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4621 PH/52 Two bugs concerned with error handling when the smtp transport is
4624 (i) Exim was not creating retry information for temporary errors given
4625 for individual recipients after the DATA command when the smtp transport
4626 was used in LMTP mode. This meant that they could be retried too
4627 frequently, and not timed out correctly.
4629 (ii) Exim was setting the flag that allows error details to be returned
4630 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4631 recipients that were returned after the DATA command.
4633 PH/53 This is related to PH/52, but is more general: for any failing address,
4634 when detailed error information was permitted to be returned to the
4635 sender, but the error was temporary, then after the final timeout, only
4636 "retry timeout exceeded" was returned. Now it returns the full error as
4637 well as "retry timeout exceeded".
4639 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4640 do this, and (what is worse) MTAs that accept it.
4642 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4643 will now be deprecated.
4645 PH/56 New os.c-cygwin from the Cygwin maintainer.
4647 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4648 formats (previously only available in exim formats via -bpr, -bpru,
4649 and -bpra. Now also available in native and exiqgrep formats)
4651 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4652 with very large, slow to parse queues
4654 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4656 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4658 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4659 responses to authentication challenges, though it was showing the
4660 challenges; (ii) I've removed the CR characters from the debug output for
4663 PH/58 Allow for the insertion of a newline as well as a space when a string
4664 is turned into more than one encoded-word during RFC 2047 encoding. The
4665 Sieve code now uses this.
4667 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4668 data_4xx, lost_connection, tls_required.
4670 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4671 message was being sent as an SMTP response.
4673 PH/61 Add -l and -k options to exicyclog.
4675 PH/62 When verifying, if an address was redirected to one new address, so that
4676 verification continued, and the new address failed or deferred after
4677 having set something in $address_data, the value of $address_data was not
4678 passed back to the ACL. This was different to the case when no
4679 redirection occurred. The value is now passed back in both cases.
4681 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4682 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4683 use login_cap.h, so on its own it isn't the distinguishing feature. The
4684 new name refers directly to the setclassresources() function.
4686 PH/65 Added configuration files for NetBSD3.
4688 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4690 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4691 is preferred over IPv4.
4693 PH/68 The bounce_return_message and bounce_return_body options were not being
4694 honoured for bounces generated during the reception of non-SMTP messages.
4695 In particular, this applied to messages rejected by the ACL. This bug has
4696 been fixed. However, if bounce_return_message is true and bounce_return_
4697 body is false, the headers that are returned for a non-SMTP message
4698 include only those that have been read before the error was detected.
4699 (In the case of an ACL rejection, they have all been read.)
4701 PH/69 The HTML version of the specification is now built in a directory called
4702 spec_html instead of spec.html, because the latter looks like a path with
4703 a MIME-type, and this confuses some software.
4705 PH/70 Catch two compiler warnings in sieve.c.
4707 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4708 function verify_get_ident() calls ip_connect() to connect a socket, but
4709 if the "connect()" function timed out, ip_connect() used to close the
4710 socket. However, verify_get_ident() also closes the socket later, and in
4711 between Exim writes to the log, which may get opened at this point. When
4712 the socket was closed in ip_connect(), the log could get the same file
4713 descriptor number as the socket. This naturally causes chaos. The fix is
4714 not to close the socket in ip_connect(); the socket should be closed by
4715 the function that creates it. There was only one place in the code where
4716 this was missing, in the iplookup router, which I don't think anybody now
4717 uses, but I've fixed it anyway.
4719 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4720 well as to direct DNS lookups. Otherwise the handling of names in host
4721 lists is inconsistent and therefore confusing.
4727 PH/01 Two changes to the default runtime configuration:
4729 (1) Move the checks for relay_from_hosts and authenticated clients from
4730 after to before the (commented out) DNS black list checks.
4732 (2) Add control=submission to the relay_from_hosts and authenticated
4733 clients checks, on the grounds that messages accepted by these
4734 statements are most likely to be submissions.
4736 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4738 (1) Generate an error if the third argument for the ${prvs expansion is
4741 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4744 (3) Reset the variables that are obtained from the first argument of
4745 ${prvscheck and used in the second argument before leaving the code,
4746 because their memory is reclaimed, so using them afterwards may do
4749 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4750 one (it's much easier than Tom thought :-).
4752 (5) Because of (4), we can now allow for the use of $prvscheck_result
4753 inside the third argument.
4755 PH/03 For some reason, the default setting of PATH when running a command from
4756 a pipe transport was just "/usr/bin". I have changed it to
4759 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4760 anything to be listed in the output from -bV.
4762 PH/05 When a filter generated an autoreply, the entire To: header line was
4763 quoted in the delivery log line, like this:
4765 => >A.N.Other <ano@some.domain> <original@ddress> ...
4767 This has been changed so that it extracts the operative address. There
4768 may be more than one such address. If so, they are comma-separated, like
4771 => >ano@some.domain,ona@other.domain <original@ddress> ...
4773 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4774 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4775 not being looked up in the rDNS to get a host name, Exim was showing the
4776 IP address twice in Received: lines, even though the IP addresses were
4777 identical. For example:
4779 Received: from [1.2.3.4] (helo=[1.2.3.4])
4781 However, if the real host name was known, it was omitting the HELO data
4782 if it matched the actual IP address. This has been tidied up so that it
4783 doesn't show the same IP address twice.
4785 PH/07 When both +timestamp and +memory debugging was on, the value given by
4786 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4787 called by the debug printing, thereby overwriting the timestamp buffer.
4788 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4790 PH/08 When the original message was included in an autoreply transport, it
4791 always said "this is a copy of the message, including all the headers",
4792 even if body_only or headers_only was set. It now gives an appropriate
4795 PH/09 Applied a patch from the Sieve maintainer which:
4797 o fixes some comments
4798 o adds the (disabled) notify extension core
4799 o adds some debug output for the result of if/elsif tests
4800 o points to the current vacation draft in the documentation
4801 and documents the missing references header update
4805 o fixes a bug in processing the envelope test (when testing
4806 multiple envelope elements, the last element determined the
4809 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4810 Electronic Mail") by including:
4812 Auto-submitted: auto-generated
4814 in the messages that it generates (bounce messages and others, such as
4815 warnings). In the case of bounce messages for non-SMTP messages, there was
4816 also a typo: it was using "Auto_submitted" (underscore instead of
4817 hyphen). Since every message generated by Exim is necessarily in response
4818 to another message, thes have all been changed to:
4820 Auto-Submitted: auto-replied
4822 in accordance with these statements in the RFC:
4824 The auto-replied keyword:
4826 - SHOULD be used on messages sent in direct response to another
4827 message by an automatic process,
4829 - MUST NOT be used on manually-generated messages,
4831 - MAY be used on Delivery Status Notifications (DSNs) and Message
4832 Disposition Notifications (MDNs),
4834 - MUST NOT be used on messages generated by automatic or periodic
4835 processes, except for messages which are automatic responses to
4838 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4839 to the default Received: header definition.
4841 PH/12 Added log selector acl_warn_skipped (default on).
4843 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4844 variables because (a) they are in the wrong storage pool and (b) even if
4845 they were copied, it wouldn't work properly because of the caching.
4847 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4848 checking when decoding. Apparently there are clients that generate
4849 overlong encoded strings. Why am I not surprised?
4851 PH/15 If the first argument of "${if match_address" was not empty, but did not
4852 contain an "@" character, Exim crashed. Now it writes a panic log message
4853 and treats the condition as false.
4855 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4857 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4858 extension "envelope-auth". The code is finished and in agreement with
4859 other implementations, but there is no documentation so far and in fact,
4860 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4861 not changing the active code.
4863 Print executed "if" and "elsif" statements when debugging is used. This
4864 helps a great deal to understand what a filter does.
4866 Document more things not specified clearly in RFC3028. I had all this
4867 sorted out, when out of a sudden new issues came to my mind. Oops."
4869 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4872 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4873 canonical form (as documented). However, after a host name lookup from
4874 the IP address, check_host() was doing a simple string comparison with
4875 addresses acquired from the DNS when checking that the found name did
4876 have the original IP as one of its addresses. Since any found IPv6
4877 addresses are likely to be in abbreviated form, the comparison could
4878 fail. Luckily, there already exists a function for doing the comparison
4879 by converting both addresses to binary, so now that is used instead of
4880 the text comparison.
4882 PH/20 There was another similar case to PH/19, when a complete host name was
4883 given in a host list; looking up its IP address could give an abbreviated
4884 form, whereas the current host's name might or might not be abbreviated.
4885 The same fix has been applied.
4891 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4892 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4895 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4896 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4898 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4900 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4901 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4902 Also, for "Auto-Submitted", treat anything other than "no" as
4903 non-personal, in accordance with RFC 3834. (Previously it treated
4904 anything starting "auto-" as non-personal.)
4906 TF/01 The control=submission/name=... option had a problem with syntax
4907 errors if the name included a slash character. The /name= option
4908 now slurps the rest of the string, so it can include any characters
4909 but it must come last in the list of options (after /sender_retain
4912 PH/05 Some modifications to the interface to the fake nameserver for the new
4920 TK/01 Added the "success_on_redirect" address verification option. See
4921 NewStuff for rationale and an example.
4923 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4925 PH/02 Patch to exigrep to allow it to work on syslog lines.
4927 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4928 fread() to skip over the body file's header line, because in Cygwin the
4929 header line is locked and is inaccessible.
4931 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4932 co-exist for some time) to make it clear that it is the Exim ID that is
4933 referenced, not the Message-ID: header line.
4935 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4936 string_format() function, because snprintf() does not exist on all
4939 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4940 ${stat: expansion item.
4942 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4943 protocol synchronization error", to keep the pedants happy.
4945 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4946 well as for IRIX systems, when gcc is being used. See the host.c source
4949 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4951 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4954 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4955 transport and to the smtp transport in LMTP mode.
4957 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4959 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4960 run a filter in a subprocess. This could lead to confusion in subsequent
4961 lookups in the parent process. There should also be a search_tidyup() at
4962 the end of the subprocess.
4964 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4965 only if the host matched helo_try_verify_hosts, which caused the
4966 verification to occur when the EHLO/HELO command was issued. The ACL just
4967 tested the remembered result. Now, if a previous verification attempt has
4968 not happened, "verify = helo" does it there and then.
4970 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4972 TK/03 Fix log output including CR from clamd.
4974 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4975 exist provoked a memory error which could cause a segfault.
4977 PH/15 Installed PCRE 6.2
4979 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4981 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4982 of the problem. Specifically, suggested +O2 rather than +O1 for the
4985 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4987 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4988 record, the port was not correctly logged when the outgoing_port log
4989 selector was set (it logged the transort's default port).
4991 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4992 fallback_hosts, and "hosts" in the smtp transport.
4994 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4995 host errors such as "Connection refused".
4997 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4998 authentication with radiusclient 0.4.9:
5000 - Error returned from rc_read_config was caught wrongly
5001 - Username/password not passed on to radius server due to wrong length.
5003 The presumption is that some radiusclient API changes for 4.51/PH/17
5004 were not taken care of correctly. The code is still untested by me (my
5005 Linux distribution still has 0.3.2 of radiusclient), but it was
5006 contributed by a Radius user.
5008 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5009 expanding the "port" option of the smtp transport.
5011 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5012 while reading a MIME header. Thanks to Tom Hughes for a patch.
5014 PH/24 Include config.h inside local_scan.h so that configuration settings are
5017 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5018 that in an ACL for RCPT (for example), you can examine exactly what was
5021 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5022 commands, but it was not correctly comparing the address with the actual
5023 client host address. Thus, it would show the EHLO address in Received:
5024 header lines when this was not necessary.
5026 PH/27 Added the % operator to ${eval:}.
5028 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5029 it should be ignoring failures (because with -C, for example, it has lost
5030 privilege). It wasn't ignoring creation failures other than "already
5033 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5036 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5037 because an input line was too long, either on its own, or by virtue of
5038 too many continuations, the temporary file was not being removed, and the
5039 return code was incorrect.
5041 PH/31 Missing "BOOL" in function definition in filtertest.c.
5043 PH/32 Applied Sieve patches from the maintainer.
5045 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5047 PH/33 Added "verify = not_blind".
5049 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5050 Local/Makefile (with some defaults set). These are used in built scripts
5051 such as exicyclog, but they have never been used in the exim_install
5052 script (though there are many overriding facilities there). I have
5053 arranged that the exim_install script now takes note of these two
5056 PH/35 Installed configuration files for Dragonfly.
5058 PH/36 When a locally submitted message by a trusted user did not contain a
5059 From: header, and the sender address was obtained from -f or from an SMTP
5060 MAIL command, and the trusted user did not use -F to supply a sender
5061 name, $originator_name was incorrectly used when constructing a From:
5062 header. Furthermore, $originator_name was used for submission mode
5063 messages from external hosts without From: headers in a similar way,
5064 which is clearly wrong.
5066 PH/37 Added control=suppress_local_fixups.
5068 PH/38 When log_selector = +received_sender was set, and the addition of the
5069 sender made the log line's construction buffer exactly full, or one byte
5070 less than full, an overflow happened when the terminating "\n" was
5073 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5074 when the result of a list match is failure because a DNS lookup failed.
5076 PH/40 RM_COMMAND is now used in the building process.
5078 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5079 the "build-* directories that it finds.
5081 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5082 address in a domain literal was a prefix of an interface address.
5084 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5085 when verifying a sender address, unless rewrite_headers is false.
5087 PH/44 Wrote a long comment about why errors_to addresses are verified as
5088 recipients, not senders.
5090 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5091 the ratelimit ACL was added.
5093 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5095 PH/46 Added extra information about PostgreSQL errors to the error string.
5097 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5098 avoiding the need to install special zones in a real server. This is
5099 backwards compatible; if it can't find the fake resolver, it drops back.
5100 Thus, both old and new test suites can be run.
5102 TF/02 Added util/ratelimit.pl
5104 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5105 clock is set back in time.
5107 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5108 Candler <B.Candler@pobox.com>.
5110 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5111 OK for addresses that are the result of redirections.
5113 PH/48 A number of further additions for the benefit of the new test suite,
5114 including a fake gethostbyname() that interfaces to the fake DNS resolver
5117 TF/06 The fix for widen_domains has also been applied to qualify_single and
5118 search_parents which are the other dnslookup options that can cause
5121 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5124 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5126 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5127 service" if it encountered an MX record with an empty target hostname.
5128 The message is now "an MX or SRV record indicated no SMTP service".
5130 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5131 if the DNS of the sending site is misconfigured. This is quite a
5132 common situation. This change restores the behaviour of treating a
5133 helo verification defer as a failure.
5135 PH/51 If self=fail was set on a router, the bounce message did not include the
5136 actual error message.
5142 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5144 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5145 command itself ended in error, the underlying message about the transport
5146 filter timeout was being overwritten with the pipe command error. Now the
5147 underlying error message should be appended to the second error message.
5149 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5151 PH/02 Reduce the amount of output that "make" produces by default. Full output
5152 can still be requested.
5154 PH/03 The warning log line about a condition test deferring for a "warn" verb
5155 was being output only once per connection, rather than after each
5156 occurrence (because it was using the same function as for successful
5157 "warn" verbs). This seems wrong, so I have changed it.
5159 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5160 it should not have, which might have caused a crash in the right
5161 circumstances, but probably never did.
5163 PH/04 Installed a modified version of Tony Finch's patch to make submission
5164 mode fix the return path as well as the Sender: header line, and to
5165 add a /name= option so that you can make the user's friendly name appear
5168 TF/03 Added the control = fakedefer ACL modifier.
5170 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5171 Mark Lowes for thorough testing.
5173 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5175 TK/03 Merged latest SRS patch from Miles Wilton.
5177 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5178 with the definition in sysexits.h (which is #included earlier).
5179 Fortunately, Exim does not actually use EX_OK. The code used to try to
5180 preserve the sysexits.h value, by assuming that macro definitions were
5181 scanned for macro replacements. I have been disabused of this notion,
5182 so now the code just undefines EX_OK before #including unistd.h.
5184 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5185 in the smtp transport. When a block could not be written in a single
5186 write() function, the timeout was being re-applied to each part-write.
5187 This seems wrong - if the receiver was accepting one byte at a time it
5188 would take for ever. The timeout is now adjusted when this happens. It
5189 doesn't have to be particularly precise.
5191 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5192 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5194 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5195 without a domain if the check to <postmaster@domain> fails.
5197 SC/01 Eximstats: added -xls and the ability to specify output files
5198 (patch written by Frank Heydlauf).
5200 SC/02 Eximstats: use FileHandles for outputting results.
5202 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5204 SC/04 Eximstats: fixed display of large numbers with -nvr option
5206 SC/05 Eximstats: fixed merging of reports with empty tables.
5208 SC/06 Eximstats: added the -include_original_destination flag
5210 SC/07 Eximstats: removed tabs and trailing whitespace.
5212 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5214 TK/06 MBOX spool code: Add real "From " MBOX separator line
5215 so the .eml file is really in mbox format (even though
5216 most programs do not really care). Patch from Alex Miller.
5218 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5219 The latter is generated from $received_to and is only set if the
5220 message has one envelope recipient. SA can use these headers,
5221 obviously out-of-the-box. Patch from Alex Miller.
5223 PH/08 The ${def test on a variable was returning false if the variable's
5224 value was "0", contrary to what the specification has always said!
5225 The result should be true unless the variable is empty.
5227 PH/09 The syntax error of a character other than { following "${if
5228 def:variable_name" (after optional whitespace) was not being diagnosed.
5229 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5230 accidental colon was present, for example, could give incorrect results.
5232 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5233 result is used (not including appendfile, where other changes are about
5236 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5237 This involved changing a lot of size variables from int to off_t. It
5238 should work with maildirs and everything.
5240 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5241 spamd dying while we are connected to it.
5243 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5246 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5247 function for BDB 4.3.
5249 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5251 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5252 the sources for PCRE have been re-arranged and more files are now
5255 PH/15 The code I had for printing potentially long long variables in PH/11
5256 above was not the best (it lost precision). The length of off_t variables
5257 is now inspected at build time, and an appropriate printing format (%ld
5258 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5259 to be "long long int" or "long int". This is needed for the internal
5260 formatting function string_vformat().
5262 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5263 the configuration file to be ":syslog", then the script "guesses" where
5264 the logs files are, rather than using the compiled in default. In our
5265 case the guess is not the same as the compiled default, so the script
5266 suddenly stopped working when I started to use syslog. The patch checks
5267 to see if log_file_path is "". If so, it attempts to read it from exim
5268 with no configuration file to get the compiled in version, before it
5269 falls back to the previous guessing code."
5271 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5272 implementing BATV in an Exim configuration. See NewStuff for the gory
5275 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5276 Makefile that are specific to HP-UX.
5278 PH/18 If the "use_postmaster" option was set for a recipient callout together
5279 with the "random" option, the postmaster address was used as the MAIL
5280 FROM address for the random test, but not for the subsequent recipient
5281 test. It is now used for both.
5283 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5284 patch removes a few documentation additions to RFC 3028, because the
5285 latest draft now contains them. It adds the new en;ascii-case comparator
5286 and a new error check for 8bit text in MIME parts. Comparator and
5287 require names are now matched exactly. I enabled the subaddress
5288 extension, but it is not well tested yet (read: it works for me)."
5290 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5291 rework some of the code of TK/09 above to avoid the hardwired use of
5292 "%lld" and "long long". Replaced the call to snprintf() with a call to
5295 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5296 records point to non-existent hosts", "retry timeout exceeded", and
5297 "retry time not reached for any host after a long failure period".
5299 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5300 experimental DomainKeys support:
5302 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5303 (2) On an error such as an illegally used "control", the wrong name for
5304 the control was given.
5306 These problems did NOT occur unless DomainKeys support was compiled.
5308 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5310 PH/24 Added ${if match_ip condition.
5312 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5313 databases so that it will be absolutely obvious if a crash occurs in the
5314 DB library. This is a regular occurrence (often caused by mis-matched
5317 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5318 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5319 picked up on a user's system that detects such things. There doesn't seem
5320 to be a gcc warning option for this - only an attribute that has to be
5321 put on the function's prototype. It seems that in Fedora Core 4 they have
5322 set this on a number of new functions. No doubt there will be more in due
5325 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5326 specify a transport. However, if an address that was verified by such a
5327 router was the subject of a callout, Exim crashed because it tried to
5328 read the rcpt_include_affixes from the non-existent transport. Now it
5329 just assumes that the setting of that option is false. This bug was
5330 introduced by 4.51/PH/31.
5332 PH/28 Changed -d+all to exclude +memory, because that information is very
5333 rarely of interest, but it makes the output a lot bigger. People tend to
5334 do -d+all out of habit.
5336 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5337 code in os-type was giving problems when libc.so lives in lib64, like on
5340 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5341 aren't the modern standard, and it seems that some systems' include files
5342 don't always have them. Exim was already checking for some of the newer
5343 ones like T_AAAA, and defining it itself. I've added checks for all the
5344 record types that Exim uses.
5346 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5347 not automatically generating a new one, as it is supposed to. This
5348 prevented TLS from working. If the file did exist, but contained invalid
5349 data, a new version was generated, as expected. It was only the case of a
5350 non-existent file that was broken.
5352 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5353 with a change in libdomainkeys > 0.64.
5355 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5356 from DNS. If the selector record carries the flag, it now has
5357 precedence over the domain-wide flag.
5359 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5361 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5362 the use of a port name that isn't defined in /etc/services) occurred, the
5363 message was deferred as in a normal delivery, and thus remained on the
5364 spool, instead of being failed because of the mua_wrapper setting. This
5365 is now fixed, and I tidied up some of the mua_wrapper messages at the
5368 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5369 the messages in a hash of arrays rather than using individual hashes.
5370 This is a bit cleaner and results in dramatic memory savings, albeit
5371 at a slight CPU cost.
5373 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5374 as requested by Marc Sherman.
5376 SC/10 Eximstats: added histograms for user specified patterns as requested
5379 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5381 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5382 fopen() in the content-scanning modules that did not already have it.
5388 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5389 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5391 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5393 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5395 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5396 to test Sieve filters that use "vacation".
5398 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5399 that changes the way the GnuTLS parameters are stored in the cache file.
5400 The new format can be generated externally. For backward compatibility,
5401 if the data in the cache doesn't make sense, Exim assumes it has read an
5402 old-format file, and it generates new data and writes a new file. This
5403 means that you can't go back to an older release without removing the
5406 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5407 work if there are any delivery delays because "one_time" forces the
5408 parent to be marked "delivered", so its unseen clone is never tried
5409 again. For this reason, Exim now forbids the simultaneous setting of
5412 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5413 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5414 entry if you want to know the details. The fix, however, neglected to
5415 consider the case when local delivery batching is involved. The test for
5416 "previously delivered" was not happening when checking to see if an
5417 address could be batched with a previous (undelivered) one; under
5418 certain circumstances this could lead to multiple deliveries to the same
5421 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5422 in its include files, and this causes problems building Exim.
5424 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5425 header_syntax) but Exim was just ignoring anything given after a slash.
5426 In particular, this caused confusion with an attempt to use "verify =
5427 reverse_host_lookup/defer_ok". An error is now given when options are
5428 supplied for verify items that do not have them. (Maybe reverse_host_
5429 lookup should have a defer_ok option, but that's a different point.)
5431 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5432 defined by RFC 821) to 2048, because there were problems with some AUTH
5433 commands, and RFC 1869 says the size should be increased for extended
5434 SMTP commands that take arguments.
5436 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5439 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5440 "unknown" error; now it says that the functionality isn't in the binary.
5442 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5443 an address' error message when a string expansion fails (syntax or
5444 whatever). Otherwise the password may appear in the log. Following change
5445 PH/42 below, there is no longer a chance of it appearing in a bounce
5448 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5450 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5451 of its addresses was ever tried. (Bugzilla bug #2.)
5453 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5454 the result incorrectly in the debug output. (It correctly added a newline
5455 to what was transported.)
5457 TF/01 Added $received_time.
5459 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5460 commented out examples of how to interface to a virus scanner and to
5461 SpamAssassin. Also added commented examples of av_scanner and
5462 spamd_address settings.
5464 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5465 and controls are allowed in which ACLs. There were a couple of minor
5466 errors. Some of the entries in the conditions table (which is a table of
5467 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5468 negation of where the condition IS allowed.
5470 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5472 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5473 header file does not have a version number, so I've had to invent a new
5474 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5475 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5476 radiusclient), but it was contributed by a Radius user.
5478 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5479 files or directories, for OpenSSL.
5481 PH/19 When an Exim process that is running as root has to create an Exim log
5482 file, it does so in a subprocess that runs as exim:exim so as to get the
5483 ownership right at creation (otherwise, other Exim processes might see
5484 the file with the wrong ownership). There was no test for failure of this
5485 fork() call, which would lead to the process getting stuck as it waited
5486 for a non-existent subprocess. Forks do occasionally fail when resources
5487 run out. I reviewed all the other calls to fork(); they all seem to check
5490 PH/20 When checking for unexpected SMTP input at connect time (before writing
5491 the banner), Exim was not dealing correctly with a non-positive return
5492 from the read() function. If the client had disconnected by this time,
5493 the result was a log entry for a synchronization error with an empty
5494 string after "input=" when read() returned zero. If read() returned -1
5495 (an event I could not check), uninitialized data bytes were printed.
5496 There were reports of junk text (parts of files, etc) appearing after
5499 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5501 PH/22 Added support for macro redefinition, and (re)definition in between
5502 driver and ACL definitions.
5504 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5505 forgetting to use the resulting value; it was using the unexpanded value.
5507 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5508 hadn't been configured. The fix is from Juergen Kreileder, who
5509 understands it better than I do:
5511 "Here's what I see happening with three configured cyrus_sasl
5512 authenticators configured (plain, login, cram-md5):
5514 On startup auth_cyrus_sasl_init() gets called for each of these.
5515 This means three calls to sasl_listmech() without a specified mech_list.
5516 => SASL tests which mechs of all available mechs actually work
5517 => three warnings about OTP not working
5518 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5520 With the patch, sasl_listmech() also gets called three times. But now
5521 SASL's mech_list option is set to the server_mech specified in the the
5522 authenticator. Or in other words, the answer from sasl_listmech()
5523 gets limited to just the mech you're testing for (which is different
5525 => the return list contains just 'plain' or 'login', 'cram-md5' or
5526 nothing depending on the value of ob->server_mech.
5528 I've just tested the patch: Authentication still works fine,
5529 unavailable mechs specified in the exim configuration are still
5530 caught, and the auth.log warnings about OTP are gone."
5532 PH/25 When debugging is enabled, the contents of the command line are added
5533 to the debugging output, even when log_selector=+arguments is not
5536 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5537 answer is "GNU", and only if the return is "GNU/something" is the answer
5540 PH/27 $acl_verify_message is now set immediately after the failure of a
5541 verification in an ACL, and so is available in subsequent modifiers. In
5542 particular, the message can be preserved by coding like this:
5544 warn !verify = sender
5545 set acl_m0 = $acl_verify_message
5547 Previously, $acl_verify_message was set only while expanding "message"
5548 and "log_message" when a very denied access.
5550 PH/28 Modified OS/os.c-Linux with
5552 -#ifndef OS_LOAD_AVERAGE
5553 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5555 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5556 nomenclature these days.)
5558 PH/29 Installed patch from the Sieve maintainer that adds the options
5559 sieve_useraddress and sieve_subaddress to the redirect router.
5561 PH/30 In these circumstances:
5562 . Two addresses routed to the same list of hosts;
5563 . First host does not offer TLS;
5564 . First host accepts first address;
5565 . First host gives temporary error to second address;
5566 . Second host offers TLS and a TLS session is established;
5567 . Second host accepts second address.
5568 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5569 and peerdn, if requested) that were in fact used only for the second
5572 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5573 attention to any local part prefix or suffix that was matched by the
5574 router that accepted the address. It now behaves in the same way as it
5575 does for delivery: the affixes are removed from the local part unless
5576 rcpt_include_affixes is set on the transport.
5578 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5579 timeout during the DATA phase of an incoming message.
5581 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5582 applied a patch sanctioned by the Sieve maintainer.
5584 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5585 the uid or gid is negative. A case of a negative gid caused this to be
5586 noticed. The fix allows for either to be negative.
5588 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5589 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5592 PH/36 The change PH/12 above was broken. Fixed it.
5594 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5595 the grounds that routing the same address twice would always produce the
5596 same answer. This might have been true once, but it is certainly no
5597 longer true now. Routing a child address may depend on the previous
5598 routing that produced that child. Some complicated redirection strategies
5599 went wrong when messages had multiple recipients, and made Exim's
5600 behaviour dependent on the order in which the addresses were given.
5602 I have moved the duplicate checking until after the routing is complete.
5603 Exim scans the addresses that are assigned to local and remote
5604 transports, and removes any duplicates. This means that more work will be
5605 done, as duplicates will always all be routed, but duplicates are
5606 presumably rare, so I don't expect this is of any significance.
5608 For deliveries to pipes, files, and autoreplies, the duplicate checking
5609 still happens during the routing process, since they are not going to be
5612 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5613 It corrects a timeout issue with spamd. This is Ian's comment: "The
5614 background is that sometimes spamd either never reads data from a
5615 connection it has accepted, or it never writes response data. The exiscan
5616 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5617 blindly assumes that writes won't block so it may never time out."
5619 PH/39 Allow G after quota size as well as K and M.
5621 PH/40 The value set for $authenticated_id in an authenticator may not contain
5622 binary zeroes or newlines because the value is written to log lines and
5623 to spool files. There was no check on this. Now the value is run through
5624 the string_printing() function so that such characters are converted to
5625 printable escape sequences.
5627 PH/41 $message_linecount is a new variable that contains the total number of
5628 lines in the message. Compare $body_linecount, which is the count for the
5631 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5632 bounce and delay warning messages, except in certain special cases, which
5635 (a) An SMTP error message from a remote host;
5636 (b) A message specified in a :fail: redirection;
5637 (c) A message specified in a "fail" command in a system filter;
5638 (d) A message specified in a FAIL return from the queryprogram router;
5639 (e) A message specified by the cannot_route_message router option.
5641 In these cases only, Exim does include the error details in bounce and
5642 warning messages. There are also a few cases where bland messages such
5643 as "unrouteable address" or "local delivery error" are given.
5645 PH/43 $value is now also set for the "else" part of a ${run expansion.
5647 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5648 being worked on, but at least Exim now implements the latest version to
5651 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5652 process to complete was treated as a delivery failure, a timeout while
5653 writing the message to the pipe was logged, but erroneously treated as a
5654 successful delivery. Such timeouts include transport filter timeouts. For
5655 consistency with the overall process timeout, these timeouts are now
5656 treated as errors, giving rise to delivery failures by default. However,
5657 there is now a new Boolean option for the pipe transport called
5658 timeout_defer, which, if set TRUE, converts the failures into defers for
5659 both kinds of timeout. A transport filter timeout is now identified in
5662 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5663 systems where "make" and "gmake" are different, calling "gmake" at top
5664 level broke things. I've arranged for the value of $(MAKE) to be passed
5665 from the Makefile to this script so that it can call the same version of
5669 A note about Exim versions 4.44 and 4.50
5670 ----------------------------------------
5672 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5673 changes of various kinds. As a consequence, a big documentation update was
5674 needed. This delayed the release for rather longer than seemed good, especially
5675 in the light of a couple of (minor) security issues. Therefore, the changes
5676 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5677 release. So 4.44 and 4.50 are in effect two different branches that both start
5680 I have left the 4.50 change log unchanged; it contains all the changes since
5681 4.43. The change log for 4.44 is below; many of its items are identical to
5682 those for 4.50. This seems to be the most sensible way to preserve the
5683 historical information.
5689 1. Minor wording change to the doc/README.SIEVE file.
5691 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5692 computation of the current number of files was incorrect.
5694 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5695 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5698 4. Give more explanation in the error message when the command for a transport
5699 filter fails to execute.
5701 5. There are several places where Exim runs a non-Exim command in a
5702 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5703 was being done only for the command run by the queryprogram router. It is
5704 now done for all such subprocesses. The other cases are: ${run, transport
5705 filters, and the commands run by the lmtp and pipe transports.
5707 6. Added CONFIGURE_GROUP build-time option.
5709 7. Some older OS have a limit of 256 on the maximum number of file
5710 descriptors. Exim was using setrlimit() to set 1000 as a large value
5711 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5712 systems. I've change it so that if it can't get 1000, it tries for 256.
5714 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5715 was an oversight, and furthermore, ever since the addition of extra
5716 controls (e.g. 4.43/32), the checks on when to allow different forms of
5717 "control" were broken. There should now be diagnostics for all cases when a
5718 control that does not make sense is encountered.
5720 9. Added the /retain_sender option to "control=submission".
5722 10. $recipients is now available in the predata ACL (oversight).
5724 11. Tidy the search cache before the fork to do a delivery from a message
5725 received from the command line. Otherwise the child will trigger a lookup
5726 failure and thereby defer the delivery if it tries to use (for example) a
5727 cached ldap connection that the parent has called unbind on.
5729 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5730 of $address_data from the recipient verification was clobbered by the
5731 sender verification.
5733 13. The value of address_data from a sender verification is now available in
5734 $sender_address_data in subsequent conditions in the ACL statement.
5736 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5738 15. Added a new option "connect=<time>" to callout options, to set a different
5741 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5742 was its contents. (It was OK if the option was not defined at all.)
5744 17. A "Completed" log line is now written for messages that are removed from
5745 the spool by the -Mrm option.
5747 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5748 information about exactly what failed.
5750 19. Added -dd to debug only the daemon process.
5752 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5753 handles timeouts, both on the server side and network timeouts. Renamed the
5754 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5756 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5757 It is now set to "smtps".
5759 22. $host_address is now set to the target address during the checking of
5760 ignore_target_hosts.
5762 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5763 being passed; this would have caused $sender_host_name to have been used if
5764 matching the list had actually called for a host name (not very likely,
5765 since this list is usually IP addresses). A host name is now passed as
5768 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5769 code that specifies a non-restarting handler (typically sigaction() in
5770 modern systems) in an attempt to fix a rare and obscure crash bug.
5772 25. Narrowed the window for a race in the daemon that could cause it to ignore
5773 SIGCHLD signals. This is not a major problem, because they are used only to
5774 wake it up if nothing else does.
5776 26. A malformed maildirsize file could cause Exim to calculate negative values
5777 for the mailbox size or file count. Odd effects could occur as a result.
5778 The maildirsize information is now recalculated if the size or filecount
5781 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5782 support for a long time. Removed HAVE_SYS_VFS_H.
5784 28. Installed the latest version of exipick from John Jetmore.
5786 29. In an address list, if the pattern was not a regular expression, an empty
5787 subject address (from a bounce message) matched only if the pattern was an
5788 empty string. Non-empty patterns were not even tested. This was the wrong
5789 because it is perfectly reasonable to use an empty address as part of a
5790 database query. An empty address is now tested by patterns that are
5791 lookups. However, all the other forms of pattern expect the subject to
5792 contain a local part and a domain, and therefore, for them, an empty
5793 address still always fails if the pattern is not itself empty.
5795 30. Exim went into a mad DNS loop when attempting to do a callout where the
5796 host was specified on an smtp transport, and looking it up yielded more
5797 than one IP address.
5799 31. Re-factored the code for checking spool and log partition space into a
5800 function that finds that data and another that does the check. The former
5801 is then used to implement four new variables: $spool_space, $log_space,
5802 $spool_inodes, and $log_inodes.
5804 32. The RFC2047 encoding function was originally intended for short strings
5805 such as real names; it was not keeping to the 75-character limit for
5806 encoded words that the RFC imposes. It now respects the limit, and
5807 generates multiple encoded words if necessary. To be on the safe side, I
5808 have increased the buffer size for the ${rfc2047: expansion operator from
5811 33. It is now permitted to omit both strings after an "if" condition; if the
5812 condition is true, the result is "true". As before, when the second string
5813 is omitted, a false condition yields an empty string. This makes it less
5814 cumbersome to write custom ACL and router conditions.
5816 34. Failure to deliver a bounce message always caused it to be frozen, even if
5817 there was an errors_to setting on the router. The errors_to setting is now
5820 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5821 canonical form (fully expanded) before being placed in
5822 $sender_host_address.
5824 36. The table in the code that translates DNS record types into text (T_A to
5825 "A" for instance) was missing entries for NS and CNAME. It is just possible
5826 that this could have caused confusion if both these types were looked up
5827 for the same domain, because the text type is used as part of Exim's
5828 per-process caching. But the chance of anyone hitting this buglet seems
5831 37. The dnsdb lookup has been extended in a number of ways.
5833 (1) There is a new type, "zns", which walks up the domain tree until it
5834 finds some nameserver records. It should be used with care.
5836 (2) There is a new type, "mxh", which is like "mx" except that it returns
5837 just the host names, not the priorities.
5839 (3) It is now possible to give a list of domains (or IP addresses) to be
5840 looked up. The behaviour when one of the lookups defers can be
5841 controlled by a keyword.
5843 (4) It is now possible to specify the separator character for use when
5844 multiple records are returned.
5846 38. The dnslists ACL condition has been extended: it is now possible to supply
5847 a list of IP addresses and/or domains to be looked up in a particular DNS
5850 39. Added log_selector=+queue_time_overall.
5852 40. When running the queue in the test harness, wait just a tad after forking a
5853 delivery process, to get repeatability of debugging output.
5855 41. Include certificate and key file names in error message when GnuTLS fails
5856 to set them up, because the GnuTLS error message doesn't include the name
5857 of the failing file when there is a problem reading it.
5859 42. Allow both -bf and -bF in the same test run.
5861 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5863 44. The "Exiscan patch" is now merged into the mainline Exim source.
5865 45. Sometimes the final signoff response after QUIT could fail to get
5866 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5867 < 0 before doing a fflush(). This bug looks as though it goes back to the
5868 introduction of TLS in release 3.20, but "sometimes" must have been rare
5869 because the tests only now provoked it.
5871 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5872 (this can affect the format of dates).
5874 47. exim_tidydb, when checking for the continued existence of a message for
5875 which it has found a message-specific retry record, was not finding
5876 messages that were in split spool directories. Consequently, it was
5877 deleting retry records that should have stayed in existence.
5879 48. Steve fixed some bugs in eximstats.
5881 49. The SPA authentication driver was not abandoning authentication and moving
5882 on to the next authenticator when an expansion was forced to fail,
5883 contradicting the general specification for all authenticators. Instead it
5884 was generating a temporary error. It now behaves as specified.
5886 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5887 (the order specifies the preference for clients). The order is now AES256,
5888 AES128, 3DES, ARCFOUR128.
5890 51. Small patch to Sieve code - explicitly set From: when generating an
5893 52. Exim crashed if a remote delivery caused a very long error message to be
5894 recorded - for instance if somebody sent an entire SpamAssassin report back
5895 as a large number of 550 error lines. This bug was coincidentally fixed by
5896 increasing the size of one of Exim's internal buffers (big_buffer) that
5897 happened as part of the Exiscan merge. However, to be on the safe side, I
5898 have made the code more robust (and fixed the comments that describe what
5901 53. Now that there can be additional text after "Completed" in log lines (if
5902 the queue_time_overall log selector is set), a one-byte patch to exigrep
5903 was needed to allow it to recognize "Completed" as not the last thing in
5906 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5907 patch that reportedly fixes this has been added. I am not expert enough to
5908 create a test for it. This is what the patch creator wrote:
5910 "I found a little strange behaviour of ldap code when working with
5911 Windows 2003 AD Domain, where users was placed in more than one
5912 Organization Units. When I tried to give exim partial DN, the exit code
5913 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5914 But simultaneously result of request was absolutely normal ldap result,
5915 so I produce this patch..."
5917 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5918 REFERENCE, so I have modified the code to exclude the patch when that macro
5921 55. Some experimental protocols are using DNS PTR records for new purposes. The
5922 keys for these records are domain names, not reversed IP addresses. The
5923 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5924 leaves it alone. Component reversal etc. now happens only for IP addresses.
5927 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5929 57. Double the size of the debug message buffer (to 2048) so that more of very
5930 long debug lines gets shown.
5932 58. The exicyclog utility now does better if the number of log files to keep
5933 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5935 59. Two changes related to the smtp_active_hostname option:
5937 (1) $smtp_active_hostname is now available as a variable.
5938 (2) The default for smtp_banner uses $smtp_active_hostname instead
5939 of $primary_hostname.
5941 60. The host_aton() function is supposed to be passed a string that is known
5942 to be a valid IP address. However, in the case of IPv6 addresses, it was
5943 not checking this. This is a hostage to fortune. Exim now panics and dies
5944 if the condition is not met. A case was found where this could be provoked
5945 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5946 components; fortuitously, this particular loophole had already been fixed
5947 by change 4.50/55 above.
5949 If there are any other similar loopholes, the new check in host_aton()
5950 itself should stop them being exploited. The report I received stated that
5951 data on the command line could provoke the exploit when Exim was running as
5952 exim, but did not say which command line option was involved. All I could
5953 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5954 running as the user.
5957 61. There was a buffer overflow vulnerability in the SPA authentication code
5958 (which came originally from the Samba project). I have added a test to the
5959 spa_base64_to_bits() function which I hope fixes it.
5962 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5963 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5965 63. The daemon start-up calls getloadavg() while still root for those OS that
5966 need the first call to be done as root, but it missed one case: when
5967 deliver_queue_load_max is set with deliver_drop_privilege. This is
5968 necessary for the benefit of the queue runner, because there is no re-exec
5969 when deliver_drop_privilege is set.
5971 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5972 This has been fixed.
5974 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5975 was in use, was not putting the data itself into the right store pool;
5976 consequently, it could be overwritten for a subsequent message in the same
5977 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5980 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5982 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5983 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5984 the function were treating the return as a boolean value, which happened to
5985 work because 0=false and not-0=true, but is not correct code.
5987 68. The host_aton() function was not handling scoped IPv6 addresses (those
5988 with, for example, "%eth0" on the end) correctly.
5990 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5991 negated items (that is, ~something) in unsigned ints. Some compilers
5992 apparently mutter when there is no cast.
5994 70. If an address verification called from an ACL failed, and did not produce a
5995 user-specific message (i.e. there was only a "system" message), nothing was
5996 put in $acl_verify_message. In this situation, it now puts the system
5999 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6000 session; change 4.31/43 added the unwanted input to the log line - except
6001 that it did not do this in the start of session case. It now does.
6003 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6004 This is wrong and can cause the other end to generate a synchronization
6005 error if it is another Exim or anything else that does the synchronization
6006 check. A QUIT command is no longer sent after a timeout.
6008 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6009 during host lookups.
6011 74. The defer_ok option of callout verification was not working if it was used
6012 when verifying addresses in header lines, that is, for this case:
6014 verify = header_sender/callout=defer_ok
6016 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6017 those file descriptors could be used for SMTP connections. If anything
6018 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6019 could be sent to the SMTP client, causing chaos. The daemon now opens
6020 stdin, stdout, and stderr to /dev/null when it puts itself into the
6023 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6024 log by default. The user can override this with suitable Perl magic.
6026 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6027 the log message when discard triggers, was not working for the DATA ACL or
6028 for the non-SMTP ACL.
6030 78. Error message wording change in sieve.c.
6032 79. If smtp_accept_max_per_host was set, the number of connections could be
6033 restricted to fewer than expected, because the daemon was trying to set up
6034 a new connection before checking whether the processes handling previous
6035 connections had finished. The check for completed processes is now done
6036 earlier. On busy systems, this bug wouldn't be noticed because something
6037 else would have woken the daemon, and it would have reaped the completed
6040 80. If a message was submitted locally by a user whose login name contained one
6041 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6042 It caused a spool format error. I have fixed the spool reading code. A
6043 related problem was that the "from" clause in the Received: line became
6044 illegal because of the space(s). It is now covered by ${quote_local_part.
6046 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6049 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6051 83. Patch from Sieve maintainer to fix unterminated string problem in
6052 "vacation" handling.
6054 84. Some minor changes to the Linux configuration files to help with other
6055 OS variants using glibc.
6057 85. One more patch for Sieve to update vacation handling to latest spec.
6060 ----------------------------------------------------
6061 See the note above about the 4.44 and 4.50 releases.
6062 ----------------------------------------------------
6068 1. Change 4.43/35 introduced a bug that caused file counts to be
6069 incorrectly computed when quota_filecount was set in an appendfile
6072 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6073 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6076 3. Give more explanation in the error message when the command for a transport
6077 filter fails to execute.
6079 4. There are several places where Exim runs a non-Exim command in a
6080 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6081 was being done only for the command run by the queryprogram router. It is
6082 now done for all such subprocesses. The other cases are: ${run, transport
6083 filters, and the commands run by the lmtp and pipe transports.
6085 5. Some older OS have a limit of 256 on the maximum number of file
6086 descriptors. Exim was using setrlimit() to set 1000 as a large value
6087 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6088 systems. I've change it so that if it can't get 1000, it tries for 256.
6090 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6091 was an oversight, and furthermore, ever since the addition of extra
6092 controls (e.g. 4.43/32), the checks on when to allow different forms of
6093 "control" were broken. There should now be diagnostics for all cases when a
6094 control that does not make sense is encountered.
6096 7. $recipients is now available in the predata ACL (oversight).
6098 8. Tidy the search cache before the fork to do a delivery from a message
6099 received from the command line. Otherwise the child will trigger a lookup
6100 failure and thereby defer the delivery if it tries to use (for example) a
6101 cached ldap connection that the parent has called unbind on.
6103 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6104 of $address_data from the recipient verification was clobbered by the
6105 sender verification.
6107 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6108 was its contents. (It was OK if the option was not defined at all.)
6110 11. A "Completed" log line is now written for messages that are removed from
6111 the spool by the -Mrm option.
6113 12. $host_address is now set to the target address during the checking of
6114 ignore_target_hosts.
6116 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6117 being passed; this would have caused $sender_host_name to have been used if
6118 matching the list had actually called for a host name (not very likely,
6119 since this list is usually IP addresses). A host name is now passed as
6122 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6123 code that specifies a non-restarting handler (typically sigaction() in
6124 modern systems) in an attempt to fix a rare and obscure crash bug.
6126 15. Narrowed the window for a race in the daemon that could cause it to ignore
6127 SIGCHLD signals. This is not a major problem, because they are used only to
6128 wake it up if nothing else does.
6130 16. A malformed maildirsize file could cause Exim to calculate negative values
6131 for the mailbox size or file count. Odd effects could occur as a result.
6132 The maildirsize information is now recalculated if the size or filecount
6135 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6136 support for a long time. Removed HAVE_SYS_VFS_H.
6138 18. Updated exipick to current release from John Jetmore.
6140 19. Allow an empty sender to be matched against a lookup in an address list.
6141 Previously the only cases considered were a regular expression, or an
6144 20. Exim went into a mad DNS lookup loop when doing a callout where the
6145 host was specified on the transport, if the DNS lookup yielded more than
6148 21. The RFC2047 encoding function was originally intended for short strings
6149 such as real names; it was not keeping to the 75-character limit for
6150 encoded words that the RFC imposes. It now respects the limit, and
6151 generates multiple encoded words if necessary. To be on the safe side, I
6152 have increased the buffer size for the ${rfc2047: expansion operator from
6155 22. Failure to deliver a bounce message always caused it to be frozen, even if
6156 there was an errors_to setting on the router. The errors_to setting is now
6159 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6160 canonical form (fully expanded) before being placed in
6161 $sender_host_address.
6163 24. Updated eximstats to version 1.33
6165 25. Include certificate and key file names in error message when GnuTLS fails
6166 to set them up, because the GnuTLS error message doesn't include the name
6167 of the failing file when there is a problem reading it.
6169 26. Expand error message when OpenSSL has problems setting up cert/key files.
6172 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6173 (this can affect the format of dates).
6175 28. exim_tidydb, when checking for the continued existence of a message for
6176 which it has found a message-specific retry record, was not finding
6177 messages that were in split spool directories. Consequently, it was
6178 deleting retry records that should have stayed in existence.
6180 29. eximstats updated to version 1.35
6181 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6182 1.35 - bugfix such that pie charts by volume are generated correctly
6184 30. The SPA authentication driver was not abandoning authentication and moving
6185 on to the next authenticator when an expansion was forced to fail,
6186 contradicting the general specification for all authenticators. Instead it
6187 was generating a temporary error. It now behaves as specified.
6189 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6190 (the order specifies the preference for clients). The order is now AES256,
6191 AES128, 3DES, ARCFOUR128.
6193 31. Small patch to Sieve code - explicitly set From: when generating an
6196 32. Exim crashed if a remote delivery caused a very long error message to be
6197 recorded - for instance if somebody sent an entire SpamAssassin report back
6198 as a large number of 550 error lines. This bug was coincidentally fixed by
6199 increasing the size of one of Exim's internal buffers (big_buffer) that
6200 happened as part of the Exiscan merge. However, to be on the safe side, I
6201 have made the code more robust (and fixed the comments that describe what
6204 33. Some experimental protocols are using DNS PTR records for new purposes. The
6205 keys for these records are domain names, not reversed IP addresses. The
6206 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6207 leaves it alone. Component reversal etc. now happens only for IP addresses.
6210 34. The host_aton() function is supposed to be passed a string that is known
6211 to be a valid IP address. However, in the case of IPv6 addresses, it was
6212 not checking this. This is a hostage to fortune. Exim now panics and dies
6213 if the condition is not met. A case was found where this could be provoked
6214 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6215 components; fortuitously, this particular loophole had already been fixed
6216 by change 4.50/55 or 4.44/33 above.
6218 If there are any other similar loopholes, the new check in host_aton()
6219 itself should stop them being exploited. The report I received stated that
6220 data on the command line could provoke the exploit when Exim was running as
6221 exim, but did not say which command line option was involved. All I could
6222 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6223 running as the user.
6226 35. There was a buffer overflow vulnerability in the SPA authentication code
6227 (which came originally from the Samba project). I have added a test to the
6228 spa_base64_to_bits() function which I hope fixes it.
6231 36. The daemon start-up calls getloadavg() while still root for those OS that
6232 need the first call to be done as root, but it missed one case: when
6233 deliver_queue_load_max is set with deliver_drop_privilege. This is
6234 necessary for the benefit of the queue runner, because there is no re-exec
6235 when deliver_drop_privilege is set.
6237 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6238 was in use, was not putting the data itself into the right store pool;
6239 consequently, it could be overwritten for a subsequent message in the same
6240 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6243 38. Sometimes the final signoff response after QUIT could fail to get
6244 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6245 < 0 before doing a fflush(). This bug looks as though it goes back to the
6246 introduction of TLS in release 3.20, but "sometimes" must have been rare
6247 because the tests only now provoked it.
6253 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6254 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6255 Now it returns an integer. A number of calls were still expecting a T/F
6256 return. Fortuitously, in all cases, the tests worked in OK situations,
6257 which is the norm. However, things would have gone wrong on any write
6258 failures on the smtp file descriptor. This function is used when sending
6259 messages over SMTP and also when doing verify callouts.
6261 2. When Exim is called to do synchronous delivery of a locally submitted
6262 message (the -odf or -odi options), it no longer closes stderr before doing
6265 3. Implemented the mua_wrapper option.
6267 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6269 5. Implemented the functions header_remove(), header_testname(),
6270 header_add_at_position(), and receive_remove_recipient(), and exported them
6273 6. If an ACL "warn" statement specified the addition of headers, Exim already
6274 inserted X-ACL-Warn: at the start if there was no header name. However, it
6275 was not making this test for the second and subsequent header lines if
6276 there were newlines in the string. This meant that an invalid header could
6277 be inserted if Exim was badly configured.
6279 7. Allow an ACL "warn" statement to add header lines at the start or after all
6280 the Received: headers, as well as at the end.
6282 8. Added the rcpt_4xx retry error code.
6284 9. Added postmaster_mailfrom=xxx to callout verification option.
6286 10. Added mailfrom=xxxx to the callout verification option, for verify=
6289 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6290 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6292 12. Inserted some casts to stop certain compilers warning when using pointer
6293 differences as field lengths or precisions in printf-type calls (mostly
6294 affecting debugging statements).
6296 13. Added optional readline() support for -be (dynamically loaded).
6298 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6299 same clock tick as a message's arrival, so that its received time was the
6300 same as the "first fail" time on the retry record, and that message
6301 remained on the queue past the ultimate address timeout, every queue runner
6302 would try a delivery (because it was past the ultimate address timeout) but
6303 after another failure, the ultimate address timeout, which should have then
6304 bounced the address, did not kick in. This was a "< instead of <=" error;
6305 in most cases the first failure would have been in the next clock tick
6306 after the received time, and all would be well.
6308 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6309 being recognized when the domain list was tested by the match_domain
6310 condition in an expansion string.
6312 16. Added the ${str2b64: operator.
6314 17. Exim was always calling setrlimit() to set a large limit for the number of
6315 processes, without checking whether the existing limit was already
6316 adequate. (It did check for the limit on file descriptors.) Furthermore,
6317 errors from getrlimit() and setrlimit() were being ignored. Now they are
6318 logged to the main and panic logs, but Exim does carry on, to try to do its
6319 job under whatever limits there are.
6321 18. Imported PCRE 5.0.
6323 19. Trivial typo in log message " temporarily refused connection" (the leading
6326 20. If the log selector return_path_on_delivery was set and an address was
6327 redirected to /dev/null, the delivery process crashed because it assumed
6328 that a return path would always be set for a "successful" delivery. In this
6329 case, the whole delivery is bypassed as an optimization, and therefore no
6332 21. Internal re-arrangement: the function for sending a challenge and reading
6333 a response while authentication was assuming a zero-terminated challenge
6334 string. It's now changed to take a pointer and a length, to allow for
6335 binary data in such strings.
6337 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6339 23. Exim was not respecting finduser_retries when seeking the login of the
6340 uid under which it was called; it was always trying 10 times. (The default
6341 setting of finduser_retries is zero.) Also, it was sleeping after the final
6342 failure, which is pointless.
6344 24. Implemented tls_on_connect_ports.
6346 25. Implemented acl_smtp_predata.
6348 26. If the domain in control=submission is set empty, Exim assumes that the
6349 authenticated id is a complete email address when it generates From: or
6350 Sender: header lines.
6352 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6353 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6354 chown and chgrp in /bin and hostname in /usr/bin.
6356 28. Exim was keeping the "process log" file open after each use, just as it
6357 does for the main log. This opens the possibility of it remaining open for
6358 long periods when the USR1 signal hits a daemon. Occasional processlog
6359 errors were reported, that could have been caused by this. Anyway, it seems
6360 much more sensible not to leave this file open at all, so that is what now
6363 29. The long-running daemon process does not normally write to the log once it
6364 has entered its main loop, and it closes the log before doing so. This is
6365 so that log files can straightforwardly be renamed and moved. However,
6366 there are a couple of unusual error situations where the daemon does write
6367 log entries, and I had neglected to close the log afterwards.
6369 30. The text of an SMTP error response that was received during a remote
6370 delivery was being truncated at 512 bytes. This is too short for some of
6371 the long messages that one sometimes sees. I've increased the limit to
6374 31. It is now possible to make retry rules that apply only when a message has a
6375 specific sender, in particular, an empty sender.
6377 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6378 it possible to be selective about when SMTP synchronization is enforced.
6380 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6382 32. Implemented hosts_connection_nolog.
6384 33. Added an ACL for QUIT.
6386 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6389 35. Added mailbox_size and mailbox_filecount to appendfile.
6391 36. Added control = no_multiline_responses to ACLs.
6393 37. There was a bug in the logic of the code that waits for the clock to tick
6394 in the case where the clock went backwards by a substantial amount such
6395 that the microsecond fraction of "now" was more than the microsecond
6396 fraction of "then" (but the whole seconds number was less).
6398 38. Added support for the libradius Radius client library this is found on
6399 FreeBSD (previously only the radiusclient library was supported).
6405 1. When certain lookups returned multiple values in the form name=value, the
6406 quoting of the values was not always being done properly. Specifically:
6407 (a) If the value started with a double quote, but contained no whitespace,
6409 (b) If the value contained whitespace other than a space character (i.e.
6410 tabs or newlines or carriage returns) it was not quoted.
6411 This fix has been applied to the mysql and pgsql lookups by writing a
6412 separate quoting function and calling it from the lookup code. The fix
6413 should probably also be applied to nisplus, ibase and oracle lookups, but
6414 since I cannot test any of those, I have not disturbed their existing code.
6416 2. A hit in the callout cache for a specific address caused a log line with no
6417 reason for rejecting RCPT. Now it says "Previous (cached) callout
6418 verification failure".
6420 3. There was an off-by-one bug in the queryprogram router. An over-long
6421 return line was truncated at 256 instead of 255 characters, thereby
6422 overflowing its buffer with the terminating zero. As well as fixing this, I
6423 have increased the buffer size to 1024 (and made a note to document this).
6425 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6426 when Exim is waiting for an SMTP response from a remote server, Exim
6427 restarts its select() call on the socket, thereby resetting its timeout.
6428 This is not a problem when such interrupts are rare. Somebody set up a cron
6429 job to run exiwhat every 2 minutes, which is less than the normal select()
6430 timeout (5 or 10 minutes). This meant that the select() timeout never
6431 kicked in because it was always reset. I have fixed this by comparing the
6432 time when an interrupt arrives with the time at the start of the first call
6433 to select(). If more time than the timeout has elapsed, the interrupt is
6434 treated as a timeout.
6436 5. Some internal re-factoring in preparation for the addition of Sieve
6437 extensions (by MH). In particular, the "personal" test is moved to a
6438 separate function, and given an option for scanning Cc: and Bcc: (which is
6439 not set for Exim filters).
6441 6. When Exim created an email address using the login of the caller as the
6442 local part (e.g. when creating a From: or Sender: header line), it was not
6443 quoting the local part when it contained special characters such as @.
6445 7. Installed new OpenBSD configuration files.
6447 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6448 try to make them clearer.
6450 9. Callout options, other than the timeout value, were being ignored when
6451 verifying sender addresses in header lines. For example, when using
6453 verify = header_sender/callout=no_cache
6455 the cache was (incorrectly) being used.
6457 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6458 only the Cygwin environment.
6460 11. When return_path_on_delivery was set as a log selector, if different remote
6461 addresses in the same message used different return paths and parallel
6462 remote delivery occurred, the wrong values would sometimes be logged.
6463 (Whenever a remote delivery process finished, the return path value from
6464 the most recently started remote delivery process was logged.)
6466 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6467 lines when AUTH and/or TLS are in use. This is the "received protocol"
6468 field. Exim used to use "asmtp" for authenticated SMTP, without any
6469 indication (in the protocol name) for TLS use. Now it follows the RFC and
6470 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6471 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6472 names appear in log lines as well as in Received: header lines.
6474 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6475 extensions, and comparison tests, and to fix some bugs.
6477 14. Changes to the "personal" filter test:
6479 (1) The test was buggy in that it was just doing the equivalent of
6480 "contains" tests on header lines. For example, if a user's address was
6481 anne@some.where, the "personal" test would incorrectly be true for
6483 To: susanne@some.where
6485 This test is now done by extracting each address from the header in turn,
6486 and checking the entire address. Other tests that are part of "personal"
6487 are now done using regular expressions (for example, to check local parts
6488 of addresses in From: header lines).
6490 (2) The list of non-personal local parts in From: addresses has been
6491 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6492 taken from the Sieve specification recommendations.
6494 (3) If the message contains any header line starting with "List-" it is
6495 treated as non-personal.
6497 (4) The test for "circular" in the Subject: header line has been removed
6498 because it now seems ill-conceived.
6500 15. Minor typos in src/EDITME comments corrected.
6502 16. Installed latest exipick from John Jetmore.
6504 17. If headers_add on a router specified a text string that was too long for
6505 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6506 of string_sprintf() is now avoided.
6508 18. $message_body_size was not set (it was always zero) when running the DATA
6509 ACL and the local_scan() function.
6511 19. For the "mail" command in an Exim filter, no default was being set for
6512 the once_repeat time, causing a random time value to be used if "once" was
6513 specified. (If the value happened to be <= 0, no repeat happened.) The
6514 default is now 0s, meaning "never repeat". The "vacation" command was OK
6515 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6516 (I found it when inspecting the code).
6518 20. There is now an overall timeout for performing a callout verification. It
6519 defaults to 4 times the callout timeout, which applies to individual SMTP
6520 commands during the callout. The overall timeout applies when there is more
6521 than one host that can be tried. The timeout is checked before trying the
6522 next host. This prevents very long delays if there are a large number of
6523 hosts and all are timing out (e.g. when the network connections are timing
6524 out). The value of the overall timeout can be changed by specifying an
6525 additional sub-option for "callout", called "maxwait". For example:
6527 verify = sender/callout=5s,maxwait=20s
6529 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6530 to the end before writing, but this should make it even safer).
6532 22. Exim was forgetting that it had advertised PIPELINING for the second and
6533 subsequent messages on an SMTP connection. It was also not resetting its
6534 memory on STARTTLS and an internal HELO.
6536 23. When Exim logs an SMTP synchronization error within a session, it now
6537 records whether PIPELINING has been advertised or not.
6539 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6540 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6541 rather than long int.
6543 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6545 26. Added the never_mail option to autoreply.
6551 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6552 crash if the getsockname() call failed; this can happen if a connection is
6553 closed very soon after it is established. The problem was simply in the
6554 order in which certain operations were done, causing Exim to try to write
6555 to the SMTP stream before it had set up the file descriptor. The bug has
6556 been fixed by making things happen in the correct order.
6562 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6563 before the connection was closed, thus losing the rejection response.
6565 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6566 some early Solaris releases, but causes trouble in current releases where
6567 socklen_t is defined.
6569 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6572 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6575 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6576 that releasing the top of it at the end releases what was used for sub-
6577 expansions (unless the block got too big). However, discard this block if
6578 the first thing is a variable or header, so that we can use its block when
6579 it is dynamic (useful for very large $message_headers, for example).
6581 6. Lookups now cache *every* query, not just the most recent. A new, separate
6582 store pool is used for this. It can be recovered when all lookup caches are
6583 flushed. Lookups now release memory at the end of their result strings.
6584 This has involved some general refactoring of the lookup sources.
6586 7. Some code has been added to the store_xxx() functions to reduce the amount
6587 of flapping under certain conditions.
6589 8. log_incoming_interface used to affect only the <= reception log lines. Now
6590 it causes the local interface and port to be added to several more SMTP log
6591 lines, for example "SMTP connection from", and rejection lines.
6593 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6595 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6597 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6598 could be overwritten at the end of the current message (or the start of a
6599 new message if it was set in a HELO ACL). The value is now preserved for
6600 the duration of the SMTP connection.
6602 12. If a transport had a headers_rewrite setting, and a matching header line
6603 contained an unqualified address, that address was qualified, even if it
6604 did not match any rewriting rules. The underlying bug was that the values
6605 of the flags that permit the existence of unqualified sender and recipient
6606 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6607 non-local messages, and by -bnq for local messages) were not being
6608 preserved with the message after it was received.
6610 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6611 "next input=" as part of the text comprising the host identity instead of
6612 the correct text. The code was using the same buffer for two different
6613 strings. However, depending on which order the printing function evaluated
6614 its arguments, the bug did not always show up. Under Linux, for example, my
6615 test suite worked just fine.
6617 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6618 doesn't work with some older versions of Perl. It has been changed to "my",
6619 which in any case is probably the better facility to use.
6621 15. A really picky compiler found some instances of statements for creating
6622 error messages that either had too many or two few arguments for the format
6625 16. The size of the buffer for calls to the DNS resolver has been increased
6626 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6627 for addresses that have a lot of PTR records. This alleviates a problem; it
6628 does not fully solve it.
6630 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6631 buffer now truncates the list and logs the incident, which is the same
6632 action as happens when Exim is looking up a host name and its aliases.
6633 Previously in this situation something unpredictable would happen;
6634 sometimes it was "internal error: store_reset failed".
6636 18. If a server dropped the connection unexpectedly when an Exim client was
6637 using GnuTLS and trying to read a response, the client delivery process
6638 crashed while trying to generate an error log message.
6640 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6641 string, for example:
6643 warn message = H1: something\nH2: something
6645 the text was added as a single header line from Exim's point of view
6646 though it ended up OK in the delivered message. However, searching for the
6647 second and subsequent header lines using $h_h2: did not work. This has been
6648 fixed. Similarly, if a system filter added multiple headers in this way,
6649 the routers could not see them.
6651 20. Expanded the error message when iplsearch is called with an invalid key to
6652 suggest using net-iplsearch in a host list.
6654 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6655 ACLs are no longer actually imposed (and a message to that effect is
6658 22. If a "gecos" field in a passwd entry contained escaped characters, in
6659 particular, if it contained a \" sequence, Exim got it wrong when building
6660 a From: or a Sender: header from that name. A second bug also caused
6661 incorrect handling when an unquoted " was present following a character
6662 that needed quoting.
6664 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6665 was not being matched caselessly.
6667 24. Arranged for all hyphens in the exim.8 source to be escaped with
6670 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6671 properly. Recipient callout cache records were still being keyed to include
6672 the sender, even when use_sender was set false. This led to far more
6673 callouts that were necessary. The sender is no longer included in the key
6674 when use_sender is false.
6676 26. Added "control = submission" modifier to ACLs.
6678 27. Added the ${base62d: operator to decode base 62 numbers.
6680 28. dnsdb lookups can now access SRV records.
6682 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6683 the configuration file.
6685 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6686 (-v) mode. This makes the output for a verbose queue run more intelligible.
6688 31. Added a use_postmaster feature to recipient callouts.
6690 32. Added the $body_zerocount variable, containing the number of binary zero
6691 bytes in the message body.
6693 33. The time of last modification of the "new" subdirectory is now used as the
6694 "mailbox time last read" when there is a quota error for a maildir
6697 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6699 35. Added +ignore_unknown as a special item in host lists.
6701 36. Code for decoding IPv6 addresses in host lists is now included, even if
6702 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6703 address was recognized as an IP address, but was then not correctly decoded
6704 into binary, causing unexpected and incorrect effects when compared with
6711 1. Very minor rewording of debugging text in manualroute to say "list of
6712 hosts" instead of "hostlist".
6714 2. If verify=header_syntax was set, and a header line with an unqualified
6715 address (no domain) and a large number of spaces between the end of the
6716 name and the colon was received, the reception process suffered a buffer
6717 overflow, and (when I tested it) crashed. This was caused by some obsolete
6718 code that should have been removed. The fix is to remove it!
6720 3. When running in the test harness, delay a bit after writing a bounce
6721 message to get a bit more predictability in the log output.
6723 4. Added a call to search_tidyup() just before forking a reception process. In
6724 theory, someone could use a lookup in the expansion of smtp_accept_max_
6725 per_host which, without the tidyup, could leave open a database connection.
6727 5. Added the variables $recipient_data and $sender_data which get set from a
6728 lookup success in an ACL "recipients" or "senders" condition, or a router
6729 "senders" option, similar to $domain_data and $local_part_data.
6731 6. Moved the writing of debug_print from before to after the "senders" test
6734 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6735 problems for message scanning, either using a data ACL, or using
6736 local_scan() because the Received: header was not generated till after they
6737 were called (in order to set the time as the time of reception completion).
6738 I have revised the way this works. The header is now generated after the
6739 body is received, but before the ACL or local_scan() are called. After they
6740 are run, the timestamp in the header is updated.
6746 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6747 before starting a queue runner without re-exec. This happened only when
6748 deliver_drop_privilege was set or when the Exim user was set to root. The
6749 effect of the bug was that timeouts during subsequent deliveries caused
6750 crashes instead of being properly handled. The handler is now left at its
6751 default (and expected) setting.
6753 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6754 message, again when deliver_drop_privilege is set or Exim is run as root.
6755 The bug described in (1) was not present in this case, but the tidying up
6756 of the other signals was missing. I have made the two cases consistent.
6758 3. The ignore_target_hosts setting on a manualroute router was being ignored
6759 for hosts that were looked up using the /MX notation.
6761 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6764 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6765 operated on the sender address. After changing the $sender_address to <>
6766 for the sender address verify, Exim was re-instated it as the original
6767 (before rewriting) address, but remembering that it had rewritten it, so it
6768 wasn't rewriting it again. This bug also had the effect of breaking the
6769 sender address verification caching when the sender address was rewritten.
6771 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6772 This has been changed so that if the ip literal address matches
6773 ignore_target_hosts, the router declines.
6775 7. Added expansion conditions match_domain, match_address, and match_local_
6776 part (NOT match_host).
6778 8. The placeholder for the Received: header didn't have a length field set.
6780 9. Added code to Exim itself and to exim_lock to test for a specific race
6781 condition that could lead to file corruption when using MBX delivery. The
6782 issue is with the lockfile that is created in /tmp. If this file is removed
6783 after a process has opened it but before that process has acquired a lock,
6784 there is the potential for a second process to recreate the file and also
6785 acquire a lock. This could lead to two Exim processes writing to the file
6786 at the same time. The added code performs the same test as UW imapd; it
6787 checks after acquiring the lock that its file descriptor still refers to
6788 the same named file.
6790 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6791 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6794 11. Added the smtp_active_hostname option. If used, this will typically be made
6795 to depend on the incoming interface address. Because $interface_address is
6796 not set up until the daemon has forked a reception process, error responses
6797 that can happen earlier (such as "too many connections") no longer contain
6800 12. If an expansion in a condition on a "warn" statement fails because a lookup
6801 defers, the "warn" statement is abandoned, and the next ACL statement is
6802 processed. Previously this caused the whole ACL to be aborted.
6804 13. Added the iplsearch lookup type.
6806 14. Added ident_timeout as a log selector.
6808 15. Added tls_certificate_verified as a log selector.
6810 16. Added a global option tls_require_ciphers (compare the smtp transport
6811 option of the same name). This controls incoming TLS connections.
6813 17. I finally figured out how to make tls_require_ciphers do a similar thing
6814 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6815 before starting the TLS session.
6817 18. Tabs are now shown as \t in -bP output.
6819 19. If the log selector return_path_on_delivery was set, Exim crashed when
6820 bouncing a message because it had too many Received: header lines.
6822 20. If two routers both had headers_remove settings, and the first one included
6823 a superfluous trailing colon, the final name in the first list and the
6824 first name in the second list were incorrectly joined into one item (with a
6825 colon in the middle).
6831 1. Added -C and -D options to the exinext utility, mainly to make it easier
6832 to include in the automated testing, but these could be helpful when
6833 multiple configurations are in use.
6835 2. The exinext utility was not formatting the output nicely when there was
6836 an alternate port involved in the retry record key, nor when there was a
6837 message id as well (for retries that were specific to a specific message
6838 and a specific host). It was also confused by IPv6 addresses, because of
6839 the additional colons they contain. I have fixed the IPv4 problem, and
6840 patched it up to do a reasonable job for IPv6.
6842 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6843 delivery, the log line now contains "pipelined" if PIPELINING was used.
6845 4. An SMTP transport process used to panic and die if the bind() call to set
6846 an explicit outgoing interface failed. This has been changed; it is now
6847 treated in the same way as a connect() failure.
6849 5. A reference to $sender_host_name in the part of a conditional expansion
6850 that was being skipped was still causing a DNS lookup. This no longer
6853 6. The def: expansion condition was not recognizing references to header lines
6854 that used bh_ and bheader_.
6856 7. Added the _cache feature to named lists.
6858 8. The code for checking quota_filecount in the appendfile transport was
6859 allowing one more file than it should have been.
6861 9. For compatibility with Sendmail, the command line option
6869 and sets the incoming protocol and host name (for trusted callers). The
6870 host name and its colon can be omitted when only the protocol is to be set.
6871 Note the Exim already has two private options, -pd and -ps, that refer to
6872 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6873 "s", but I don't think that's a major issue.
6875 10. A number of refactoring changes to the code, none of which should affect
6878 (a) The number of logging options was getting close to filling up the
6879 32-bit word that was used as a bit map. I have split them into two classes:
6880 those that are passed in the argument to log_write(), and those that are
6881 only ever tested independently outside of that function. These are now in
6882 separate 32-bit words, so there is plenty of room for expansion again.
6883 There is no change in the user interface or the logging behaviour.
6885 (b) When building, for example, log lines, the code previously used a
6886 macro that called string_cat() twice, in order to add two strings. This is
6887 not really sufficiently general. Furthermore, there was one instance where
6888 it was actually wrong because one of the argument was used twice, and in
6889 one call a function was used. (As it happened, calling the function twice
6890 did not affect the overall behaviour.) The macro has been replaced by a
6891 function that can join an arbitrary number of extra strings onto a growing
6894 (c) The code for expansion conditions now uses a table and a binary chop
6895 instead of a serial search (which was left over from when there were very
6896 few conditions). Also, it now recognizes conditions like "pam" even when
6897 the relevant support is not compiled in: a suitably worded error message is
6898 given if an attempt is made to use such a condition.
6900 11. Added ${time_interval:xxxxx}.
6902 12. A bug was causing one of the ddress fields not to be passed back correctly
6903 from remote delivery subprocesses. The field in question was not being
6904 subsequently used, so this caused to problems in practice.
6906 13. Added new log selectors queue_time and deliver_time.
6908 14. Might have fixed a bug in maildirsizefile handling that threw up
6909 "unexpected character" debug warnings, and recalculated the data
6910 unnecessarily. In any case, I expanded the warning message to give more
6913 15. Added the message "Restricted characters in address" to the statements in
6914 the default ACL that block characters like @ and % in local parts.
6916 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6917 Three changes have been made:
6919 (a) There was a serious bug; a negative response to MAIL caused the whole
6920 recipient domain to be cached as invalid, thereby blocking all messages
6921 to all local parts at the same domain, from all senders. This bug has
6922 been fixed. The domain is no longer cached after a negative response to
6923 MAIL if the sender used is not empty.
6925 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6928 (c) A new callout option, "use_sender" has been added for people who want
6929 the modified behaviour.
6935 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6938 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6939 indeed breaks things for older releases.
6941 3. Added additional logging to the case where there is a problem reading data
6942 from a filter that is running in a subprocess using a pipe, in order to
6943 try to track down a specific problem.
6945 4. Testing facility fudge: when running in the test harness and attempting
6946 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6947 getting "No route to host". Convert this to a timeout.
6949 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6952 6. Some OS don't have socklen_t but use size_t instead. This affects the
6953 fifth argument of getsockopt() amongst other things. This is now
6954 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6955 can be set for individual OS. I have set it for SunOS5, OSF1, and
6956 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6957 some earlier ones do not.
6959 7. Change 4.30/15 was not doing the test caselessly.
6961 8. The standard form for an IPv6 address literal was being rejected by address
6962 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6963 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6964 this, as well as the form without the "IPv6" on the front (but only when
6965 address literals are enabled, of course).
6967 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6969 10. Exim crashed if a message with an empty sender address specified by -f
6970 encountered a router with an errors_to setting. This could be provoked only
6971 by a command such as
6975 where an empty string was supplied; "<>" did not hit this bug.
6977 11. Installed PCRE release 4.5.
6979 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6980 remained set. It is now erased.
6982 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6983 times from message ids (which are base 36 rather than the normal 62).
6985 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6986 were being counted as actual protocol errors, and logged if the log
6987 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6988 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6989 and DATA following a set of rejected RCPTs do not count as protocol errors.
6990 In other words, Exim assumes they were pipelined, though this may not
6991 actually be the case. Of course, in all cases the client gets an
6992 appropriate error code.
6994 15. If a lookup fails in an ACL condition, a message about the failure may
6995 be available; it is used if testing the ACL cannot continue, because most
6996 such messages specify what the cause of the deferral is. However, some
6997 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6998 that caused an old message to be retained and used if a later statement
6999 caused a defer, replacing the real cause of the deferral.
7001 16. If an IP address had so many PTR records that the DNS lookup buffer
7002 was not large enough to hold them, Exim could crash while trying to process
7003 the truncated data. It now detects and logs this case.
7005 17. Further to 4.21/58, another change has been made: if (and only if) the
7006 first line of a message (the first header line) ends with CRLF, a bare LF
7007 in a subsequent header line has a space inserted after it, so as not to
7008 terminate the header.
7010 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7011 unnecessarily, used atoi() instead of strtol(), and didn't check the
7012 termination when getting file sizes from file names by regex.
7014 19. Completely re-implemented the support for maildirsize files, in the light
7015 of a number of problems with the previous contributed implementation
7016 (4.30/29). In particular:
7018 . If the quota is zero, the maildirsize file is maintained, but no quota is
7021 . If the maildir directory does not exist, it is created before any attempt
7022 to write a maildirsize file.
7024 . The quota value in the file is just a cache; if the quota is changed in
7025 the transport, the new value overrides.
7027 . A regular expression is available for excluding directories from the
7030 20. The autoreply transport checks the characters in options that define the
7031 message's headers; it allows continued headers, but it was checking with
7032 isspace() after an embedded newline instead of explicitly looking for a
7035 21. If all the "regular" hosts to which an address was routed had passed their
7036 expiry times, and had not reached their retry times, the address was
7037 bounced, even if fallback hosts were defined. Now Exim should go on to try
7040 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7041 equivalent code in the SMTP transport. Some hosts send humungous responses
7042 to HELO/EHLO, more than 1024 it seems.
7044 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7045 gives compiler warnings in some environments. I've now done it "properly",
7048 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7049 (because of problems with the built-in one) was declared to return uschar *
7050 instead of char *, causing compiler failure.
7052 25. Fixed a file descriptor leak when processing alias/forward files.
7054 26. Fixed a minor format string issue in dbfn.c.
7056 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7058 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7059 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7062 29. When a sender address is verified, it is cached, to save repeating the test
7063 when there is more than one recipient in a message. However, when the
7064 verification involves a callout, it is possible for different callout
7065 options to be set for different recipients. It is too complicated to keep
7066 track of this in the cache, so now Exim always runs a verification when a
7067 callout is required, relying on the callout cache for the optimization.
7068 The overhead is duplication of the address routing, but this should not be
7071 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7072 to be verified with callout=postmaster, and the main callout worked but the
7073 postmaster check failed, the verification correctly failed. However, if a
7074 subsequent RCPT command asked for sender verification *without* the
7075 postmaster check, incorrect caching caused this verification also to fail,
7078 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7079 it was not caching the DNS options (qualify_single, search_parents) that
7080 were used when the lookup failed. A subsequent lookup with different
7081 options therefore always gave the same answer, though there were cases
7082 where it should not have. (Example: a "domains = !$mx_any" option on a
7083 dnslookup router: the "domains" option is always processed without any
7084 widening, but the router might have qualify_single set.) Now Exim uses the
7085 cached value only when the same options are set.
7087 32. Added John Jetmore's "exipick" utility to the distribution.
7089 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7090 than a timeout (e.g. a certificate is required, and is not provided), an
7091 Exim server now closes the connection immediately. Previously it waited for
7092 the client to close - but if the client is SSL, it seems that they each
7093 wait for each other, leading to a delay before one of them times out.
7095 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7096 maintained 0.8.x compatibility because I don't think many are using it, and
7097 it is clearly obsolete.
7099 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7102 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7103 client certificate was expired. A simple patch fixes this, though I don't
7104 understand the full logic of why the verify callback is called multiple
7107 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7108 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7109 which causes problems with some clients (such as the Certicom SSL Plus
7110 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7111 disables the coutermeasure allowing Eudora to connect."
7113 38. Exim was not checking that a write() to a log file succeeded. This could
7114 lead to Bad Things if a log got too big, in particular if it hit a file
7115 size limit. Exim now panics and dies if it cannot write to a log file, just
7116 as it does if it cannot open a log file.
7118 39. Modified OS/Makefile-Linux so that it now contains
7120 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7122 The two -D definitions ensure that Exim is compiled with large file
7123 support, which makes it possible to handle log files that are bigger than
7126 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7127 instance) a domain was checked against a named list that involved a lookup,
7128 causing $domain_data to be set, then another domain was checked against the
7129 same list, then the first domain was re-checked, the value of $domain_data
7130 after the final check could be wrong. In particular, if the second check
7131 failed, it could be set empty. This bug probably also applied to
7134 41. The strip_trailing_dot option was not being applied to the address given
7135 with the -f command-line option.
7137 42. The code for reading a message's header from the spool was incrementing
7138 $received_count, but never initializing it. This meant that the value was
7139 incorrect (doubled) while delivering a message in the same process in which
7140 it was received. In the most common configuration of Exim, this never
7141 happens - a fresh exec is done - but it can happen when
7142 deliver_drop_privilege is set.
7144 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7145 it now includes up to 150 characters of the unexpected data in the log
7148 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7149 and building data strings. The size of both of these buffers was 10 000
7150 bytes - far larger than anybody would *ever* want, thought I. Needless to
7151 say, somebody hit the limit. I have increased the maximum line length to
7152 20 000 and the maximum data length of concatenated lines to 100 000. I have
7153 also fixed two bugs, because there was no checking on these buffers. Tsk,
7154 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7155 buffer is too small.
7157 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7158 lsearch lookups. Now it does.
7160 46. When parsing a route_list item in a manualroute router, a fixed-length
7161 buffer was used for the list of hosts. I made this 1024 bytes long,
7162 thinking that nobody would ever have a list of hosts that long. Wrong.
7163 Somebody had a whole pile of complicated expansion conditions, and the
7164 string was silently truncated, leading to an expansion error. It turns out
7165 that it is easier to change to an unlimited length (owing to other changes
7166 that have happened since this code was originally written) than to build
7167 structure for giving a limitation error. The length of the item that
7168 expands into the list of hosts is now unlimited.
7170 47. The lsearch lookup could not handle data where the length of text line was
7171 more than 4095 characters. Such lines were truncated, leading to shortened
7172 data being returned. It should now handle lines of any length.
7174 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7175 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7178 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7179 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7180 no longer happens in comment lines. A list of replacements is now placed
7181 at the head of all of the source files, except those whose only change is
7182 to replace PERL_COMMAND in the very first #! line.
7184 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7185 messages on the queue, with a bottom-up merge sort, using code contributed
7186 by Michael Haardt. This should make operations like -bp somewhat faster on
7187 large queues. It won't affect queue runners, except when queue_run_in_order
7190 51. Installed eximstats 1.31 in the distribution.
7192 52. Added support for SRV lookups to the dnslookup router.
7194 53. If an ACL referred to $message_body or $message_body_end, the value was not
7195 reset for any messages that followed in the same SMTP session.
7197 54. The store-handling optimization for building very long strings was not
7198 differentiating between the different store pools. I don't think this
7199 actually made any difference in practice, but I've tidied it.
7201 55. While running the routers to verify a sender address, $sender_address
7202 was still set to the sender address. This is wrong, because when routing to
7203 send a bounce to the sender, it would be empty. Therefore, I have changed
7204 it so that, while verifying a sender address, $sender_address is set to <>.
7205 (There is no change to what happens when verifying a recipient address.)
7207 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7208 target A or AAAA records (if not already returned) without resetting the
7209 qualify_single or search_parents options of the DNS resolver. These are
7210 inappropriate in this case because the targets of MX and SRV records must
7211 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7212 target that, when qualified, matched something in the local domain. These
7213 two options are now turned off when doing these lookups.
7215 57. It seems that at least some releases of Reiserfs (which does not have the
7216 concept of a fixed number of inodes) returns zero and not -1 for the
7217 number of available inodes. This interacted badly with check_spool_inodes,
7218 which assumed that -1 was the "no such thing" setting. What I have done is
7219 to check that the total number of inodes is greater than zero before doing
7220 the test of how many are available.
7222 58. When a "warn" ACL statement has a log_message modifier, the message is
7223 remembered, and not repeated. This is to avoid a lot of repetition when a
7224 message has many recipients that cause the same warning to be written.
7225 However, Exim was preserving the list of already written lines for an
7226 entire SMTP session, which doesn't seem right. The memory is now reset if a
7227 new message is started.
7229 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7230 debugging output unless log_rewrite was also set.
7232 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7233 of (int)(handle) when we know that handle contains (void *)(-1).
7235 61. The Exim daemon panic-logs an error return when it closes the incoming
7236 connection. However "connection reset by peer" seems to be common, and
7237 isn't really an error worthy of noting specially, so that particular error
7240 62. When Exim is trying to find all the local interfaces, it used to panic and
7241 die if the ioctl to get the interface flags failed. However, it seems that
7242 on at least one OS (Solaris 9) it is possible to have an interface that is
7243 included in the list of interfaces, but for which you get a failure error
7244 for this call. This happens when the interface is not "plumbed" into a
7245 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7246 failure of the "get flags" call assumes that the interface is down.
7248 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7249 makes life easier for people who are doing arithmetic on fields extracted
7250 from dates, where you often get leading zeros that should not be
7251 interpreted as octal.
7253 64. Added qualify_domain to the redirect router, to override the global
7256 65. If a pathologically long header line contained very many addresses (the
7257 report of this problem mentioned 10 000) and each of them was rewritten,
7258 Exim could use up a very large amount of memory. (It kept on making new
7259 copies of the header line as it rewrote, and never released the old ones.)
7260 At the expense of a bit more processing, the header rewriting function has
7261 been changed so that it no longer eats memory in this way.
7263 66. The generation of the Received: header has been moved from the time that a
7264 message starts to be received, to the time that it finishes. The timestamp
7265 in the Received: header should now be very close to that of the <= log
7266 line. There are two side-effects of this change:
7268 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7269 logged header lines no longer include the local Received: line, because
7270 it has not yet been created. The same applies to a copy of the message
7271 that is returned to a non-SMTP sender when a message is rejected.
7273 (b) When a filter file is tested using -bf, no additional Received: header
7274 is added to the test message. After some thought, I decided that this
7277 This change does not affect the value of $received_for. It is still set
7278 after address rewriting, but before local_scan() is called.
7280 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7282 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7283 gave an unhelpful panic error message, and a defer error. I have managed to
7284 change this behaviour so that it now rejects any supplied certificate,
7285 which seems right, as the list of acceptable certificates is empty.
7287 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7288 gave an unhelpful defer error. I have not managed to make this reject any
7289 supplied certificates, but the error message it gives is "no certificate
7290 supplied", which is not helpful.
7292 70. exigrep's output now also includes lines that are not associated with any
7293 message, but which match the given pattern. Implemented by a patch from
7294 Martin Sluka, which also tidied up the Perl a bit.
7296 71. Recipient callout verification, like sender verification, was using <> in
7297 the MAIL FROM command. This isn't really the right thing, since the actual
7298 sender may affect whether the remote host accepts the recipient or not. I
7299 have changed it to use the actual sender in the callout; this means that
7300 the cache record is now keyed on a recipient/sender pair, not just the
7301 recipient address. There doesn't seem to be a real danger of callout loops,
7302 since a callout by the remote host to check the sender would use <>.
7303 [SEE ABOVE: changed after hitting problems.]
7305 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7306 temporary errors. However, in the case of such a code being given after
7307 the end of a data transmission (i.e. after ".") Exim was failing to write
7308 a retry record for the message. (Yes, there was some broken host that was
7309 actually sending 8xx at this point.)
7311 73. An unknown lookup type in a host list could cause Exim to panic-die when
7312 the list was checked. (An example that provoked this was putting <; in the
7313 middle of a list instead of at the start.) If this happened during a DATA
7314 ACL check, a -D file could be left lying around. This kind of configuration
7315 error no longer causes Exim to die; instead it causes a defer error. The
7316 incident is still logged to the main and panic logs.
7318 74. Buglet left over from Exim 3 conversion. The message "too many messages
7319 in one connection" was written to the rejectlog but not the mainlog, except
7320 when address rewriting (yes!) was being logged.
7322 75. Added write_rejectlog option.
7324 76. When a system filter was run not as root (that is, when system_filter_user
7325 was set), the values of the $n variables were not being returned to the
7326 main process; thus, they were not subsequently available in the $sn
7329 77. Added +return_path_on_delivery log selector.
7331 78. A connection timeout was being treated differently from recipients deferred
7332 when testing hosts_max_try with a message that was older than the host's
7333 retry timeout. (The host should not be counted, thus allowing all hosts to
7334 be tried at least once before bouncing.) This may have been the cause of an
7335 occasionally reported bug whereby a message would remain on the queue
7336 longer than the retry timeout, but would be bounced if a delivery was
7337 forced. I say "may" because I never totally pinned down the problem;
7338 setting up timeout/retry tests is difficult. See also the next item.
7340 79. The ultimate address timeout was not being applied to errors that involved
7341 a combination of host plus message (for example, a timeout on a MAIL
7342 command). When an address resolved to a number of possible hosts, and they
7343 were not all tried for each delivery (e.g. because of hosts_max_try), a
7344 message could remain on the queue longer than the retry timeout.
7346 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7349 81. Fixed an obscure SMTP outgoing bug which required at least the following
7350 conditions: (a) there was another message waiting for the same server;
7351 (b) the server returned 5xx to all RCPT commands in the first message so
7352 that the message was not completed; (c) the server dropped the connection
7353 or gave a negative response to the RSET that Exim sends to abort the
7354 transaction. The observed case was a dropped connection after DATA that had
7355 been sent in pipelining mode. That is, the server had advertised PIPELINING
7356 but was not implementing it correctly. The effect of the bug was incorrect
7357 behaviour, such as trying another host, and this could lead to a crash.
7363 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7364 and daemon.c were passed as pointers to ints; they should have been
7365 pointers to socklen_t variables (which are typically unsigned ints).
7367 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7370 3. Fixed a really odd bug that affected only the testing scheme; patching a
7371 certain fixed string in the binary changed the value of another string that
7372 happened to be identical to the end of the original first string.
7374 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7375 name", it returns that address as the IP address. On some operating
7376 systems (e.g. Solaris), it also passes back the IP address string as the
7377 "host name". However, on others (e.g. Linux), it passes back an empty
7378 string. Exim wasn't checking for this, and was changing the host name to an
7379 empty string, assuming it had been canonicalized.
7381 5. Although rare, it is permitted to have more than one PTR record for a given
7382 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7383 all the names associated with an address, because they do in Solaris.
7384 However, it seems that they do not in Linux for data that comes from the
7385 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7386 I found this out when I moved to a new Linux workstation and tried to run
7387 the Exim test suite.
7389 To get round this problem I have changed the code so that it now does its
7390 own call to the DNS to look up PTR records when searching for a host name.
7391 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7392 addresses that are only in /etc/hosts are still found.
7394 This behaviour is, however, controlled by an option called host_lookup_
7395 order, which defaults to "bydns:byaddr". If people want to use the other
7396 order, or indeed, just use one or the other means of lookup, they can
7397 specify it in this variable.
7399 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7400 some operating systems, this comes back from gethostbyaddr() as an empty
7401 string, and this is what Exim used to test for. However, it seems that in
7402 other systems, "." is yielded. Exim now tests for this case too.
7404 7. The values of check_spool_space and check_log_space are now held internally
7405 as a number of kilobytes instead of an absolute number of bytes. If a
7406 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7407 kilobyte. This means that much larger values can be stored.
7409 8. Exim monitor: an attempt to get the action menu when not actually pointing
7410 at a message produces an empty menu entitled "No message selected". This
7411 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7412 no entries in it ("Shell widget menu has zero width and/or height"). So I
7413 have added a single, blank menu entry in this case.
7415 9. Added ${quote_local_part.
7417 10. MIME decoding is now applied to the contents of Subject: header lines when
7420 11. Now that a reference to $sender_host_address automatically causes a reverse
7421 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7422 host lookup before query-style lookups in lists that might use this
7423 variable. This has therefore been abolished, and the "net-" prefix is no
7424 longer necessary for query-style lookups.
7426 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7427 have been a typo for LFLAGS, so it has been changed.
7429 13. The install script calls Exim with "-C /dev/null" in order to find the
7430 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7431 to be output. However, since Exim outputs its version number before the
7432 error, it didn't break the script. It just looked ugly. I fixed this by
7433 always allowing "-C /dev/null" if the caller is root.
7435 14. Ignore overlarge ACL variable number when reading spool file - insurance
7436 against a later release with more variables having written the file.
7438 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7439 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7440 this, as well as the form without the "IPv6" on the front.
7442 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7443 OS/Makefile-Darwin file.
7445 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7446 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7448 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7449 variable. However, some OS use ints for inodes. I've added cast to long int
7450 to get rid of the compiler warning.
7452 19. I had forgotten to lock out "/../" in configuration file names when
7453 ALT_CONFIG_PREFIX was set.
7455 20. Routers used for verification do not need to specify transports. However,
7456 if such a router generated a host list, and callout was configured, Exim
7457 crashed, because it could not find a port number from the (non-existent)
7458 transport. It now assumes port 25 in this circumstance.
7460 21. Added the -t option to exigrep.
7462 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7463 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7464 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7465 them is set, LOOKUP_LSEARCH is forced.
7467 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7469 24. Added sender and host information to the "rejected by local_scan()" log
7470 line; previously there was no indication of these.
7472 25. Added .include_if_exists.
7474 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7475 Linux. It turns out that not all file systems support this. Apparently some
7476 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7477 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7478 not supported on the file descriptor, is now ignored when Exim is trying to
7479 sync a directory. This applies only to Linux.
7481 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7483 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7484 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7487 29. Added support for maildirsize files from supplied patch (modified a bit).
7489 30. The use of :fail: followed by an empty string could lead Exim to respond to
7490 sender verification failures with (e.g.):
7492 550 Verification failed for <xxx>
7493 550 Sender verify failed
7495 where the first response line was missing the '-' that indicates it is not
7496 the final line of the response.
7498 31. The loop for finding the name of the user that called Exim had a hardwired
7499 limit of 10; it now uses the value of finduser_retries, which is used for
7500 all other user lookups.
7502 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7505 33. Exim was neglecting to zero errno before one call of strtol() when
7506 expanding a string and expecting an integer value. On some systems this
7507 resulted in spurious "integer overflow" errors. Also, it was casting the
7508 result into an int without checking.
7510 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7511 did not work. The code looks as if it has *never* worked, though it appears
7512 to have been documented since at least release 1.62. I have made it work.
7514 35. The "timeout_DNS" error in retry rules, also documented since at least
7515 1.62, also never worked. As it isn't clear exactly what this means, and
7516 clearly it isn't a major issue, I have abolished the feature by treating it
7517 as "timeout", and writing a warning to the main and panic logs.
7519 36. The display of retry rules for -brt wasn't always showing the error code
7522 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7523 timeout_connect_A, timeout_connect_MX.
7525 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7526 to the empty sender.
7528 39. The daemon was not analysing the content of -oX till after it had closed
7529 stderr and disconnected from the controlling terminal. This meant that any
7530 syntax errors were only noted on the panic log, and the return code from
7531 the command was 0. By re-arranging the code a little, I've made the
7532 decoding happen first, so such errors now appear on stderr, and the return
7533 code is 1. However, the actual setting up of the sockets still happens in
7534 the disconnected process, so errors there are still only recorded on the
7537 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7538 connections (as happens on some IP stacks) was logged at start up time as
7539 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7540 it from "IPv6 and IPv4", which means that two separate sockets are being
7543 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7544 says whether AF_INET or AF_INET6 was passed as an argument.
7546 42. Exiwhat output was messed up when time zones were included in log
7549 43. Exiwhat now gives more information about the daemon's listening ports,
7550 and whether -tls-on-connect was used.
7552 44. The "port" option of the smtp transport is now expanded.
7554 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7555 silently ignored. Now an error message is written to the main and panic
7558 46. There's a new ACL modifier called "logwrite" which writes to a log file
7559 as soon as it is encountered.
7561 47. Added $local_user_uid and $local_user_gid at routing time.
7563 48. Exim crashed when trying to verify a sender address that was being
7566 49. Exim was recognizing only a space character after ".include". It now also
7567 recognizes a tab character.
7569 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7570 extracting the relevant information from the specification. The man page no
7571 longer contains scrambled data for the -d option, and I've added a section
7572 at the front about calling Exim under different names.
7574 51. Added "extra_headers" argument to the "mail" command in filter files.
7576 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7579 53. Installed eximstats 1.29.
7581 54. Added transport_filter_timeout as a generic transport option.
7583 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7584 Cc: header lines. This was required by RFC 822, but it not required by RFC
7587 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7588 incoming messages that did not have them. Now it does so only if the
7589 message originates locally, that is, if there is no associated remote host
7590 address. When Resent- header lines are present, this applies to the Resent-
7591 lines rather than the non-Resent- lines.
7593 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7594 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7596 58. Messages for configuration errors now include the name of the main
7597 configuration file - useful now that there may be more than one file in a
7598 list (.included file names were always shown).
7600 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7601 for those rare installations that do not start the daemon as root or run it
7602 setuid root. I've cut out the call to initgroups() if the daemon is not
7605 60. The Exim user and group can now be bound into the binary as text strings
7606 that are looked up at the start of Exim's processing.
7608 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7610 62. Added $mailstore_basename variable.
7612 63. Installed patch to sieve.c from Michael Haardt.
7614 64. When Exim failed to open the panic log after failing to open the main log,
7615 the original message it was trying to log was written to stderr and debug
7616 output, but if they were not available (the usual case in production), it
7617 was lost. Now it is written to syslog before the two lines that record the
7618 failures to open the logs.
7620 65. Users' Exim filters run in subprocesses under the user's uid. It is
7621 possible for a "deliver" command or an alias in a "personal" command to
7622 provoke an address rewrite. If logging of address rewriting is configured,
7623 this fails because the process is not running as root or exim. There may be
7624 a better way of dealing with this, but for the moment (because 4.30 needs
7625 to be released), I have disabled address rewrite logging when running a
7626 filter in a non-root, non-exim process.
7632 1. The buildconfig auxiliary program wasn't quoting the value set for
7633 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7634 not defined. This bug was masked in 4.22 by the effect that was fixed in
7637 2. Some messages that were rejected after a message id was allocated were
7638 shown as "incomplete" by exigrep. It no longer does this for messages that
7639 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7641 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7642 have allow_domain_literals set, the ID did not get logged in the <= line.
7643 Domain literals are now always recognized in Message-ID: header lines.
7645 4. The first argument for a ${extract expansion item is the key name or field
7646 number. Leading and trailing spaces in this item were not being ignored,
7647 causing some misleading effects.
7649 5. When deliver_drop_privilege was set, single queue runner processes started
7650 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7651 same command in the process it spins off) were not dropping privilege.
7653 6. When the daemon running as "exim" started a queue runner, it always
7654 re-executed Exim in the spun-off process. This is a waste of effort when
7655 deliver_drop_privilege is set. The new process now just calls the
7656 queue-runner function directly.
7662 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7665 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7666 ignored. Though the use of -oP was forcing the writing of a pid file, it
7667 was always written to the default place.
7669 3. If the message "no IP address found for host xxxx" is generated during
7670 incoming verification, it is now followed by identification of the incoming
7671 connection (so you can more easily find what provoked it).
7673 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7675 5. Added some features to "harden" Exim a bit more against certain attacks:
7677 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7678 be put in Local/Makefile. This is like the never_users runtime option,
7679 but it cannot be overridden. The default setting is "root".
7681 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7682 prefix string with which any file named in a -C command line option
7685 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7686 is retained for -C and -D only if the caller of Exim is root. Without
7687 it, the exim user may also use -C and -D and retain privilege.
7689 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7690 command line option is disabled.
7692 6. Macro names set by the -D option must start with an upper case letter, just
7693 like macro names defined in the configuration file.
7695 7. Added "dereference=" facility to LDAP.
7697 8. Two instances of the typo "uknown" in the source files are fixed.
7699 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7700 the Configure-Makefile script screwed up while processing it.
7702 10. Incorporated PCRE 4.4.
7704 11. The SMTP synchronization check was not operating right at the start of an
7705 SMTP session. For example, it could not catch a HELO sent before the client
7706 waited for the greeting. There is now a check for outstanding input at the
7707 point when the greeting is written. Because of the duplex, asynchronous
7708 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7709 way, but not yet received, when the check is performed.
7711 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7712 on TCP/IP sockets, because this apparently causes some broken clients to
7715 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7716 unchanged) from the Cygwin maintainer.
7718 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7719 was supported instead of testing for mbx. Effectively a typo.
7721 15. The spa authenticator server code was not checking that the input it
7722 received was valid base64.
7724 16. The debug output line for the "set" modifier in ACLs was not showing the
7725 name of the variable that was being set.
7727 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7729 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7730 lookup on its own. Something else was needed to trigger the lookup. For
7731 example, a match in host_lookup or the need for a host name in a host list.
7732 Now, if $sender_host_name is referenced and the host name has not yet been
7733 looked up, a lookup is performed. If the lookup fails, the variable remains
7734 empty, and $host_lookup_failed is set to "1".
7736 19. Added "eqi" as a case-independent comparison operator.
7738 20. The saslauthd authentication condition could segfault if neither service
7739 nor realm was specified.
7741 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7742 error message that was logged was misleading, and incoming SMTP
7743 connections were dropped. The message is now more accurate, and temporary
7744 errors are given to SMTP connections.
7746 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7747 (except RSET) with a 421 error, until QUIT is received. However, it was
7748 failing to send a response to QUIT.
7750 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7751 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7752 ACL is now run after the helo_try_verify_hosts code.
7754 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7755 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7756 case-independent, so other case variants are also recognized). Apparently
7757 some systems use these upper case variants.
7759 25. If more than two messages were waiting for the same host, and a transport
7760 filter was specified for the transport, Exim sent two messages over the
7761 same TCP/IP connection, and then failed with "socket operation on non-
7762 socket" when it tried to send the third.
7764 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7766 27. The extern definition of crypt16() in expand.c was not being excluded when
7767 the OS had its own crypt16() function.
7769 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7770 as a preferred synonym for return_size_limit, both as an option and as an
7773 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7775 30. Changed the default configuration ACL to relax the local part checking rule
7776 for addresses that are not in any local domains. For these addresses,
7777 slashes and pipe symbols are allowed within local parts, but the sequence
7778 /../ is explicitly forbidden.
7780 31. SPA server authentication was not clearing the challenge buffer before
7783 32. log_message in a "warn" ACL statement was writing to the reject log as
7784 well as to the main log, which contradicts the documentation and doesn't
7785 seem right (because no rejection is happening). So I have stopped it.
7787 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7788 However, I am unable to do any testing of this.
7790 34. Fixed an infelicity in the appendfile transport. When checking directories
7791 for a mailbox, to see if any needed to be created, it was accidentally
7792 using path names with one or more superfluous leading slashes; tracing
7793 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7795 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7796 contents are added to the log line that is written for every discarded
7797 recipient. (Previously a log_message setting was ignored.)
7799 36. The ${quote: operator now quotes the string if it is empty.
7801 37. The install script runs exim in order to find its version number. If for
7802 some reason other than non-existence or emptiness, which it checks, it
7803 could not run './exim', it was installing it with an empty version number,
7804 i.e. as "exim-". This error state is now caught, and the installation is
7807 38. An argument was missing from the function that creates an error message
7808 when Exim fails to connect to the socket for saslauthd authentication.
7809 This could cause Exim to crash, or give a corrupted message.
7811 39. Added isip, isip4, and isip6 to ${if conditions.
7813 40. The ACL variables $acl_xx are now saved with the message, and can be
7814 accessed later in routers, transports, and filters.
7816 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7817 strings in the file are not string-expanded.
7819 42. If a MAIL command specified a SIZE value that was too large to fit into an
7820 int variable, the check against message_size_limit failed. Such values are
7821 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7822 day this will have to be increased, but I don't think I want to be around
7823 when emails are that large.
7830 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7831 iconv() is not standard in FreeBSD.
7833 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7834 IPv6 enabled. The observed symptom was a segmentation fault on return from
7835 the function os_common_find_running_interfaces() in src/os.c.
7837 3. In the check_special_case() function in daemon.c I had used "errno" as an
7838 argument name, which causes warnings on some systems. This was basically a
7839 typo, since it was named "eno" in the comments!
7841 4. The code that waits for the clock to tick (at a resolution of some fraction
7842 of a second) so as to ensure message-id uniqueness was always waiting for
7843 at least one whole tick, when it could have waited for less. [This is
7844 almost certainly not relevant at current processor speeds, where it is
7845 unlikely to ever wait at all. But we try to future-proof.]
7847 5. The function that sleeps for a time interval that includes fractions of a
7848 second contained a race. It did not block SIGALRM between setting the
7849 timer, and suspending (a couple of lines later). If the interval was short
7850 and the sigsuspend() was delayed until after it had expired, the suspension
7851 never ended. On busy systems this could lead to processes getting stuck for
7854 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7855 process, before it forks any delivery processes. The open lookup caching
7856 mechanism meant that the open file or database connection was passed into
7857 the delivery process. The problem was that delivery processes always tidy
7858 up cached lookup data. This could cause a problem for the next delivery
7859 process started by the queue runner, because the external queue runner
7860 process does not know about the closure. So the next delivery process
7861 still has data in the lookup cache. In the case of a file lookup, there was
7862 no problem because closing a file descriptor in a subprocess doesn't affect
7863 the parent. However, if the lookup was caching a connection to a database,
7864 the connection was closed, and the second delivery process was likely to
7865 see errors such as "PGSQL: query failed: server closed the connection
7866 unexpectedly". The problem has been fixed by closing all cached lookups
7867 in a queue runner before running a delivery process.
7869 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7870 seem to have the "const" qualifier which it has on other OS. I've
7873 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7874 *of the same type* (client or server) with the same public name that an
7875 error should be diagnosed.
7877 9. When Exim looked up a host name for an IP address, but failed to find the
7878 original IP address when looking up the host name (a safety check), it
7879 output the message "<ip address> does not match any IP for NULL", which was
7880 confusing, to say the least. The bug was that the host name should have
7881 appeared instead of "NULL".
7883 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7884 user that is built into the binary, and the -C or -D options is used, root
7885 privilege is dropped before the configuration file is read. In addition,
7886 logging is switched to stderr instead of the normal log files. If the
7887 configuration then re-defines the Exim user, the unprivileged environment
7888 is probably not what is expected, so Exim logs a panic warning message (but
7891 However, if deliver_drop_privilege is set, the unprivileged state may well
7892 be exactly what is intended, so the warning has been cut out in that case,
7893 and Exim is allowed to try to write to its normal log files.
7899 1. smtp_return_error_details was not giving details for temporary sender
7900 or receiver verification errors.
7902 2. Diagnose a configuration error if two authenticators have the same public
7905 3. Exim used not to create the message log file for a message until the first
7906 delivery attempt. This could be confusing when incoming messages were held
7907 for policy or load reasons. The message log file is now created at the time
7908 the message is received, and an initial "Received" line is written to it.
7910 4. The automatically generated man page for command line options had a minor
7911 bug that caused no ill effects; however, a more serious problem was that
7912 the procedure for building the man page automatically didn't always
7913 operate. Consequently, release 4.20 contains an out-of-date version. This
7914 shouldn't happen again.
7916 5. When building Exim with embedded Perl support, the script that builds the
7917 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7918 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7920 6. The freeze_tell option was not being used for messages that were frozen on
7921 arrival, either by an ACL or by local_scan().
7923 7. Added the smtp_incomplete_transaction log selector.
7925 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7926 was accepting AUTH without a new EHLO.
7928 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7929 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7932 10. Logging of TCP/IP connections (when configured) now happens in the main
7933 daemon process instead of the child process, so that the TCP/IP connection
7934 count is more accurate (but it can never be perfect).
7936 11. The use of "drop" in a nested ACL was not being handled correctly in the
7937 outer ACL. Now, if condition failure induced by the nested "drop" causes
7938 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7939 or "require"), the connection is dropped.
7941 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7942 that yield "discard" can now be used with an "accept" or a "discard" verb,
7943 but an error is generated for any others (because I can't see a useful way
7944 to define what should happen).
7946 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7947 are now processed in the same way as lines in the Exim configuration file.
7948 In particular, continuation lines are supported.
7950 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7952 15. Added -ti meaning -t -i.
7954 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7955 domains, and warn by logging if others are found.
7957 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7958 returned from GIFCONF when Exim is trying to find the list of interfaces on
7959 a host. The code in os.c has been modified to copy each ifreq to an aligned
7960 structure in all cases.
7962 Also, in some cases, the returned ifreq's were being copied to a 'struct
7963 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7964 means the last couple of bytes of an IPv6 address could be chopped if the
7965 ifreq contained only a normal sockaddr (14 bytes storage).
7967 18. Named domain lists were not supported in the hosts_treat_as_local option.
7968 An entry such as +xxxx was not recognized, and was treated as a literal
7971 19. Ensure that header lines added by a DATA ACL are included in the reject log
7972 if the ACL subsequently rejects the message.
7974 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7975 MD5 (which is deprecated).
7977 21. When testing a filter file using -bf, Exim was writing a message when it
7978 took the sender from a "From " line in the message, but it was not doing so
7979 when it took $return_path from a Return-Path: header line. It now does.
7981 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7982 with a valid header line field name (a series of printing characters
7983 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7985 23. Changed "disc" in the source to "disk" to conform to the documentation and
7986 the book and for uniformity.
7988 24. Ignore Sendmail's -Ooption=value command line item.
7990 25. When execve() failed while trying to run a command in a pipe transport,
7991 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7992 could be confused with a return value of 69 from the command itself. This
7993 has been changed to 127, the value the shell returns if it is asked to run
7994 a non-existent command. The wording for the related log line suggests a
7995 non-existent command as the problem.
7997 26. If received_header_text expands to an empty string, do not add a Received:
7998 header line to the message. (Well, it adds a token one on the spool, but
7999 marks it "old" so that it doesn't get used or transmitted.)
8001 27. Installed eximstats 1.28 (addition of -nt option).
8003 28. There was no check for failure on the call to getsockname() in the daemon
8004 code. This can fail if there is a shortage of resources on the system, with
8005 ENOMEM, for example. A temporary error is now given on failure.
8007 29. Contrary to the C standard, it seems that in some environments, the
8008 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8009 program. Exim now does this explicitly; it affects the formatting of
8010 timestamps using strftime().
8012 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8013 complaints. I've now initialized all the variables, to avoid this.
8015 32. Header lines added by a system filter were not being "seen" during
8016 transport-time rewrites.
8018 33. The info_callback() function passed to OpenSSL is set up with type void
8019 (*)(SSL *, int, int), as described somewhere. However, when calling the
8020 function (actually a macro) that sets it up, the type void(*)() is
8021 expected. I've put in a cast to prevent warnings from picky compilers.
8023 34. If a DNS black list lookup found a CNAME record, but there were no A
8024 records associated with the domain it pointed at, Exim crashed.
8026 35. If a DNS black list lookup returned more than one A record, Exim ignored
8027 all but the first. It now scans all returned addresses if a particular IP
8028 value is being sought. In this situation, the contents of the
8029 $dnslist_value variable are a list of all the addresses, separated by a
8032 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8033 to accept a host name and all its aliases if the forward lookup for any of
8034 them yielded the IP address of the incoming connection. Now it accepts only
8035 those names whose forward lookup yields the correct IP address. Any other
8036 names are discarded. This closes a loophole whereby a rogue DNS
8037 administrator could create reverse DNS records to break through a
8038 wildcarded host restriction in an ACL.
8040 37. If a user filter or a system filter that ran in a subprocess used any of
8041 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8042 the wrong values were passed to the pipe command ($thisaddress had the
8043 value of $0, $0 had the value of $1, etc). This bug was introduced by
8044 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8046 38. Improved the line breaking for long SMTP error messages from ACLs.
8047 Previously, if there was no break point between 40 and 75 characters, Exim
8048 left the rest of the message alone. Two changes have been made: (a) I've
8049 reduced the minimum length to 35 characters; (b) if it can't find a break
8050 point between 35 and 75 characters, it looks ahead and uses the first one
8051 that it finds. This may give the occasional overlong line, but at least the
8052 remaining text gets split now.
8054 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8055 file descriptors might be low, and that setting 1000 would always raise it.
8056 It turns out that in some environments, the limit is already over 1000 and
8057 that lowering it causes trouble. So now Exim takes care not to decrease it.
8059 40. When delivering a message, the value of $return_path is set to $sender_
8060 address at the start of routing (routers may change the value). By an
8061 oversight, this default was not being set up when an address was tested by
8062 -bt or -bv, which affected the outcome if any router or filter referred to
8065 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8066 log only when "message" or "log_message" are set. However, if one of the
8067 conditions was an address verification, or a call to a nested ACL, the
8068 messages generated by the underlying test were being passed through. This
8069 no longer happens. The underlying message is available in $acl_verify_
8070 message for both "message" and "log_message" expansions, so it can be
8071 passed through if needed.
8073 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8074 new expansion $bh_ to give the encoded byte string without charset
8075 translation. Translation happens only if iconv() is available; HAVE_ICONV
8076 indicates this at build time. HEADERS_CHARSET gives the charset to
8077 translate to; headers_charset can change it in the configuration, and
8078 "headers charset" can change it in an individual filter file.
8080 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8081 that creates RFC 2047 encoded "words" labels them as that charset instead
8082 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8083 expansion operator; (ii) when Exim creates a From: line for a local
8084 message; (iii) when a header line is rewritten to include a "phrase" part.
8086 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8087 buggy, causing it to skip the first lines of messages whose message ID
8088 ended in 'D'. This would not have bitten before Exim release 4.14, because
8089 message IDs were unlikely to end in 'D' before then. The effect was to have
8090 incorrect size information for certain domains.
8092 45. #include "config.h" was missing at the start of the crypt16.c module. This
8093 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8096 46. If there was a timeout during a "random" callout check, Exim treated it as
8097 a failure of the random address, and carried on sending RSET and the real
8098 address. If the delay was just some slowness somewhere, the response to the
8099 original RCPT would be taken as a response to RSET and so on, causing
8100 mayhem of various kinds.
8102 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8103 when I implemented it. It didn't allow for the fact that some option values
8104 may legitimately be negative (e.g. size_addition), and it didn't even do
8105 the right test for positive values.
8107 48. Domain names in DNS records are case-independent. Exim always looks them up
8108 in lower case. Some resolvers return domain names in exactly the case they
8109 appear in the zone file, that is, they may contain uppercase letters. Not
8110 all resolvers do this - some return always lower case. Exim was treating a
8111 change of case by a resolver as a change of domain, similar to a widening
8112 of a domain abbreviation. This triggered its re-routing code and so it was
8113 trying to route what was effectively the same domain again. This normally
8114 caused routing to fail (because the router wouldn't handle the domain
8115 twice). Now Exim checks for this case specially, and just changes the
8116 casing of the domain that it ultimately uses when it transmits the message
8119 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8122 50. If a filter generated a file delivery with a non-absolute name (possible if
8123 no home directory exists for the router), the forbid_file option was not
8126 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8127 the existing equality matching.
8129 52. Exim was using ints instead of ino_t variables in some places where it was
8130 dealing with inode numbers.
8132 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8133 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8134 called TMPDIR, and if it finds it is different, it changes its value.
8136 54. The smtp_printf() function is now made available to local_scan() so
8137 additional output lines can be written before returning. There is also an
8138 smtp_fflush() function to enable the detection of a dropped connection.
8139 The variables smtp_input and smtp_batched_input are exported to
8142 55. Changed the default runtime configuration: the message "Unknown user"
8143 has been removed from the ACL, and instead placed on the localuser router,
8144 using the cannot_route_message feature. This means that any verification
8145 failures that generate their own messages won't get overridden. Similarly,
8146 the "Unrouteable address" message that was in the ACL for unverifiable
8147 relay addresses has also been removed.
8149 56. Added hosts_avoid_esmtp to the smtp transport.
8151 57. The exicyclog script was not checking for the esoteric option
8152 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8153 will work only if exicyclog is run under the appropriate euid.
8155 58. Following a discussion on the list, the rules by which Exim recognises line
8156 endings on incoming messages have been changed. The -dropcr and drop_cr
8157 options are now no-ops, retained only for backwards compatibility. The
8158 following line terminators are recognized: LF CRLF CR. However, special
8159 processing applies to CR:
8161 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8162 nor a local message in the state where . is a terminator.
8164 (ii) If a bare CR is encountered in a header line, an extra space is added
8165 after the line terminator so as not to end the header. The reasoning
8166 behind this is that bare CRs in header lines are most likely either
8167 to be mistakes, or people trying to play silly games.
8169 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8170 was being incorrectly given as 18 bytes larger than it should have been.
8171 This is a VOB (very old bug).
8173 60. This may never have affected anything current, but just in case it has:
8174 When the local host is found other than at the start of a list of hosts,
8175 the local host, those with the same MX, and any that follow, are discarded.
8176 When the list in question was part of a longer list of hosts, the following
8177 hosts (not currently being processed) were also being discarded. This no
8178 longer happens. I'm not sure if this situation could ever has previously
8181 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8184 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8185 header. This is something that is recommended in a new Internet Draft, and
8186 is something that is documented as being done by Sendmail. There are two
8187 possible values. For messages generated by the autoreply transport, Exim
8190 Auto-Submitted: auto-replied
8192 whereas for all other generated messages (e.g. bounces) it adds
8194 Auto-Submitted: auto-generated
8196 63. The "personal" condition in filters now includes a test for the
8197 Auto-Submitted: header. If it contains the string "auto-" the message it
8198 not considered personal.
8200 64. Added rcpt_include_affixes as a generic transport option.
8202 65. Added queue_only_override (default true).
8204 66. Added the syslog_duplication option.
8206 67. If what should have been the first header line of a message consisted of
8207 a space followed by a colon, Exim was mis-interpreting it as a header line.
8208 It isn't of course - it is syntactically invalid and should therefore be
8209 treated as the start of the message body. The misbehaviour could have
8210 caused a number of strange effects, including loss of data in subsequent
8211 header lines, and spool format errors.
8213 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8214 client host had authenticated. This control can now be exercised by an ACL
8215 for more flexibility.
8217 69. By default, callouts do not happen when testing with -bh. There is now a
8218 variant, -bhc, which does actually run the callout code, including
8219 consulting and updating the callout cache.
8221 70. Added support for saslauthd authentication, courtesy of Alexander
8224 71. If statvfs() failed on the spool or log directories while checking their
8225 size for availability, Exim confusingly gave the error "space shortage".
8226 Furthermore, in debugging mode it crashed with a floating point exception.
8227 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8228 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8229 serious problem, Exim now writes to the main and panic logs when this
8230 happens, with details of the failure. It then refuses to accept the
8231 incoming message, giving the message "spool directory problem" or "log
8232 directory problem" with a 421 code for SMTP messages.
8234 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8235 0, 1, and 2 exist, because some OS complain for execs without them (see
8236 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8237 descriptors. However, the code omitted to check that the open succeeded,
8238 causing mysterious errors if for some reason the permissions on /dev/null
8239 got screwed. Now Exim writes a message to the main and panic logs, and
8240 bombs out if it can't open /dev/null.
8242 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8243 interact so that it is all more flexible. It is supposed to remain
8244 backwards compatible. Also added extra_local_interfaces.
8246 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8247 to bomb out with an assertion failure - to the client this appears as a
8248 connection drop. This problem occurs in the part of the code that was taken
8249 from the Samba project. Fortunately, the assertion is in a very simple
8250 function, so I have fixed this by reproducing the function inline in the
8251 one place where it is called, and arranging for authentication to fail
8252 instead of killing the process with assert().
8254 75. The SPA client code was not working when the server requested OEM rather
8255 than Unicode encoding.
8257 76. Added code to make require_files with a specific uid setting more usable in
8258 the case where statting the file as root fails - usually a non-root-mounted
8259 NFS file system. When this happens and the failure is EACCES, Exim now
8260 forks a subprocess and does the per-uid checking as the relevant uid.
8262 77. Added process_log_path.
8264 78. If log_file_path was not explicitly set, a setting of check_log_space or
8265 check_log_inodes was ignored.
8267 79. If a space check for the spool or log partitions fails, the incident is now
8268 logged. Of course, in the latter case the data may get lost...
8270 80. Added the %p formatting code to string_format() so that it can be used to
8271 print addresses in debug_print(). Adjusted all the address printing in the
8272 debugging in store.c to use %p rather than %d.
8274 81. There was a concern that a line of code in smtp_in.c could overflow a
8275 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8276 initially expressed, the concern was not well-founded, because trailing
8277 spaces are removed early. However, if the trailing spaces were followed by
8278 a NULL, they did not get removed, so the overflow was possible. Two fixes
8281 (a) I re-wrote the offending code in a cleaner fashion.
8282 (b) If an incoming SMTP command contains a NULL character, it is rejected
8285 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8286 runs initgroups(), so that if the Exim user is in any additional groups,
8287 they will be used during message reception.
8293 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob