Merge branch 'dbmjz'
[exim.git] / doc / doc-txt / NewStuff
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1New Features in Exim
2--------------------
3
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4This file contains descriptions of new features that have been added to Exim.
5Before a formal release, there may be quite a lot of detail so that people can
6test from the snapshots or the CVS before the documentation is updated. Once
7the documentation is updated, this file is reduced to a short list.
8
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9Version 4.78
10------------
11
12 1. New authenticator driver, "gsasl". Server-only (at present).
13 This is a SASL interface, licensed under GPL, which can be found at
14 http://www.gnu.org/software/gsasl/.
15 This system does not provide sources of data for authentication, so
16 careful use needs to be made of the conditions in Exim. Note that
17 this can not yet be used as a drop-in replacement for Cyrus SASL, as
18 Exim is currently unable to construct strings with embedded NULs for
19 use as keys in lookups against sasldb2.
20
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21 2. New authenticator driver, "heimdal_gssapi". Server-only.
22 A replacement for using cyrus_sasl with Heimdal, now that $KRB5_KTNAME
23 is no longer honoured for setuid programs by Heimdal. Use the
24 "server_keytab" option to point to the keytab.
25
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26 3. The "pkg-config" system can now be used when building Exim to reference
27 cflags and library information for lookups and authenticators, rather
28 than having to update "CFLAGS", "AUTH_LIBS", "LOOKUP_INCLUDE" and
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29 "LOOKUP_LIBS" directly. Similarly for handling the TLS library support
30 without adjusting "TLS_INCLUDE" and "TLS_LIBS".
252e0c7b 31
f1e05cc7 32 4. New expansion variable $tls_bits.
20aa9dbd 33
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34 5. New lookup type, "dbmjz". Key is an Exim list, the elements of which will
35 be joined together with ASCII NUL characters to construct the key to pass
36 into the DBM library.
37
c1e794ba 38
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39Version 4.77
40------------
41
42 1. New options for the ratelimit ACL condition: /count= and /unique=.
43 The /noupdate option has been replaced by a /readonly option.
44
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45 2. The SMTP transport's protocol option may now be set to "smtps", to
46 use SSL-on-connect outbound.
47
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48 3. New variable $av_failed, set true if the AV scanner deferred; ie, when
49 there is a problem talking to the AV scanner, or the AV scanner running.
50
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51 4. New expansion conditions, "inlist" and "inlisti", which take simple lists
52 and check if the search item is a member of the list. This does not
53 support named lists, but does subject the list part to string expansion.
54
55 5. Unless the new EXPAND_LISTMATCH_RHS build option is set when Exim was
56 built, Exim no longer performs string expansion on the second string of
57 the match_* expansion conditions: "match_address", "match_domain",
58 "match_ip" & "match_local_part". Named lists can still be used.
59
7c6d71af 60
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61Version 4.76
62------------
63
64 1. The global option "dns_use_edns0" may be set to coerce EDNS0 usage on
65 or off in the resolver library.
66
67
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68Version 4.75
69------------
70
71 1. In addition to the existing LDAP and LDAP/SSL ("ldaps") support, there
72 is now LDAP/TLS support, given sufficiently modern OpenLDAP client
73 libraries. The following global options have been added in support of
74 this: ldap_ca_cert_dir, ldap_ca_cert_file, ldap_cert_file, ldap_cert_key,
75 ldap_cipher_suite, ldap_require_cert, ldap_start_tls.
76
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77 2. The pipe transport now takes a boolean option, "freeze_signal", default
78 false. When true, if the external delivery command exits on a signal then
79 Exim will freeze the message in the queue, instead of generating a bounce.
80
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81 3. Log filenames may now use %M as an escape, instead of %D (still available).
82 The %M pattern expands to yyyymm, providing month-level resolution.
83
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84 4. The $message_linecount variable is now updated for the maildir_tag option,
85 in the same way as $message_size, to reflect the real number of lines,
86 including any header additions or removals from transport.
87
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88 5. When contacting a pool of SpamAssassin servers configured in spamd_address,
89 Exim now selects entries randomly, to better scale in a cluster setup.
90
bc19a55b 91
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92Version 4.74
93------------
94
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95 1. SECURITY FIX: privilege escalation flaw fixed. On Linux (and only Linux)
96 the flaw permitted the Exim run-time user to cause root to append to
97 arbitrary files of the attacker's choosing, with the content based
98 on content supplied by the attacker.
99
100 2. Exim now supports loading some lookup types at run-time, using your
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101 platform's dlopen() functionality. This has limited platform support
102 and the intention is not to support every variant, it's limited to
103 dlopen(). This permits the main Exim binary to not be linked against
104 all the libraries needed for all the lookup types.
105
106
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107Version 4.73
108------------
109
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110 NOTE: this version is not guaranteed backwards-compatible, please read the
111 items below carefully
112
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113 1. A new main configuration option, "openssl_options", is available if Exim
114 is built with SSL support provided by OpenSSL. The option allows
115 administrators to specify OpenSSL options to be used on connections;
116 typically this is to set bug compatibility features which the OpenSSL
117 developers have not enabled by default. There may be security
118 consequences for certain options, so these should not be changed
119 frivolously.
120
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121 2. A new pipe transport option, "permit_coredumps", may help with problem
122 diagnosis in some scenarios. Note that Exim is typically installed as
123 a setuid binary, which on most OSes will inhibit coredumps by default,
43236f35 124 so that safety mechanism would have to be overridden for this option to
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125 be able to take effect.
126
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127 3. ClamAV 0.95 is now required for ClamAV support in Exim, unless
128 Local/Makefile sets: WITH_OLD_CLAMAV_STREAM=yes
129 Note that this switches Exim to use a new API ("INSTREAM") and a future
130 release of ClamAV will remove support for the old API ("STREAM").
131
132 The av_scanner option, when set to "clamd", now takes an optional third
133 part, "local", which causes Exim to pass a filename to ClamAV instead of
134 the file content. This is the same behaviour as when clamd is pointed at
135 a Unix-domain socket. For example:
136
137 av_scanner = clamd:192.0.2.3 1234:local
138
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139 ClamAV's ExtendedDetectionInfo response format is now handled.
140
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141 4. There is now a -bmalware option, restricted to admin users. This option
142 takes one parameter, a filename, and scans that file with Exim's
143 malware-scanning framework. This is intended purely as a debugging aid
144 to ensure that Exim's scanning is working, not to replace other tools.
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145 Note that the ACL framework is not invoked, so if av_scanner references
146 ACL variables without a fallback then this will fail.
8544e77a 147
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148 5. There is a new expansion operator, "reverse_ip", which will reverse IP
149 addresses; IPv4 into dotted quad, IPv6 into dotted nibble. Examples:
150
151 ${reverse_ip:192.0.2.4}
152 -> 4.2.0.192
153 ${reverse_ip:2001:0db8:c42:9:1:abcd:192.0.2.3}
154 -> 3.0.2.0.0.0.0.c.d.c.b.a.1.0.0.0.9.0.0.0.2.4.c.0.8.b.d.0.1.0.0.2
155
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156 6. There is a new ACL control called "debug", to enable debug logging.
157 This allows selective logging of certain incoming transactions within
158 production environments, with some care. It takes two options, "tag"
159 and "opts"; "tag" is included in the filename of the log and "opts"
160 is used as per the -d<options> command-line option. Examples, which
161 don't all make sense in all contexts:
162
163 control = debug
164 control = debug/tag=.$sender_host_address
165 control = debug/opts=+expand+acl
166 control = debug/tag=.$message_exim_id/opts=+expand
167
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168 7. It has always been implicit in the design and the documentation that
169 "the Exim user" is not root. src/EDITME said that using root was
170 "very strongly discouraged". This is not enough to keep people from
171 shooting themselves in the foot in days when many don't configure Exim
172 themselves but via package build managers. The security consequences of
173 running various bits of network code are severe if there should be bugs in
174 them. As such, the Exim user may no longer be root. If configured
175 statically, Exim will refuse to build. If configured as ref:user then Exim
176 will exit shortly after start-up. If you must shoot yourself in the foot,
177 then henceforth you will have to maintain your own local patches to strip
178 the safeties off.
179
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180 8. There is a new expansion operator, bool_lax{}. Where bool{} uses the ACL
181 condition logic to determine truth/failure and will fail to expand many
182 strings, bool_lax{} uses the router condition logic, where most strings
183 do evaluate true.
184 Note: bool{00} is false, bool_lax{00} is true.
185
186 9. Routers now support multiple "condition" tests,
532be449 187
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18810. There is now a runtime configuration option "tcp_wrappers_daemon_name".
189 Setting this allows an admin to define which entry in the tcpwrappers
190 config file will be used to control access to the daemon. This option
191 is only available when Exim is built with USE_TCP_WRAPPERS. The
192 default value is set at build time using the TCP_WRAPPERS_DAEMON_NAME
193 build option.
194
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19511. [POSSIBLE CONFIG BREAKAGE] The default value for system_filter_user is now
196 the Exim run-time user, instead of root.
197
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19812. [POSSIBLE CONFIG BREAKAGE] ALT_CONFIG_ROOT_ONLY is no longer optional and
199 is forced on. This is mitigated by the new build option
90b6341f 200 TRUSTED_CONFIG_LIST which defines a list of configuration files which
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201 are trusted; one per line. If a config file is owned by root and matches
202 a pathname in the list, then it may be invoked by the Exim build-time
203 user without Exim relinquishing root privileges.
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204
20513. [POSSIBLE CONFIG BREAKAGE] The Exim user is no longer automatically
206 trusted to supply -D<Macro[=Value]> overrides on the command-line. Going
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207 forward, we recommend using TRUSTED_CONFIG_LIST with shim configs that
208 include the main config. As a transition mechanism, we are temporarily
209 providing a work-around: the new build option WHITELIST_D_MACROS provides
43236f35 210 a colon-separated list of macro names which may be overridden by the Exim
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211 run-time user. The values of these macros are constrained to the regex
212 ^[A-Za-z0-9_/.-]*$ (which explicitly does allow for empty values).
2cfd3221 213
77bb000f 214
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215Version 4.72
216------------
217
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218 1. TWO SECURITY FIXES: one relating to mail-spools which are globally
219 writable, the other to locking of MBX folders (not mbox).
220
221 2. MySQL stored procedures are now supported.
222
223 3. The dkim_domain transport option is now a list, not a single string, and
224 messages will be signed for each element in the list (discarding
225 duplicates).
226
227 4. The 4.70 release unexpectedly changed the behaviour of dnsdb TXT lookups
228 in the presence of multiple character strings within the RR. Prior to 4.70,
229 only the first string would be returned. The dnsdb lookup now, by default,
230 preserves the pre-4.70 semantics, but also now takes an extended output
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231 separator specification. The separator can be followed by a semicolon, to
232 concatenate the individual text strings together with no join character,
233 or by a comma and a second separator character, in which case the text
234 strings within a TXT record are joined on that second character.
235 Administrators are reminded that DNS provides no ordering guarantees
236 between multiple records in an RRset. For example:
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237
238 foo.example. IN TXT "a" "b" "c"
239 foo.example. IN TXT "d" "e" "f"
240
241 ${lookup dnsdb{>/ txt=foo.example}} -> "a/d"
242 ${lookup dnsdb{>/; txt=foo.example}} -> "def/abc"
8f425947 243 ${lookup dnsdb{>/,+ txt=foo.example}} -> "a+b+c/d+e+f"
b26eacf1 244
3fc596e4 245
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246Version 4.70 / 4.71
247-------------------
65a7d8c3 248
7c6d71af 249 1. Native DKIM support without an external library.
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250 (Note that if no action to prevent it is taken, a straight upgrade will
251 result in DKIM verification of all signed incoming emails. See spec
252 for details on conditionally disabling)
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253
254 2. Experimental DCC support via dccifd (contributed by Wolfgang Breyha).
65a7d8c3 255
f33253cc 256 3. There is now a bool{} expansion condition which maps certain strings to
7d9f747b 257 true/false condition values (most likely of use in conjunction with the
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258 and{} expansion operator).
259
260 4. The $spam_score, $spam_bar and $spam_report variables are now available
261 at delivery time.
262
263 5. exim -bP now supports "macros", "macro_list" or "macro MACRO_NAME" as
264 options, provided that Exim is invoked by an admin_user.
265
266 6. There is a new option gnutls_compat_mode, when linked against GnuTLS,
267 which increases compatibility with older clients at the cost of decreased
268 security. Don't set this unless you need to support such clients.
269
270 7. There is a new expansion operator, ${randint:...} which will produce a
271 "random" number less than the supplied integer. This randomness is
272 not guaranteed to be cryptographically strong, but depending upon how
273 Exim was built may be better than the most naive schemes.
274
275 8. Exim now explicitly ensures that SHA256 is available when linked against
276 OpenSSL.
277
278 9. The transport_filter_timeout option now applies to SMTP transports too.
279
65a7d8c3 280
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281Version 4.69
282------------
283
284 1. Preliminary DKIM support in Experimental.
285
286
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287Version 4.68
288------------
289
290 1. The body_linecount and body_zerocount C variables are now exported in the
291 local_scan API.
292
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293 2. When a dnslists lookup succeeds, the key that was looked up is now placed
294 in $dnslist_matched. When the key is an IP address, it is not reversed in
295 this variable (though it is, of course, in the actual lookup). In simple
296 cases, for example:
297
298 deny dnslists = spamhaus.example
299
300 the key is also available in another variable (in this case,
301 $sender_host_address). In more complicated cases, however, this is not
302 true. For example, using a data lookup might generate a dnslists lookup
303 like this:
304
305 deny dnslists = spamhaus.example/<|192.168.1.2|192.168.6.7|...
306
307 If this condition succeeds, the value in $dnslist_matched might be
308 192.168.6.7 (for example).
309
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310 3. Authenticators now have a client_condition option. When Exim is running as
311 a client, it skips an authenticator whose client_condition expansion yields
312 "0", "no", or "false". This can be used, for example, to skip plain text
313 authenticators when the connection is not encrypted by a setting such as:
314
315 client_condition = ${if !eq{$tls_cipher}{}}
316
317 Note that the 4.67 documentation states that $tls_cipher contains the
318 cipher used for incoming messages. In fact, during SMTP delivery, it
319 contains the cipher used for the delivery. The same is true for
320 $tls_peerdn.
321
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322 4. There is now a -Mvc <message-id> option, which outputs a copy of the
323 message to the standard output, in RFC 2822 format. The option can be used
324 only by an admin user.
325
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326 5. There is now a /noupdate option for the ratelimit ACL condition. It
327 computes the rate and checks the limit as normal, but it does not update
328 the saved data. This means that, in relevant ACLs, it is possible to lookup
329 the existence of a specified (or auto-generated) ratelimit key without
330 incrementing the ratelimit counter for that key.
331
332 In order for this to be useful, another ACL entry must set the rate
333 for the same key somewhere (otherwise it will always be zero).
334
335 Example:
336
337 acl_check_connect:
338 # Read the rate; if it doesn't exist or is below the maximum
339 # we update it below
340 deny ratelimit = 100 / 5m / strict / noupdate
341 log_message = RATE: $sender_rate / $sender_rate_period \
342 (max $sender_rate_limit)
343
344 [... some other logic and tests...]
345
346 warn ratelimit = 100 / 5m / strict / per_cmd
347 log_message = RATE UPDATE: $sender_rate / $sender_rate_period \
348 (max $sender_rate_limit)
349 condition = ${if le{$sender_rate}{$sender_rate_limit}}
350
351 accept
352
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353 6. The variable $max_received_linelength contains the number of bytes in the
354 longest line that was received as part of the message, not counting the
355 line termination character(s).
356
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357 7. Host lists can now include +ignore_defer and +include_defer, analagous to
358 +ignore_unknown and +include_unknown. These options should be used with
359 care, probably only in non-critical host lists such as whitelists.
360
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361 8. There's a new option called queue_only_load_latch, which defaults true.
362 If set false when queue_only_load is greater than zero, Exim re-evaluates
363 the load for each incoming message in an SMTP session. Otherwise, once one
364 message is queued, the remainder are also.
365
4f054c63 366 9. There is a new ACL, specified by acl_smtp_notquit, which is run in most
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367 cases when an SMTP session ends without sending QUIT. However, when Exim
368 itself is is bad trouble, such as being unable to write to its log files,
369 this ACL is not run, because it might try to do things (such as write to
370 log files) that make the situation even worse.
371
372 Like the QUIT ACL, this new ACL is provided to make it possible to gather
373 statistics. Whatever it returns (accept or deny) is immaterial. The "delay"
374 modifier is forbidden in this ACL.
375
376 When the NOTQUIT ACL is running, the variable $smtp_notquit_reason is set
377 to a string that indicates the reason for the termination of the SMTP
378 connection. The possible values are:
379
380 acl-drop Another ACL issued a "drop" command
381 bad-commands Too many unknown or non-mail commands
382 command-timeout Timeout while reading SMTP commands
383 connection-lost The SMTP connection has been lost
384 data-timeout Timeout while reading message data
385 local-scan-error The local_scan() function crashed
386 local-scan-timeout The local_scan() function timed out
387 signal-exit SIGTERM or SIGINT
388 synchronization-error SMTP synchronization error
389 tls-failed TLS failed to start
390
391 In most cases when an SMTP connection is closed without having received
392 QUIT, Exim sends an SMTP response message before actually closing the
393 connection. With the exception of acl-drop, the default message can be
394 overridden by the "message" modifier in the NOTQUIT ACL. In the case of a
395 "drop" verb in another ACL, it is the message from the other ACL that is
396 used.
397
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39810. For MySQL and PostgreSQL lookups, it is now possible to specify a list of
399 servers with individual queries. This is done by starting the query with
400 "servers=x:y:z;", where each item in the list may take one of two forms:
401
402 (1) If it is just a host name, the appropriate global option (mysql_servers
403 or pgsql_servers) is searched for a host of the same name, and the
404 remaining parameters (database, user, password) are taken from there.
405
406 (2) If it contains any slashes, it is taken as a complete parameter set.
407
408 The list of servers is used in exactly the same was as the global list.
409 Once a connection to a server has happened and a query has been
410 successfully executed, processing of the lookup ceases.
411
412 This feature is intended for use in master/slave situations where updates
413 are occurring, and one wants to update a master rather than a slave. If the
414 masters are in the list for reading, you might have:
415
416 mysql_servers = slave1/db/name/pw:slave2/db/name/pw:master/db/name/pw
417
418 In an updating lookup, you could then write
419
420 ${lookup mysql{servers=master; UPDATE ...}
421
422 If, on the other hand, the master is not to be used for reading lookups:
423
424 pgsql_servers = slave1/db/name/pw:slave2/db/name/pw
425
426 you can still update the master by
427
428 ${lookup pgsql{servers=master/db/name/pw; UPDATE ...}
429
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43011. The message_body_newlines option (default FALSE, for backwards
431 compatibility) can be used to control whether newlines are present in
432 $message_body and $message_body_end. If it is FALSE, they are replaced by
433 spaces.
434
2b85bce7 435
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436Version 4.67
437------------
438
439 1. There is a new log selector called smtp_no_mail, which is not included in
440 the default setting. When it is set, a line is written to the main log
441 whenever an accepted SMTP connection terminates without having issued a
4aa45c31 442 MAIL command.
b4ed4da0 443
431b7361 444 2. When an item in a dnslists list is followed by = and & and a list of IP
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445 addresses, the behaviour was not clear when the lookup returned more than
446 one IP address. This has been solved by the addition of == and =& for "all"
93655c46 447 rather than the default "any" matching.
431b7361 448
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449 3. Up till now, the only control over which cipher suites GnuTLS uses has been
450 for the cipher algorithms. New options have been added to allow some of the
451 other parameters to be varied.
431b7361 452
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453 4. There is a new compile-time option called ENABLE_DISABLE_FSYNC. When it is
454 set, Exim compiles a runtime option called disable_fsync.
431b7361 455
4aa45c31 456 5. There is a new variable called $smtp_count_at_connection_start.
431b7361 457
4aa45c31 458 6. There's a new control called no_pipelining.
cf8b11a5 459
41c7c167 460 7. There are two new variables called $sending_ip_address and $sending_port.
4aa45c31 461 These are set whenever an SMTP connection to another host has been set up.
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462
463 8. The expansion of the helo_data option in the smtp transport now happens
4aa45c31 464 after the connection to the server has been made.
41c7c167 465
9c57cbc0 466 9. There is a new expansion operator ${rfc2047d: that decodes strings that
4aa45c31 467 are encoded as per RFC 2047.
9c57cbc0 468
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46910. There is a new log selector called "pid", which causes the current process
470 id to be added to every log line, in square brackets, immediately after the
471 time and date.
472
047bdd8c 47311. Exim has been modified so that it flushes SMTP output before implementing
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474 a delay in an ACL. It also flushes the output before performing a callout,
475 as this can take a substantial time. These behaviours can be disabled by
476 obeying control = no_delay_flush or control = no_callout_flush,
4aa45c31 477 respectively, at some earlier stage of the connection.
047bdd8c 478
0ce9abe6 47912. There are two new expansion conditions that iterate over a list. They are
4aa45c31 480 called forany and forall.
0ce9abe6 481
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48213. There's a new global option called dsn_from that can be used to vary the
483 contents of From: lines in bounces and other automatically generated
484 messages ("delivery status notifications" - hence the name of the option).
0e22dfd1 485
4aa45c31 48614. The smtp transport has a new option called hosts_avoid_pipelining.
c51b8e75 487
75b1493f 48815. By default, exigrep does case-insensitive matches. There is now a -I option
4aa45c31 489 that makes it case-sensitive.
29f89cad 490
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49116. A number of new features ("addresses", "map", "filter", and "reduce") have
492 been added to string expansions to make it easier to process lists of
493 items, typically addresses.
29f89cad 494
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49517. There's a new ACL modifier called "continue". It does nothing of itself,
496 and processing of the ACL always continues with the next condition or
497 modifier. It is provided so that the side effects of expanding its argument
4aa45c31 498 can be used.
c3611384 499
ec95d1a6 50018. It is now possible to use newline and other control characters (those with
4aa45c31 501 values less than 32, plus DEL) as separators in lists.
ec95d1a6 502
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50319. The exigrep utility now has a -v option, which inverts the matching
504 condition.
505
c456d9bb 50620. The host_find_failed option in the manualroute router can now be set to
4aa45c31 507 "ignore".
c456d9bb 508
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509
510Version 4.66
511------------
512
513No new features were added to 4.66.
514
515
516Version 4.65
517------------
518
519No new features were added to 4.65.
520
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521
522Version 4.64
523------------
524
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525 1. ACL variables can now be given arbitrary names, as long as they start with
526 "acl_c" or "acl_m" (for connection variables and message variables), are at
527 least six characters long, with the sixth character being either a digit or
883335dc 528 an underscore.
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529
530 2. There is a new ACL modifier called log_reject_target. It makes it possible
883335dc 531 to specify which logs are used for messages about ACL rejections.
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532
533 3. There is a new authenticator called "dovecot". This is an interface to the
534 authentication facility of the Dovecot POP/IMAP server, which can support a
883335dc 535 number of authentication methods.
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536
537 4. The variable $message_headers_raw provides a concatenation of all the
538 messages's headers without any decoding. This is in contrast to
539 $message_headers, which does RFC2047 decoding on the header contents.
540
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541 5. In a DNS black list, if two domain names, comma-separated, are given, the
542 second is used first to do an initial check, making use of any IP value
543 restrictions that are set. If there is a match, the first domain is used,
544 without any IP value restrictions, to get the TXT record.
af561417 545
883335dc 546 6. All authenticators now have a server_condition option.
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547
548 7. There is a new command-line option called -Mset. It is useful only in
549 conjunction with -be (that is, when testing string expansions). It must be
550 followed by a message id; Exim loads the given message from its spool
883335dc 551 before doing the expansions.
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552
553 8. Another similar new command-line option is called -bem. It operates like
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554 -be except that it must be followed by the name of a file that contains a
555 message.
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556
557 9. When an address is delayed because of a 4xx response to a RCPT command, it
558 is now the combination of sender and recipient that is delayed in
883335dc 559 subsequent queue runs until its retry time is reached.
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560
56110. Unary negation and the bitwise logical operators and, or, xor, not, and
883335dc 562 shift, have been added to the eval: and eval10: expansion items.
48c7f9e2 563
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56411. The variables $interface_address and $interface_port have been renamed
565 as $received_ip_address and $received_port, to make it clear that they
566 relate to message reception rather than delivery. (The old names remain
567 available for compatibility.)
568
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56912. The "message" modifier can now be used on "accept" and "discard" acl verbs
570 to vary the message that is sent when an SMTP command is accepted.
4e88a19f 571
495ae4b0 572
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573Version 4.63
574------------
575
5761. There is a new Boolean option called filter_prepend_home for the redirect
38a0a95f 577 router.
4608d683 578
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5792. There is a new acl, set by acl_not_smtp_start, which is run right at the
580 start of receiving a non-SMTP message, before any of the message has been
38a0a95f 581 read.
45b91596 582
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5833. When an SMTP error message is specified in a "message" modifier in an ACL,
584 or in a :fail: or :defer: message in a redirect router, Exim now checks the
38a0a95f 585 start of the message for an SMTP error code.
a5bd321b 586
6ec97b1b 5874. There is a new parameter for LDAP lookups called "referrals", which takes
38a0a95f 588 one of the settings "follow" (the default) or "nofollow".
6ec97b1b 589
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5905. Version 20070721.2 of exipick now included, offering these new options:
591 --reverse
592 After all other sorting options have bee processed, reverse order
593 before displaying messages (-R is synonym).
594 --random
595 Randomize order of matching messages before displaying.
596 --size
597 Instead of displaying the matching messages, display the sum
598 of their sizes.
599 --sort <variable>[,<variable>...]
600 Before displaying matching messages, sort the messages according to
601 each messages value for each variable.
602 --not
603 Negate the value for every test (returns inverse output from the
604 same criteria without --not).
605
4608d683 606
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607Version 4.62
608------------
609
6101. The ${readsocket expansion item now supports Internet domain sockets as well
611 as Unix domain sockets. If the first argument begins "inet:", it must be of
612 the form "inet:host:port". The port is mandatory; it may be a number or the
613 name of a TCP port in /etc/services. The host may be a name, or it may be an
614 IP address. An ip address may optionally be enclosed in square brackets.
615 This is best for IPv6 addresses. For example:
616
617 ${readsocket{inet:[::1]:1234}{<request data>}...
618
619 Only a single host name may be given, but if looking it up yield more than
620 one IP address, they are each tried in turn until a connection is made. Once
621 a connection has been made, the behaviour is as for ${readsocket with a Unix
622 domain socket.
623
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6242. If a redirect router sets up file or pipe deliveries for more than one
625 incoming address, and the relevant transport has batch_max set greater than
626 one, a batch delivery now occurs.
627
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6283. The appendfile transport has a new option called maildirfolder_create_regex.
629 Its value is a regular expression. For a maildir delivery, this is matched
630 against the maildir directory; if it matches, Exim ensures that a
631 maildirfolder file is created alongside the new, cur, and tmp directories.
632
1cce3af8 633
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634Version 4.61
635------------
636
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637The documentation is up-to-date for the 4.61 release. Major new features since
638the 4.60 release are:
639
640. An option called disable_ipv6, to disable the use of IPv6 completely.
641
642. An increase in the number of ACL variables to 20 of each type.
643
644. A change to use $auth1, $auth2, and $auth3 in authenticators instead of $1,
645 $2, $3, (though those are still set) because the numeric variables get used
646 for other things in complicated expansions.
647
843a41e8 648. The default for rfc1413_query_timeout has been changed from 30s to 5s.
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649
650. It is possible to use setclassresources() on some BSD OS to control the
651 resources used in pipe deliveries.
652
653. A new ACL modifier called add_header, which can be used with any verb.
654
655. More errors are detectable in retry rules.
656
657There are a number of other additions too.
71fafd95 658
7e66e54d 659
425ae40f 660Version 4.60
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661------------
662
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663The documentation is up-to-date for the 4.60 release. Major new features since
664the 4.50 release are:
1a46a8c5 665
425ae40f 666. Support for SQLite.
1a46a8c5 667
425ae40f 668. Support for IGNOREQUOTA in LMTP.
1a46a8c5 669
425ae40f 670. Extensions to the "submission mode" features.
1a46a8c5 671
425ae40f 672. Support for Client SMTP Authorization (CSA).
1a46a8c5 673
425ae40f 674. Support for ratelimiting hosts and users.
b5aea5e1 675
425ae40f 676. New expansion items to help with the BATV "prvs" scheme.
b5aea5e1 677
425ae40f 678. A "match_ip" condition, that matches an IP address against a list.
35edf2ff 679
425ae40f 680There are many more minor changes.
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681
682****