Document gsasl integration
[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
21
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22Version 4.77
23------------
24
25 1. New options for the ratelimit ACL condition: /count= and /unique=.
26 The /noupdate option has been replaced by a /readonly option.
27
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28 2. The SMTP transport's protocol option may now be set to "smtps", to
29 use SSL-on-connect outbound.
30
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31 3. New variable $av_failed, set true if the AV scanner deferred; ie, when
32 there is a problem talking to the AV scanner, or the AV scanner running.
33
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34 4. New expansion conditions, "inlist" and "inlisti", which take simple lists
35 and check if the search item is a member of the list. This does not
36 support named lists, but does subject the list part to string expansion.
37
38 5. Unless the new EXPAND_LISTMATCH_RHS build option is set when Exim was
39 built, Exim no longer performs string expansion on the second string of
40 the match_* expansion conditions: "match_address", "match_domain",
41 "match_ip" & "match_local_part". Named lists can still be used.
42
7c6d71af 43
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44Version 4.76
45------------
46
47 1. The global option "dns_use_edns0" may be set to coerce EDNS0 usage on
48 or off in the resolver library.
49
50
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51Version 4.75
52------------
53
54 1. In addition to the existing LDAP and LDAP/SSL ("ldaps") support, there
55 is now LDAP/TLS support, given sufficiently modern OpenLDAP client
56 libraries. The following global options have been added in support of
57 this: ldap_ca_cert_dir, ldap_ca_cert_file, ldap_cert_file, ldap_cert_key,
58 ldap_cipher_suite, ldap_require_cert, ldap_start_tls.
59
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60 2. The pipe transport now takes a boolean option, "freeze_signal", default
61 false. When true, if the external delivery command exits on a signal then
62 Exim will freeze the message in the queue, instead of generating a bounce.
63
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64 3. Log filenames may now use %M as an escape, instead of %D (still available).
65 The %M pattern expands to yyyymm, providing month-level resolution.
66
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67 4. The $message_linecount variable is now updated for the maildir_tag option,
68 in the same way as $message_size, to reflect the real number of lines,
69 including any header additions or removals from transport.
70
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71 5. When contacting a pool of SpamAssassin servers configured in spamd_address,
72 Exim now selects entries randomly, to better scale in a cluster setup.
73
bc19a55b 74
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75Version 4.74
76------------
77
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78 1. SECURITY FIX: privilege escalation flaw fixed. On Linux (and only Linux)
79 the flaw permitted the Exim run-time user to cause root to append to
80 arbitrary files of the attacker's choosing, with the content based
81 on content supplied by the attacker.
82
83 2. Exim now supports loading some lookup types at run-time, using your
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84 platform's dlopen() functionality. This has limited platform support
85 and the intention is not to support every variant, it's limited to
86 dlopen(). This permits the main Exim binary to not be linked against
87 all the libraries needed for all the lookup types.
88
89
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90Version 4.73
91------------
92
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93 NOTE: this version is not guaranteed backwards-compatible, please read the
94 items below carefully
95
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96 1. A new main configuration option, "openssl_options", is available if Exim
97 is built with SSL support provided by OpenSSL. The option allows
98 administrators to specify OpenSSL options to be used on connections;
99 typically this is to set bug compatibility features which the OpenSSL
100 developers have not enabled by default. There may be security
101 consequences for certain options, so these should not be changed
102 frivolously.
103
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104 2. A new pipe transport option, "permit_coredumps", may help with problem
105 diagnosis in some scenarios. Note that Exim is typically installed as
106 a setuid binary, which on most OSes will inhibit coredumps by default,
43236f35 107 so that safety mechanism would have to be overridden for this option to
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108 be able to take effect.
109
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110 3. ClamAV 0.95 is now required for ClamAV support in Exim, unless
111 Local/Makefile sets: WITH_OLD_CLAMAV_STREAM=yes
112 Note that this switches Exim to use a new API ("INSTREAM") and a future
113 release of ClamAV will remove support for the old API ("STREAM").
114
115 The av_scanner option, when set to "clamd", now takes an optional third
116 part, "local", which causes Exim to pass a filename to ClamAV instead of
117 the file content. This is the same behaviour as when clamd is pointed at
118 a Unix-domain socket. For example:
119
120 av_scanner = clamd:192.0.2.3 1234:local
121
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122 ClamAV's ExtendedDetectionInfo response format is now handled.
123
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124 4. There is now a -bmalware option, restricted to admin users. This option
125 takes one parameter, a filename, and scans that file with Exim's
126 malware-scanning framework. This is intended purely as a debugging aid
127 to ensure that Exim's scanning is working, not to replace other tools.
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128 Note that the ACL framework is not invoked, so if av_scanner references
129 ACL variables without a fallback then this will fail.
8544e77a 130
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131 5. There is a new expansion operator, "reverse_ip", which will reverse IP
132 addresses; IPv4 into dotted quad, IPv6 into dotted nibble. Examples:
133
134 ${reverse_ip:192.0.2.4}
135 -> 4.2.0.192
136 ${reverse_ip:2001:0db8:c42:9:1:abcd:192.0.2.3}
137 -> 3.0.2.0.0.0.0.c.d.c.b.a.1.0.0.0.9.0.0.0.2.4.c.0.8.b.d.0.1.0.0.2
138
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139 6. There is a new ACL control called "debug", to enable debug logging.
140 This allows selective logging of certain incoming transactions within
141 production environments, with some care. It takes two options, "tag"
142 and "opts"; "tag" is included in the filename of the log and "opts"
143 is used as per the -d<options> command-line option. Examples, which
144 don't all make sense in all contexts:
145
146 control = debug
147 control = debug/tag=.$sender_host_address
148 control = debug/opts=+expand+acl
149 control = debug/tag=.$message_exim_id/opts=+expand
150
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151 7. It has always been implicit in the design and the documentation that
152 "the Exim user" is not root. src/EDITME said that using root was
153 "very strongly discouraged". This is not enough to keep people from
154 shooting themselves in the foot in days when many don't configure Exim
155 themselves but via package build managers. The security consequences of
156 running various bits of network code are severe if there should be bugs in
157 them. As such, the Exim user may no longer be root. If configured
158 statically, Exim will refuse to build. If configured as ref:user then Exim
159 will exit shortly after start-up. If you must shoot yourself in the foot,
160 then henceforth you will have to maintain your own local patches to strip
161 the safeties off.
162
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163 8. There is a new expansion operator, bool_lax{}. Where bool{} uses the ACL
164 condition logic to determine truth/failure and will fail to expand many
165 strings, bool_lax{} uses the router condition logic, where most strings
166 do evaluate true.
167 Note: bool{00} is false, bool_lax{00} is true.
168
169 9. Routers now support multiple "condition" tests,
532be449 170
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17110. There is now a runtime configuration option "tcp_wrappers_daemon_name".
172 Setting this allows an admin to define which entry in the tcpwrappers
173 config file will be used to control access to the daemon. This option
174 is only available when Exim is built with USE_TCP_WRAPPERS. The
175 default value is set at build time using the TCP_WRAPPERS_DAEMON_NAME
176 build option.
177
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17811. [POSSIBLE CONFIG BREAKAGE] The default value for system_filter_user is now
179 the Exim run-time user, instead of root.
180
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18112. [POSSIBLE CONFIG BREAKAGE] ALT_CONFIG_ROOT_ONLY is no longer optional and
182 is forced on. This is mitigated by the new build option
90b6341f 183 TRUSTED_CONFIG_LIST which defines a list of configuration files which
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184 are trusted; one per line. If a config file is owned by root and matches
185 a pathname in the list, then it may be invoked by the Exim build-time
186 user without Exim relinquishing root privileges.
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187
18813. [POSSIBLE CONFIG BREAKAGE] The Exim user is no longer automatically
189 trusted to supply -D<Macro[=Value]> overrides on the command-line. Going
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190 forward, we recommend using TRUSTED_CONFIG_LIST with shim configs that
191 include the main config. As a transition mechanism, we are temporarily
192 providing a work-around: the new build option WHITELIST_D_MACROS provides
43236f35 193 a colon-separated list of macro names which may be overridden by the Exim
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194 run-time user. The values of these macros are constrained to the regex
195 ^[A-Za-z0-9_/.-]*$ (which explicitly does allow for empty values).
2cfd3221 196
77bb000f 197
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198Version 4.72
199------------
200
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201 1. TWO SECURITY FIXES: one relating to mail-spools which are globally
202 writable, the other to locking of MBX folders (not mbox).
203
204 2. MySQL stored procedures are now supported.
205
206 3. The dkim_domain transport option is now a list, not a single string, and
207 messages will be signed for each element in the list (discarding
208 duplicates).
209
210 4. The 4.70 release unexpectedly changed the behaviour of dnsdb TXT lookups
211 in the presence of multiple character strings within the RR. Prior to 4.70,
212 only the first string would be returned. The dnsdb lookup now, by default,
213 preserves the pre-4.70 semantics, but also now takes an extended output
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214 separator specification. The separator can be followed by a semicolon, to
215 concatenate the individual text strings together with no join character,
216 or by a comma and a second separator character, in which case the text
217 strings within a TXT record are joined on that second character.
218 Administrators are reminded that DNS provides no ordering guarantees
219 between multiple records in an RRset. For example:
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220
221 foo.example. IN TXT "a" "b" "c"
222 foo.example. IN TXT "d" "e" "f"
223
224 ${lookup dnsdb{>/ txt=foo.example}} -> "a/d"
225 ${lookup dnsdb{>/; txt=foo.example}} -> "def/abc"
8f425947 226 ${lookup dnsdb{>/,+ txt=foo.example}} -> "a+b+c/d+e+f"
b26eacf1 227
3fc596e4 228
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229Version 4.70 / 4.71
230-------------------
65a7d8c3 231
7c6d71af 232 1. Native DKIM support without an external library.
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233 (Note that if no action to prevent it is taken, a straight upgrade will
234 result in DKIM verification of all signed incoming emails. See spec
235 for details on conditionally disabling)
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236
237 2. Experimental DCC support via dccifd (contributed by Wolfgang Breyha).
65a7d8c3 238
f33253cc 239 3. There is now a bool{} expansion condition which maps certain strings to
7d9f747b 240 true/false condition values (most likely of use in conjunction with the
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241 and{} expansion operator).
242
243 4. The $spam_score, $spam_bar and $spam_report variables are now available
244 at delivery time.
245
246 5. exim -bP now supports "macros", "macro_list" or "macro MACRO_NAME" as
247 options, provided that Exim is invoked by an admin_user.
248
249 6. There is a new option gnutls_compat_mode, when linked against GnuTLS,
250 which increases compatibility with older clients at the cost of decreased
251 security. Don't set this unless you need to support such clients.
252
253 7. There is a new expansion operator, ${randint:...} which will produce a
254 "random" number less than the supplied integer. This randomness is
255 not guaranteed to be cryptographically strong, but depending upon how
256 Exim was built may be better than the most naive schemes.
257
258 8. Exim now explicitly ensures that SHA256 is available when linked against
259 OpenSSL.
260
261 9. The transport_filter_timeout option now applies to SMTP transports too.
262
65a7d8c3 263
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264Version 4.69
265------------
266
267 1. Preliminary DKIM support in Experimental.
268
269
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270Version 4.68
271------------
272
273 1. The body_linecount and body_zerocount C variables are now exported in the
274 local_scan API.
275
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276 2. When a dnslists lookup succeeds, the key that was looked up is now placed
277 in $dnslist_matched. When the key is an IP address, it is not reversed in
278 this variable (though it is, of course, in the actual lookup). In simple
279 cases, for example:
280
281 deny dnslists = spamhaus.example
282
283 the key is also available in another variable (in this case,
284 $sender_host_address). In more complicated cases, however, this is not
285 true. For example, using a data lookup might generate a dnslists lookup
286 like this:
287
288 deny dnslists = spamhaus.example/<|192.168.1.2|192.168.6.7|...
289
290 If this condition succeeds, the value in $dnslist_matched might be
291 192.168.6.7 (for example).
292
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293 3. Authenticators now have a client_condition option. When Exim is running as
294 a client, it skips an authenticator whose client_condition expansion yields
295 "0", "no", or "false". This can be used, for example, to skip plain text
296 authenticators when the connection is not encrypted by a setting such as:
297
298 client_condition = ${if !eq{$tls_cipher}{}}
299
300 Note that the 4.67 documentation states that $tls_cipher contains the
301 cipher used for incoming messages. In fact, during SMTP delivery, it
302 contains the cipher used for the delivery. The same is true for
303 $tls_peerdn.
304
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305 4. There is now a -Mvc <message-id> option, which outputs a copy of the
306 message to the standard output, in RFC 2822 format. The option can be used
307 only by an admin user.
308
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309 5. There is now a /noupdate option for the ratelimit ACL condition. It
310 computes the rate and checks the limit as normal, but it does not update
311 the saved data. This means that, in relevant ACLs, it is possible to lookup
312 the existence of a specified (or auto-generated) ratelimit key without
313 incrementing the ratelimit counter for that key.
314
315 In order for this to be useful, another ACL entry must set the rate
316 for the same key somewhere (otherwise it will always be zero).
317
318 Example:
319
320 acl_check_connect:
321 # Read the rate; if it doesn't exist or is below the maximum
322 # we update it below
323 deny ratelimit = 100 / 5m / strict / noupdate
324 log_message = RATE: $sender_rate / $sender_rate_period \
325 (max $sender_rate_limit)
326
327 [... some other logic and tests...]
328
329 warn ratelimit = 100 / 5m / strict / per_cmd
330 log_message = RATE UPDATE: $sender_rate / $sender_rate_period \
331 (max $sender_rate_limit)
332 condition = ${if le{$sender_rate}{$sender_rate_limit}}
333
334 accept
335
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336 6. The variable $max_received_linelength contains the number of bytes in the
337 longest line that was received as part of the message, not counting the
338 line termination character(s).
339
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340 7. Host lists can now include +ignore_defer and +include_defer, analagous to
341 +ignore_unknown and +include_unknown. These options should be used with
342 care, probably only in non-critical host lists such as whitelists.
343
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344 8. There's a new option called queue_only_load_latch, which defaults true.
345 If set false when queue_only_load is greater than zero, Exim re-evaluates
346 the load for each incoming message in an SMTP session. Otherwise, once one
347 message is queued, the remainder are also.
348
4f054c63 349 9. There is a new ACL, specified by acl_smtp_notquit, which is run in most
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350 cases when an SMTP session ends without sending QUIT. However, when Exim
351 itself is is bad trouble, such as being unable to write to its log files,
352 this ACL is not run, because it might try to do things (such as write to
353 log files) that make the situation even worse.
354
355 Like the QUIT ACL, this new ACL is provided to make it possible to gather
356 statistics. Whatever it returns (accept or deny) is immaterial. The "delay"
357 modifier is forbidden in this ACL.
358
359 When the NOTQUIT ACL is running, the variable $smtp_notquit_reason is set
360 to a string that indicates the reason for the termination of the SMTP
361 connection. The possible values are:
362
363 acl-drop Another ACL issued a "drop" command
364 bad-commands Too many unknown or non-mail commands
365 command-timeout Timeout while reading SMTP commands
366 connection-lost The SMTP connection has been lost
367 data-timeout Timeout while reading message data
368 local-scan-error The local_scan() function crashed
369 local-scan-timeout The local_scan() function timed out
370 signal-exit SIGTERM or SIGINT
371 synchronization-error SMTP synchronization error
372 tls-failed TLS failed to start
373
374 In most cases when an SMTP connection is closed without having received
375 QUIT, Exim sends an SMTP response message before actually closing the
376 connection. With the exception of acl-drop, the default message can be
377 overridden by the "message" modifier in the NOTQUIT ACL. In the case of a
378 "drop" verb in another ACL, it is the message from the other ACL that is
379 used.
380
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38110. For MySQL and PostgreSQL lookups, it is now possible to specify a list of
382 servers with individual queries. This is done by starting the query with
383 "servers=x:y:z;", where each item in the list may take one of two forms:
384
385 (1) If it is just a host name, the appropriate global option (mysql_servers
386 or pgsql_servers) is searched for a host of the same name, and the
387 remaining parameters (database, user, password) are taken from there.
388
389 (2) If it contains any slashes, it is taken as a complete parameter set.
390
391 The list of servers is used in exactly the same was as the global list.
392 Once a connection to a server has happened and a query has been
393 successfully executed, processing of the lookup ceases.
394
395 This feature is intended for use in master/slave situations where updates
396 are occurring, and one wants to update a master rather than a slave. If the
397 masters are in the list for reading, you might have:
398
399 mysql_servers = slave1/db/name/pw:slave2/db/name/pw:master/db/name/pw
400
401 In an updating lookup, you could then write
402
403 ${lookup mysql{servers=master; UPDATE ...}
404
405 If, on the other hand, the master is not to be used for reading lookups:
406
407 pgsql_servers = slave1/db/name/pw:slave2/db/name/pw
408
409 you can still update the master by
410
411 ${lookup pgsql{servers=master/db/name/pw; UPDATE ...}
412
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41311. The message_body_newlines option (default FALSE, for backwards
414 compatibility) can be used to control whether newlines are present in
415 $message_body and $message_body_end. If it is FALSE, they are replaced by
416 spaces.
417
2b85bce7 418
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419Version 4.67
420------------
421
422 1. There is a new log selector called smtp_no_mail, which is not included in
423 the default setting. When it is set, a line is written to the main log
424 whenever an accepted SMTP connection terminates without having issued a
4aa45c31 425 MAIL command.
b4ed4da0 426
431b7361 427 2. When an item in a dnslists list is followed by = and & and a list of IP
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428 addresses, the behaviour was not clear when the lookup returned more than
429 one IP address. This has been solved by the addition of == and =& for "all"
93655c46 430 rather than the default "any" matching.
431b7361 431
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432 3. Up till now, the only control over which cipher suites GnuTLS uses has been
433 for the cipher algorithms. New options have been added to allow some of the
434 other parameters to be varied.
431b7361 435
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436 4. There is a new compile-time option called ENABLE_DISABLE_FSYNC. When it is
437 set, Exim compiles a runtime option called disable_fsync.
431b7361 438
4aa45c31 439 5. There is a new variable called $smtp_count_at_connection_start.
431b7361 440
4aa45c31 441 6. There's a new control called no_pipelining.
cf8b11a5 442
41c7c167 443 7. There are two new variables called $sending_ip_address and $sending_port.
4aa45c31 444 These are set whenever an SMTP connection to another host has been set up.
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445
446 8. The expansion of the helo_data option in the smtp transport now happens
4aa45c31 447 after the connection to the server has been made.
41c7c167 448
9c57cbc0 449 9. There is a new expansion operator ${rfc2047d: that decodes strings that
4aa45c31 450 are encoded as per RFC 2047.
9c57cbc0 451
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45210. There is a new log selector called "pid", which causes the current process
453 id to be added to every log line, in square brackets, immediately after the
454 time and date.
455
047bdd8c 45611. Exim has been modified so that it flushes SMTP output before implementing
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457 a delay in an ACL. It also flushes the output before performing a callout,
458 as this can take a substantial time. These behaviours can be disabled by
459 obeying control = no_delay_flush or control = no_callout_flush,
4aa45c31 460 respectively, at some earlier stage of the connection.
047bdd8c 461
0ce9abe6 46212. There are two new expansion conditions that iterate over a list. They are
4aa45c31 463 called forany and forall.
0ce9abe6 464
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46513. There's a new global option called dsn_from that can be used to vary the
466 contents of From: lines in bounces and other automatically generated
467 messages ("delivery status notifications" - hence the name of the option).
0e22dfd1 468
4aa45c31 46914. The smtp transport has a new option called hosts_avoid_pipelining.
c51b8e75 470
75b1493f 47115. By default, exigrep does case-insensitive matches. There is now a -I option
4aa45c31 472 that makes it case-sensitive.
29f89cad 473
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47416. A number of new features ("addresses", "map", "filter", and "reduce") have
475 been added to string expansions to make it easier to process lists of
476 items, typically addresses.
29f89cad 477
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47817. There's a new ACL modifier called "continue". It does nothing of itself,
479 and processing of the ACL always continues with the next condition or
480 modifier. It is provided so that the side effects of expanding its argument
4aa45c31 481 can be used.
c3611384 482
ec95d1a6 48318. It is now possible to use newline and other control characters (those with
4aa45c31 484 values less than 32, plus DEL) as separators in lists.
ec95d1a6 485
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48619. The exigrep utility now has a -v option, which inverts the matching
487 condition.
488
c456d9bb 48920. The host_find_failed option in the manualroute router can now be set to
4aa45c31 490 "ignore".
c456d9bb 491
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492
493Version 4.66
494------------
495
496No new features were added to 4.66.
497
498
499Version 4.65
500------------
501
502No new features were added to 4.65.
503
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504
505Version 4.64
506------------
507
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508 1. ACL variables can now be given arbitrary names, as long as they start with
509 "acl_c" or "acl_m" (for connection variables and message variables), are at
510 least six characters long, with the sixth character being either a digit or
883335dc 511 an underscore.
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512
513 2. There is a new ACL modifier called log_reject_target. It makes it possible
883335dc 514 to specify which logs are used for messages about ACL rejections.
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515
516 3. There is a new authenticator called "dovecot". This is an interface to the
517 authentication facility of the Dovecot POP/IMAP server, which can support a
883335dc 518 number of authentication methods.
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519
520 4. The variable $message_headers_raw provides a concatenation of all the
521 messages's headers without any decoding. This is in contrast to
522 $message_headers, which does RFC2047 decoding on the header contents.
523
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524 5. In a DNS black list, if two domain names, comma-separated, are given, the
525 second is used first to do an initial check, making use of any IP value
526 restrictions that are set. If there is a match, the first domain is used,
527 without any IP value restrictions, to get the TXT record.
af561417 528
883335dc 529 6. All authenticators now have a server_condition option.
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530
531 7. There is a new command-line option called -Mset. It is useful only in
532 conjunction with -be (that is, when testing string expansions). It must be
533 followed by a message id; Exim loads the given message from its spool
883335dc 534 before doing the expansions.
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535
536 8. Another similar new command-line option is called -bem. It operates like
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537 -be except that it must be followed by the name of a file that contains a
538 message.
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539
540 9. When an address is delayed because of a 4xx response to a RCPT command, it
541 is now the combination of sender and recipient that is delayed in
883335dc 542 subsequent queue runs until its retry time is reached.
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543
54410. Unary negation and the bitwise logical operators and, or, xor, not, and
883335dc 545 shift, have been added to the eval: and eval10: expansion items.
48c7f9e2 546
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54711. The variables $interface_address and $interface_port have been renamed
548 as $received_ip_address and $received_port, to make it clear that they
549 relate to message reception rather than delivery. (The old names remain
550 available for compatibility.)
551
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55212. The "message" modifier can now be used on "accept" and "discard" acl verbs
553 to vary the message that is sent when an SMTP command is accepted.
4e88a19f 554
495ae4b0 555
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556Version 4.63
557------------
558
5591. There is a new Boolean option called filter_prepend_home for the redirect
38a0a95f 560 router.
4608d683 561
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5622. There is a new acl, set by acl_not_smtp_start, which is run right at the
563 start of receiving a non-SMTP message, before any of the message has been
38a0a95f 564 read.
45b91596 565
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5663. When an SMTP error message is specified in a "message" modifier in an ACL,
567 or in a :fail: or :defer: message in a redirect router, Exim now checks the
38a0a95f 568 start of the message for an SMTP error code.
a5bd321b 569
6ec97b1b 5704. There is a new parameter for LDAP lookups called "referrals", which takes
38a0a95f 571 one of the settings "follow" (the default) or "nofollow".
6ec97b1b 572
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5735. Version 20070721.2 of exipick now included, offering these new options:
574 --reverse
575 After all other sorting options have bee processed, reverse order
576 before displaying messages (-R is synonym).
577 --random
578 Randomize order of matching messages before displaying.
579 --size
580 Instead of displaying the matching messages, display the sum
581 of their sizes.
582 --sort <variable>[,<variable>...]
583 Before displaying matching messages, sort the messages according to
584 each messages value for each variable.
585 --not
586 Negate the value for every test (returns inverse output from the
587 same criteria without --not).
588
4608d683 589
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590Version 4.62
591------------
592
5931. The ${readsocket expansion item now supports Internet domain sockets as well
594 as Unix domain sockets. If the first argument begins "inet:", it must be of
595 the form "inet:host:port". The port is mandatory; it may be a number or the
596 name of a TCP port in /etc/services. The host may be a name, or it may be an
597 IP address. An ip address may optionally be enclosed in square brackets.
598 This is best for IPv6 addresses. For example:
599
600 ${readsocket{inet:[::1]:1234}{<request data>}...
601
602 Only a single host name may be given, but if looking it up yield more than
603 one IP address, they are each tried in turn until a connection is made. Once
604 a connection has been made, the behaviour is as for ${readsocket with a Unix
605 domain socket.
606
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6072. If a redirect router sets up file or pipe deliveries for more than one
608 incoming address, and the relevant transport has batch_max set greater than
609 one, a batch delivery now occurs.
610
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6113. The appendfile transport has a new option called maildirfolder_create_regex.
612 Its value is a regular expression. For a maildir delivery, this is matched
613 against the maildir directory; if it matches, Exim ensures that a
614 maildirfolder file is created alongside the new, cur, and tmp directories.
615
1cce3af8 616
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617Version 4.61
618------------
619
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620The documentation is up-to-date for the 4.61 release. Major new features since
621the 4.60 release are:
622
623. An option called disable_ipv6, to disable the use of IPv6 completely.
624
625. An increase in the number of ACL variables to 20 of each type.
626
627. A change to use $auth1, $auth2, and $auth3 in authenticators instead of $1,
628 $2, $3, (though those are still set) because the numeric variables get used
629 for other things in complicated expansions.
630
843a41e8 631. The default for rfc1413_query_timeout has been changed from 30s to 5s.
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632
633. It is possible to use setclassresources() on some BSD OS to control the
634 resources used in pipe deliveries.
635
636. A new ACL modifier called add_header, which can be used with any verb.
637
638. More errors are detectable in retry rules.
639
640There are a number of other additions too.
71fafd95 641
7e66e54d 642
425ae40f 643Version 4.60
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644------------
645
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646The documentation is up-to-date for the 4.60 release. Major new features since
647the 4.50 release are:
1a46a8c5 648
425ae40f 649. Support for SQLite.
1a46a8c5 650
425ae40f 651. Support for IGNOREQUOTA in LMTP.
1a46a8c5 652
425ae40f 653. Extensions to the "submission mode" features.
1a46a8c5 654
425ae40f 655. Support for Client SMTP Authorization (CSA).
1a46a8c5 656
425ae40f 657. Support for ratelimiting hosts and users.
b5aea5e1 658
425ae40f 659. New expansion items to help with the BATV "prvs" scheme.
b5aea5e1 660
425ae40f 661. A "match_ip" condition, that matches an IP address against a list.
35edf2ff 662
425ae40f 663There are many more minor changes.
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664
665****