$av_failed variable set when av_scanner deferred
[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 4.77
10------------
11
12 1. New options for the ratelimit ACL condition: /count= and /unique=.
13 The /noupdate option has been replaced by a /readonly option.
14
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15 2. The SMTP transport's protocol option may now be set to "smtps", to
16 use SSL-on-connect outbound.
17
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18 3. New variable $av_failed, set true if the AV scanner deferred; ie, when
19 there is a problem talking to the AV scanner, or the AV scanner running.
20
7c6d71af 21
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22Version 4.76
23------------
24
25 1. The global option "dns_use_edns0" may be set to coerce EDNS0 usage on
26 or off in the resolver library.
27
28
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29Version 4.75
30------------
31
32 1. In addition to the existing LDAP and LDAP/SSL ("ldaps") support, there
33 is now LDAP/TLS support, given sufficiently modern OpenLDAP client
34 libraries. The following global options have been added in support of
35 this: ldap_ca_cert_dir, ldap_ca_cert_file, ldap_cert_file, ldap_cert_key,
36 ldap_cipher_suite, ldap_require_cert, ldap_start_tls.
37
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38 2. The pipe transport now takes a boolean option, "freeze_signal", default
39 false. When true, if the external delivery command exits on a signal then
40 Exim will freeze the message in the queue, instead of generating a bounce.
41
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42 3. Log filenames may now use %M as an escape, instead of %D (still available).
43 The %M pattern expands to yyyymm, providing month-level resolution.
44
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45 4. The $message_linecount variable is now updated for the maildir_tag option,
46 in the same way as $message_size, to reflect the real number of lines,
47 including any header additions or removals from transport.
48
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49 5. When contacting a pool of SpamAssassin servers configured in spamd_address,
50 Exim now selects entries randomly, to better scale in a cluster setup.
51
bc19a55b 52
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53Version 4.74
54------------
55
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56 1. SECURITY FIX: privilege escalation flaw fixed. On Linux (and only Linux)
57 the flaw permitted the Exim run-time user to cause root to append to
58 arbitrary files of the attacker's choosing, with the content based
59 on content supplied by the attacker.
60
61 2. Exim now supports loading some lookup types at run-time, using your
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62 platform's dlopen() functionality. This has limited platform support
63 and the intention is not to support every variant, it's limited to
64 dlopen(). This permits the main Exim binary to not be linked against
65 all the libraries needed for all the lookup types.
66
67
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68Version 4.73
69------------
70
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71 NOTE: this version is not guaranteed backwards-compatible, please read the
72 items below carefully
73
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74 1. A new main configuration option, "openssl_options", is available if Exim
75 is built with SSL support provided by OpenSSL. The option allows
76 administrators to specify OpenSSL options to be used on connections;
77 typically this is to set bug compatibility features which the OpenSSL
78 developers have not enabled by default. There may be security
79 consequences for certain options, so these should not be changed
80 frivolously.
81
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82 2. A new pipe transport option, "permit_coredumps", may help with problem
83 diagnosis in some scenarios. Note that Exim is typically installed as
84 a setuid binary, which on most OSes will inhibit coredumps by default,
43236f35 85 so that safety mechanism would have to be overridden for this option to
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86 be able to take effect.
87
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88 3. ClamAV 0.95 is now required for ClamAV support in Exim, unless
89 Local/Makefile sets: WITH_OLD_CLAMAV_STREAM=yes
90 Note that this switches Exim to use a new API ("INSTREAM") and a future
91 release of ClamAV will remove support for the old API ("STREAM").
92
93 The av_scanner option, when set to "clamd", now takes an optional third
94 part, "local", which causes Exim to pass a filename to ClamAV instead of
95 the file content. This is the same behaviour as when clamd is pointed at
96 a Unix-domain socket. For example:
97
98 av_scanner = clamd:192.0.2.3 1234:local
99
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100 ClamAV's ExtendedDetectionInfo response format is now handled.
101
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102 4. There is now a -bmalware option, restricted to admin users. This option
103 takes one parameter, a filename, and scans that file with Exim's
104 malware-scanning framework. This is intended purely as a debugging aid
105 to ensure that Exim's scanning is working, not to replace other tools.
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106 Note that the ACL framework is not invoked, so if av_scanner references
107 ACL variables without a fallback then this will fail.
8544e77a 108
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109 5. There is a new expansion operator, "reverse_ip", which will reverse IP
110 addresses; IPv4 into dotted quad, IPv6 into dotted nibble. Examples:
111
112 ${reverse_ip:192.0.2.4}
113 -> 4.2.0.192
114 ${reverse_ip:2001:0db8:c42:9:1:abcd:192.0.2.3}
115 -> 3.0.2.0.0.0.0.c.d.c.b.a.1.0.0.0.9.0.0.0.2.4.c.0.8.b.d.0.1.0.0.2
116
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117 6. There is a new ACL control called "debug", to enable debug logging.
118 This allows selective logging of certain incoming transactions within
119 production environments, with some care. It takes two options, "tag"
120 and "opts"; "tag" is included in the filename of the log and "opts"
121 is used as per the -d<options> command-line option. Examples, which
122 don't all make sense in all contexts:
123
124 control = debug
125 control = debug/tag=.$sender_host_address
126 control = debug/opts=+expand+acl
127 control = debug/tag=.$message_exim_id/opts=+expand
128
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129 7. It has always been implicit in the design and the documentation that
130 "the Exim user" is not root. src/EDITME said that using root was
131 "very strongly discouraged". This is not enough to keep people from
132 shooting themselves in the foot in days when many don't configure Exim
133 themselves but via package build managers. The security consequences of
134 running various bits of network code are severe if there should be bugs in
135 them. As such, the Exim user may no longer be root. If configured
136 statically, Exim will refuse to build. If configured as ref:user then Exim
137 will exit shortly after start-up. If you must shoot yourself in the foot,
138 then henceforth you will have to maintain your own local patches to strip
139 the safeties off.
140
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141 8. There is a new expansion operator, bool_lax{}. Where bool{} uses the ACL
142 condition logic to determine truth/failure and will fail to expand many
143 strings, bool_lax{} uses the router condition logic, where most strings
144 do evaluate true.
145 Note: bool{00} is false, bool_lax{00} is true.
146
147 9. Routers now support multiple "condition" tests,
532be449 148
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14910. There is now a runtime configuration option "tcp_wrappers_daemon_name".
150 Setting this allows an admin to define which entry in the tcpwrappers
151 config file will be used to control access to the daemon. This option
152 is only available when Exim is built with USE_TCP_WRAPPERS. The
153 default value is set at build time using the TCP_WRAPPERS_DAEMON_NAME
154 build option.
155
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15611. [POSSIBLE CONFIG BREAKAGE] The default value for system_filter_user is now
157 the Exim run-time user, instead of root.
158
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15912. [POSSIBLE CONFIG BREAKAGE] ALT_CONFIG_ROOT_ONLY is no longer optional and
160 is forced on. This is mitigated by the new build option
90b6341f 161 TRUSTED_CONFIG_LIST which defines a list of configuration files which
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162 are trusted; one per line. If a config file is owned by root and matches
163 a pathname in the list, then it may be invoked by the Exim build-time
164 user without Exim relinquishing root privileges.
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165
16613. [POSSIBLE CONFIG BREAKAGE] The Exim user is no longer automatically
167 trusted to supply -D<Macro[=Value]> overrides on the command-line. Going
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168 forward, we recommend using TRUSTED_CONFIG_LIST with shim configs that
169 include the main config. As a transition mechanism, we are temporarily
170 providing a work-around: the new build option WHITELIST_D_MACROS provides
43236f35 171 a colon-separated list of macro names which may be overridden by the Exim
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172 run-time user. The values of these macros are constrained to the regex
173 ^[A-Za-z0-9_/.-]*$ (which explicitly does allow for empty values).
2cfd3221 174
77bb000f 175
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176Version 4.72
177------------
178
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179 1. TWO SECURITY FIXES: one relating to mail-spools which are globally
180 writable, the other to locking of MBX folders (not mbox).
181
182 2. MySQL stored procedures are now supported.
183
184 3. The dkim_domain transport option is now a list, not a single string, and
185 messages will be signed for each element in the list (discarding
186 duplicates).
187
188 4. The 4.70 release unexpectedly changed the behaviour of dnsdb TXT lookups
189 in the presence of multiple character strings within the RR. Prior to 4.70,
190 only the first string would be returned. The dnsdb lookup now, by default,
191 preserves the pre-4.70 semantics, but also now takes an extended output
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192 separator specification. The separator can be followed by a semicolon, to
193 concatenate the individual text strings together with no join character,
194 or by a comma and a second separator character, in which case the text
195 strings within a TXT record are joined on that second character.
196 Administrators are reminded that DNS provides no ordering guarantees
197 between multiple records in an RRset. For example:
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198
199 foo.example. IN TXT "a" "b" "c"
200 foo.example. IN TXT "d" "e" "f"
201
202 ${lookup dnsdb{>/ txt=foo.example}} -> "a/d"
203 ${lookup dnsdb{>/; txt=foo.example}} -> "def/abc"
8f425947 204 ${lookup dnsdb{>/,+ txt=foo.example}} -> "a+b+c/d+e+f"
b26eacf1 205
3fc596e4 206
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207Version 4.70 / 4.71
208-------------------
65a7d8c3 209
7c6d71af 210 1. Native DKIM support without an external library.
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211 (Note that if no action to prevent it is taken, a straight upgrade will
212 result in DKIM verification of all signed incoming emails. See spec
213 for details on conditionally disabling)
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214
215 2. Experimental DCC support via dccifd (contributed by Wolfgang Breyha).
65a7d8c3 216
f33253cc 217 3. There is now a bool{} expansion condition which maps certain strings to
7d9f747b 218 true/false condition values (most likely of use in conjunction with the
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219 and{} expansion operator).
220
221 4. The $spam_score, $spam_bar and $spam_report variables are now available
222 at delivery time.
223
224 5. exim -bP now supports "macros", "macro_list" or "macro MACRO_NAME" as
225 options, provided that Exim is invoked by an admin_user.
226
227 6. There is a new option gnutls_compat_mode, when linked against GnuTLS,
228 which increases compatibility with older clients at the cost of decreased
229 security. Don't set this unless you need to support such clients.
230
231 7. There is a new expansion operator, ${randint:...} which will produce a
232 "random" number less than the supplied integer. This randomness is
233 not guaranteed to be cryptographically strong, but depending upon how
234 Exim was built may be better than the most naive schemes.
235
236 8. Exim now explicitly ensures that SHA256 is available when linked against
237 OpenSSL.
238
239 9. The transport_filter_timeout option now applies to SMTP transports too.
240
65a7d8c3 241
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242Version 4.69
243------------
244
245 1. Preliminary DKIM support in Experimental.
246
247
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248Version 4.68
249------------
250
251 1. The body_linecount and body_zerocount C variables are now exported in the
252 local_scan API.
253
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254 2. When a dnslists lookup succeeds, the key that was looked up is now placed
255 in $dnslist_matched. When the key is an IP address, it is not reversed in
256 this variable (though it is, of course, in the actual lookup). In simple
257 cases, for example:
258
259 deny dnslists = spamhaus.example
260
261 the key is also available in another variable (in this case,
262 $sender_host_address). In more complicated cases, however, this is not
263 true. For example, using a data lookup might generate a dnslists lookup
264 like this:
265
266 deny dnslists = spamhaus.example/<|192.168.1.2|192.168.6.7|...
267
268 If this condition succeeds, the value in $dnslist_matched might be
269 192.168.6.7 (for example).
270
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271 3. Authenticators now have a client_condition option. When Exim is running as
272 a client, it skips an authenticator whose client_condition expansion yields
273 "0", "no", or "false". This can be used, for example, to skip plain text
274 authenticators when the connection is not encrypted by a setting such as:
275
276 client_condition = ${if !eq{$tls_cipher}{}}
277
278 Note that the 4.67 documentation states that $tls_cipher contains the
279 cipher used for incoming messages. In fact, during SMTP delivery, it
280 contains the cipher used for the delivery. The same is true for
281 $tls_peerdn.
282
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283 4. There is now a -Mvc <message-id> option, which outputs a copy of the
284 message to the standard output, in RFC 2822 format. The option can be used
285 only by an admin user.
286
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287 5. There is now a /noupdate option for the ratelimit ACL condition. It
288 computes the rate and checks the limit as normal, but it does not update
289 the saved data. This means that, in relevant ACLs, it is possible to lookup
290 the existence of a specified (or auto-generated) ratelimit key without
291 incrementing the ratelimit counter for that key.
292
293 In order for this to be useful, another ACL entry must set the rate
294 for the same key somewhere (otherwise it will always be zero).
295
296 Example:
297
298 acl_check_connect:
299 # Read the rate; if it doesn't exist or is below the maximum
300 # we update it below
301 deny ratelimit = 100 / 5m / strict / noupdate
302 log_message = RATE: $sender_rate / $sender_rate_period \
303 (max $sender_rate_limit)
304
305 [... some other logic and tests...]
306
307 warn ratelimit = 100 / 5m / strict / per_cmd
308 log_message = RATE UPDATE: $sender_rate / $sender_rate_period \
309 (max $sender_rate_limit)
310 condition = ${if le{$sender_rate}{$sender_rate_limit}}
311
312 accept
313
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314 6. The variable $max_received_linelength contains the number of bytes in the
315 longest line that was received as part of the message, not counting the
316 line termination character(s).
317
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318 7. Host lists can now include +ignore_defer and +include_defer, analagous to
319 +ignore_unknown and +include_unknown. These options should be used with
320 care, probably only in non-critical host lists such as whitelists.
321
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322 8. There's a new option called queue_only_load_latch, which defaults true.
323 If set false when queue_only_load is greater than zero, Exim re-evaluates
324 the load for each incoming message in an SMTP session. Otherwise, once one
325 message is queued, the remainder are also.
326
4f054c63 327 9. There is a new ACL, specified by acl_smtp_notquit, which is run in most
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328 cases when an SMTP session ends without sending QUIT. However, when Exim
329 itself is is bad trouble, such as being unable to write to its log files,
330 this ACL is not run, because it might try to do things (such as write to
331 log files) that make the situation even worse.
332
333 Like the QUIT ACL, this new ACL is provided to make it possible to gather
334 statistics. Whatever it returns (accept or deny) is immaterial. The "delay"
335 modifier is forbidden in this ACL.
336
337 When the NOTQUIT ACL is running, the variable $smtp_notquit_reason is set
338 to a string that indicates the reason for the termination of the SMTP
339 connection. The possible values are:
340
341 acl-drop Another ACL issued a "drop" command
342 bad-commands Too many unknown or non-mail commands
343 command-timeout Timeout while reading SMTP commands
344 connection-lost The SMTP connection has been lost
345 data-timeout Timeout while reading message data
346 local-scan-error The local_scan() function crashed
347 local-scan-timeout The local_scan() function timed out
348 signal-exit SIGTERM or SIGINT
349 synchronization-error SMTP synchronization error
350 tls-failed TLS failed to start
351
352 In most cases when an SMTP connection is closed without having received
353 QUIT, Exim sends an SMTP response message before actually closing the
354 connection. With the exception of acl-drop, the default message can be
355 overridden by the "message" modifier in the NOTQUIT ACL. In the case of a
356 "drop" verb in another ACL, it is the message from the other ACL that is
357 used.
358
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35910. For MySQL and PostgreSQL lookups, it is now possible to specify a list of
360 servers with individual queries. This is done by starting the query with
361 "servers=x:y:z;", where each item in the list may take one of two forms:
362
363 (1) If it is just a host name, the appropriate global option (mysql_servers
364 or pgsql_servers) is searched for a host of the same name, and the
365 remaining parameters (database, user, password) are taken from there.
366
367 (2) If it contains any slashes, it is taken as a complete parameter set.
368
369 The list of servers is used in exactly the same was as the global list.
370 Once a connection to a server has happened and a query has been
371 successfully executed, processing of the lookup ceases.
372
373 This feature is intended for use in master/slave situations where updates
374 are occurring, and one wants to update a master rather than a slave. If the
375 masters are in the list for reading, you might have:
376
377 mysql_servers = slave1/db/name/pw:slave2/db/name/pw:master/db/name/pw
378
379 In an updating lookup, you could then write
380
381 ${lookup mysql{servers=master; UPDATE ...}
382
383 If, on the other hand, the master is not to be used for reading lookups:
384
385 pgsql_servers = slave1/db/name/pw:slave2/db/name/pw
386
387 you can still update the master by
388
389 ${lookup pgsql{servers=master/db/name/pw; UPDATE ...}
390
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39111. The message_body_newlines option (default FALSE, for backwards
392 compatibility) can be used to control whether newlines are present in
393 $message_body and $message_body_end. If it is FALSE, they are replaced by
394 spaces.
395
2b85bce7 396
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397Version 4.67
398------------
399
400 1. There is a new log selector called smtp_no_mail, which is not included in
401 the default setting. When it is set, a line is written to the main log
402 whenever an accepted SMTP connection terminates without having issued a
4aa45c31 403 MAIL command.
b4ed4da0 404
431b7361 405 2. When an item in a dnslists list is followed by = and & and a list of IP
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406 addresses, the behaviour was not clear when the lookup returned more than
407 one IP address. This has been solved by the addition of == and =& for "all"
93655c46 408 rather than the default "any" matching.
431b7361 409
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410 3. Up till now, the only control over which cipher suites GnuTLS uses has been
411 for the cipher algorithms. New options have been added to allow some of the
412 other parameters to be varied.
431b7361 413
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414 4. There is a new compile-time option called ENABLE_DISABLE_FSYNC. When it is
415 set, Exim compiles a runtime option called disable_fsync.
431b7361 416
4aa45c31 417 5. There is a new variable called $smtp_count_at_connection_start.
431b7361 418
4aa45c31 419 6. There's a new control called no_pipelining.
cf8b11a5 420
41c7c167 421 7. There are two new variables called $sending_ip_address and $sending_port.
4aa45c31 422 These are set whenever an SMTP connection to another host has been set up.
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423
424 8. The expansion of the helo_data option in the smtp transport now happens
4aa45c31 425 after the connection to the server has been made.
41c7c167 426
9c57cbc0 427 9. There is a new expansion operator ${rfc2047d: that decodes strings that
4aa45c31 428 are encoded as per RFC 2047.
9c57cbc0 429
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43010. There is a new log selector called "pid", which causes the current process
431 id to be added to every log line, in square brackets, immediately after the
432 time and date.
433
047bdd8c 43411. Exim has been modified so that it flushes SMTP output before implementing
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435 a delay in an ACL. It also flushes the output before performing a callout,
436 as this can take a substantial time. These behaviours can be disabled by
437 obeying control = no_delay_flush or control = no_callout_flush,
4aa45c31 438 respectively, at some earlier stage of the connection.
047bdd8c 439
0ce9abe6 44012. There are two new expansion conditions that iterate over a list. They are
4aa45c31 441 called forany and forall.
0ce9abe6 442
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44313. There's a new global option called dsn_from that can be used to vary the
444 contents of From: lines in bounces and other automatically generated
445 messages ("delivery status notifications" - hence the name of the option).
0e22dfd1 446
4aa45c31 44714. The smtp transport has a new option called hosts_avoid_pipelining.
c51b8e75 448
75b1493f 44915. By default, exigrep does case-insensitive matches. There is now a -I option
4aa45c31 450 that makes it case-sensitive.
29f89cad 451
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45216. A number of new features ("addresses", "map", "filter", and "reduce") have
453 been added to string expansions to make it easier to process lists of
454 items, typically addresses.
29f89cad 455
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45617. There's a new ACL modifier called "continue". It does nothing of itself,
457 and processing of the ACL always continues with the next condition or
458 modifier. It is provided so that the side effects of expanding its argument
4aa45c31 459 can be used.
c3611384 460
ec95d1a6 46118. It is now possible to use newline and other control characters (those with
4aa45c31 462 values less than 32, plus DEL) as separators in lists.
ec95d1a6 463
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46419. The exigrep utility now has a -v option, which inverts the matching
465 condition.
466
c456d9bb 46720. The host_find_failed option in the manualroute router can now be set to
4aa45c31 468 "ignore".
c456d9bb 469
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470
471Version 4.66
472------------
473
474No new features were added to 4.66.
475
476
477Version 4.65
478------------
479
480No new features were added to 4.65.
481
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482
483Version 4.64
484------------
485
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486 1. ACL variables can now be given arbitrary names, as long as they start with
487 "acl_c" or "acl_m" (for connection variables and message variables), are at
488 least six characters long, with the sixth character being either a digit or
883335dc 489 an underscore.
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490
491 2. There is a new ACL modifier called log_reject_target. It makes it possible
883335dc 492 to specify which logs are used for messages about ACL rejections.
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493
494 3. There is a new authenticator called "dovecot". This is an interface to the
495 authentication facility of the Dovecot POP/IMAP server, which can support a
883335dc 496 number of authentication methods.
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497
498 4. The variable $message_headers_raw provides a concatenation of all the
499 messages's headers without any decoding. This is in contrast to
500 $message_headers, which does RFC2047 decoding on the header contents.
501
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502 5. In a DNS black list, if two domain names, comma-separated, are given, the
503 second is used first to do an initial check, making use of any IP value
504 restrictions that are set. If there is a match, the first domain is used,
505 without any IP value restrictions, to get the TXT record.
af561417 506
883335dc 507 6. All authenticators now have a server_condition option.
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508
509 7. There is a new command-line option called -Mset. It is useful only in
510 conjunction with -be (that is, when testing string expansions). It must be
511 followed by a message id; Exim loads the given message from its spool
883335dc 512 before doing the expansions.
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513
514 8. Another similar new command-line option is called -bem. It operates like
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515 -be except that it must be followed by the name of a file that contains a
516 message.
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517
518 9. When an address is delayed because of a 4xx response to a RCPT command, it
519 is now the combination of sender and recipient that is delayed in
883335dc 520 subsequent queue runs until its retry time is reached.
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521
52210. Unary negation and the bitwise logical operators and, or, xor, not, and
883335dc 523 shift, have been added to the eval: and eval10: expansion items.
48c7f9e2 524
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52511. The variables $interface_address and $interface_port have been renamed
526 as $received_ip_address and $received_port, to make it clear that they
527 relate to message reception rather than delivery. (The old names remain
528 available for compatibility.)
529
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53012. The "message" modifier can now be used on "accept" and "discard" acl verbs
531 to vary the message that is sent when an SMTP command is accepted.
4e88a19f 532
495ae4b0 533
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534Version 4.63
535------------
536
5371. There is a new Boolean option called filter_prepend_home for the redirect
38a0a95f 538 router.
4608d683 539
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5402. There is a new acl, set by acl_not_smtp_start, which is run right at the
541 start of receiving a non-SMTP message, before any of the message has been
38a0a95f 542 read.
45b91596 543
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5443. When an SMTP error message is specified in a "message" modifier in an ACL,
545 or in a :fail: or :defer: message in a redirect router, Exim now checks the
38a0a95f 546 start of the message for an SMTP error code.
a5bd321b 547
6ec97b1b 5484. There is a new parameter for LDAP lookups called "referrals", which takes
38a0a95f 549 one of the settings "follow" (the default) or "nofollow".
6ec97b1b 550
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5515. Version 20070721.2 of exipick now included, offering these new options:
552 --reverse
553 After all other sorting options have bee processed, reverse order
554 before displaying messages (-R is synonym).
555 --random
556 Randomize order of matching messages before displaying.
557 --size
558 Instead of displaying the matching messages, display the sum
559 of their sizes.
560 --sort <variable>[,<variable>...]
561 Before displaying matching messages, sort the messages according to
562 each messages value for each variable.
563 --not
564 Negate the value for every test (returns inverse output from the
565 same criteria without --not).
566
4608d683 567
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568Version 4.62
569------------
570
5711. The ${readsocket expansion item now supports Internet domain sockets as well
572 as Unix domain sockets. If the first argument begins "inet:", it must be of
573 the form "inet:host:port". The port is mandatory; it may be a number or the
574 name of a TCP port in /etc/services. The host may be a name, or it may be an
575 IP address. An ip address may optionally be enclosed in square brackets.
576 This is best for IPv6 addresses. For example:
577
578 ${readsocket{inet:[::1]:1234}{<request data>}...
579
580 Only a single host name may be given, but if looking it up yield more than
581 one IP address, they are each tried in turn until a connection is made. Once
582 a connection has been made, the behaviour is as for ${readsocket with a Unix
583 domain socket.
584
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5852. If a redirect router sets up file or pipe deliveries for more than one
586 incoming address, and the relevant transport has batch_max set greater than
587 one, a batch delivery now occurs.
588
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5893. The appendfile transport has a new option called maildirfolder_create_regex.
590 Its value is a regular expression. For a maildir delivery, this is matched
591 against the maildir directory; if it matches, Exim ensures that a
592 maildirfolder file is created alongside the new, cur, and tmp directories.
593
1cce3af8 594
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595Version 4.61
596------------
597
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598The documentation is up-to-date for the 4.61 release. Major new features since
599the 4.60 release are:
600
601. An option called disable_ipv6, to disable the use of IPv6 completely.
602
603. An increase in the number of ACL variables to 20 of each type.
604
605. A change to use $auth1, $auth2, and $auth3 in authenticators instead of $1,
606 $2, $3, (though those are still set) because the numeric variables get used
607 for other things in complicated expansions.
608
843a41e8 609. The default for rfc1413_query_timeout has been changed from 30s to 5s.
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610
611. It is possible to use setclassresources() on some BSD OS to control the
612 resources used in pipe deliveries.
613
614. A new ACL modifier called add_header, which can be used with any verb.
615
616. More errors are detectable in retry rules.
617
618There are a number of other additions too.
71fafd95 619
7e66e54d 620
425ae40f 621Version 4.60
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622------------
623
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624The documentation is up-to-date for the 4.60 release. Major new features since
625the 4.50 release are:
1a46a8c5 626
425ae40f 627. Support for SQLite.
1a46a8c5 628
425ae40f 629. Support for IGNOREQUOTA in LMTP.
1a46a8c5 630
425ae40f 631. Extensions to the "submission mode" features.
1a46a8c5 632
425ae40f 633. Support for Client SMTP Authorization (CSA).
1a46a8c5 634
425ae40f 635. Support for ratelimiting hosts and users.
b5aea5e1 636
425ae40f 637. New expansion items to help with the BATV "prvs" scheme.
b5aea5e1 638
425ae40f 639. A "match_ip" condition, that matches an IP address against a list.
35edf2ff 640
425ae40f 641There are many more minor changes.
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642
643****