OCSP description: minor nits
[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
b1770b6e 9Version 4.80
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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
3b4f55a3 16 careful use needs to be made of the conditions in Exim.
c1e794ba 17
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18 2. New authenticator driver, "heimdal_gssapi". Server-only.
19 A replacement for using cyrus_sasl with Heimdal, now that $KRB5_KTNAME
20 is no longer honoured for setuid programs by Heimdal. Use the
21 "server_keytab" option to point to the keytab.
22
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23 3. The "pkg-config" system can now be used when building Exim to reference
24 cflags and library information for lookups and authenticators, rather
25 than having to update "CFLAGS", "AUTH_LIBS", "LOOKUP_INCLUDE" and
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26 "LOOKUP_LIBS" directly. Similarly for handling the TLS library support
27 without adjusting "TLS_INCLUDE" and "TLS_LIBS".
252e0c7b 28
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29 In addition, setting PCRE_CONFIG=yes will query the pcre-config tool to
30 find the headers and libraries for PCRE.
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
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36 into the DBM library. Can be used with gsasl to access sasldb2 files as
37 used by Cyrus SASL.
4a6a987a 38
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39 6. OpenSSL now supports TLS1.1 and TLS1.2 with OpenSSL 1.0.1.
40
41 Avoid release 1.0.1a if you can. Note that the default value of
42 "openssl_options" is no longer "+dont_insert_empty_fragments", as that
43 increased susceptibility to attack. This may still have interoperability
44 implications for very old clients (see version 4.31 change 37) but
45 administrators can choose to make the trade-off themselves and restore
46 compatibility at the cost of session security.
47
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48 7. Use of the new expansion variable $tls_sni in the main configuration option
49 tls_certificate will cause Exim to re-expand the option, if the client
50 sends the TLS Server Name Indication extension, to permit choosing a
51 different certificate; tls_privatekey will also be re-expanded. You must
52 still set these options to expand to valid files when $tls_sni is not set.
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53
54 The SMTP Transport has gained the option tls_sni, which will set a hostname
55 for outbound TLS sessions, and set $tls_sni too.
56
57 A new log_selector, +tls_sni, has been added, to log received SNI values
58 for Exim as a server.
59
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60 8. The existing "accept_8bitmime" option now defaults to true. This means
61 that Exim is deliberately not strictly RFC compliant. We're following
62 Dan Bernstein's advice in http://cr.yp.to/smtp/8bitmime.html by default.
63 Those who disagree, or know that they are talking to mail servers that,
64 even today, are not 8-bit clean, need to turn off this option.
65
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66 9. Exim can now be started with -bw (with an optional timeout, given as
67 -bw<timespec>). With this, stdin at startup is a socket that is
68 already listening for connections. This has a more modern name of
69 "socket activation", but forcing the activated socket to fd 0. We're
70 interested in adding more support for modern variants.
71
eae0036b 7210. ${eval } now uses 64-bit values on supporting platforms. A new "G" suffix
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73 for numbers indicates multiplication by 1024^3.
74
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7511. The GnuTLS support has been revamped; the three options gnutls_require_kx,
76 gnutls_require_mac & gnutls_require_protocols are no longer supported.
77 tls_require_ciphers is now parsed by gnutls_priority_init(3) as a priority
78 string, documentation for which is at:
79 http://www.gnu.org/software/gnutls/manual/html_node/Priority-Strings.html
80
81 SNI support has been added to Exim's GnuTLS integration too.
82
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83 For sufficiently recent GnuTLS libraries, ${randint:..} will now use
84 gnutls_rnd(), asking for GNUTLS_RND_NONCE level randomness.
85
53947857 8612. With OpenSSL, if built with EXPERIMENTAL_OCSP, a new option tls_ocsp_file
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87 is now available. If the contents of the file are valid, then Exim will
88 send that back in response to a TLS status request; this is OCSP Stapling.
89 Exim will not maintain the contents of the file in any way: administrators
90 are responsible for ensuring that it is up-to-date.
91
92 See "experimental-spec.txt" for more details.
93
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9413. ${lookup dnsdb{ }} supports now SPF record types. They are handled
95 identically to TXT record lookups.
96
2605c55b 9714. New expansion variable $tod_epoch_l for higher-precision time.
c1e794ba 98
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9915. New global option tls_dh_max_bits, defaulting to current value of NSS
100 hard-coded limit of DH ephemeral bits, to fix interop problems caused by
101 GnuTLS 2.12 library recommending a bit count higher than NSS supports.
102
9e45c72b 103
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104Version 4.77
105------------
106
107 1. New options for the ratelimit ACL condition: /count= and /unique=.
108 The /noupdate option has been replaced by a /readonly option.
109
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110 2. The SMTP transport's protocol option may now be set to "smtps", to
111 use SSL-on-connect outbound.
112
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113 3. New variable $av_failed, set true if the AV scanner deferred; ie, when
114 there is a problem talking to the AV scanner, or the AV scanner running.
115
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116 4. New expansion conditions, "inlist" and "inlisti", which take simple lists
117 and check if the search item is a member of the list. This does not
118 support named lists, but does subject the list part to string expansion.
119
120 5. Unless the new EXPAND_LISTMATCH_RHS build option is set when Exim was
121 built, Exim no longer performs string expansion on the second string of
122 the match_* expansion conditions: "match_address", "match_domain",
123 "match_ip" & "match_local_part". Named lists can still be used.
124
7c6d71af 125
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126Version 4.76
127------------
128
129 1. The global option "dns_use_edns0" may be set to coerce EDNS0 usage on
130 or off in the resolver library.
131
132
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133Version 4.75
134------------
135
136 1. In addition to the existing LDAP and LDAP/SSL ("ldaps") support, there
137 is now LDAP/TLS support, given sufficiently modern OpenLDAP client
138 libraries. The following global options have been added in support of
139 this: ldap_ca_cert_dir, ldap_ca_cert_file, ldap_cert_file, ldap_cert_key,
140 ldap_cipher_suite, ldap_require_cert, ldap_start_tls.
141
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142 2. The pipe transport now takes a boolean option, "freeze_signal", default
143 false. When true, if the external delivery command exits on a signal then
144 Exim will freeze the message in the queue, instead of generating a bounce.
145
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146 3. Log filenames may now use %M as an escape, instead of %D (still available).
147 The %M pattern expands to yyyymm, providing month-level resolution.
148
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149 4. The $message_linecount variable is now updated for the maildir_tag option,
150 in the same way as $message_size, to reflect the real number of lines,
151 including any header additions or removals from transport.
152
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153 5. When contacting a pool of SpamAssassin servers configured in spamd_address,
154 Exim now selects entries randomly, to better scale in a cluster setup.
155
bc19a55b 156
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157Version 4.74
158------------
159
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160 1. SECURITY FIX: privilege escalation flaw fixed. On Linux (and only Linux)
161 the flaw permitted the Exim run-time user to cause root to append to
162 arbitrary files of the attacker's choosing, with the content based
163 on content supplied by the attacker.
164
165 2. Exim now supports loading some lookup types at run-time, using your
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166 platform's dlopen() functionality. This has limited platform support
167 and the intention is not to support every variant, it's limited to
168 dlopen(). This permits the main Exim binary to not be linked against
169 all the libraries needed for all the lookup types.
170
171
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172Version 4.73
173------------
174
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175 NOTE: this version is not guaranteed backwards-compatible, please read the
176 items below carefully
177
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178 1. A new main configuration option, "openssl_options", is available if Exim
179 is built with SSL support provided by OpenSSL. The option allows
180 administrators to specify OpenSSL options to be used on connections;
181 typically this is to set bug compatibility features which the OpenSSL
182 developers have not enabled by default. There may be security
183 consequences for certain options, so these should not be changed
184 frivolously.
185
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186 2. A new pipe transport option, "permit_coredumps", may help with problem
187 diagnosis in some scenarios. Note that Exim is typically installed as
188 a setuid binary, which on most OSes will inhibit coredumps by default,
43236f35 189 so that safety mechanism would have to be overridden for this option to
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190 be able to take effect.
191
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192 3. ClamAV 0.95 is now required for ClamAV support in Exim, unless
193 Local/Makefile sets: WITH_OLD_CLAMAV_STREAM=yes
194 Note that this switches Exim to use a new API ("INSTREAM") and a future
195 release of ClamAV will remove support for the old API ("STREAM").
196
197 The av_scanner option, when set to "clamd", now takes an optional third
198 part, "local", which causes Exim to pass a filename to ClamAV instead of
199 the file content. This is the same behaviour as when clamd is pointed at
200 a Unix-domain socket. For example:
201
202 av_scanner = clamd:192.0.2.3 1234:local
203
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204 ClamAV's ExtendedDetectionInfo response format is now handled.
205
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206 4. There is now a -bmalware option, restricted to admin users. This option
207 takes one parameter, a filename, and scans that file with Exim's
208 malware-scanning framework. This is intended purely as a debugging aid
209 to ensure that Exim's scanning is working, not to replace other tools.
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210 Note that the ACL framework is not invoked, so if av_scanner references
211 ACL variables without a fallback then this will fail.
8544e77a 212
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213 5. There is a new expansion operator, "reverse_ip", which will reverse IP
214 addresses; IPv4 into dotted quad, IPv6 into dotted nibble. Examples:
215
216 ${reverse_ip:192.0.2.4}
217 -> 4.2.0.192
218 ${reverse_ip:2001:0db8:c42:9:1:abcd:192.0.2.3}
219 -> 3.0.2.0.0.0.0.c.d.c.b.a.1.0.0.0.9.0.0.0.2.4.c.0.8.b.d.0.1.0.0.2
220
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221 6. There is a new ACL control called "debug", to enable debug logging.
222 This allows selective logging of certain incoming transactions within
223 production environments, with some care. It takes two options, "tag"
224 and "opts"; "tag" is included in the filename of the log and "opts"
225 is used as per the -d<options> command-line option. Examples, which
226 don't all make sense in all contexts:
227
228 control = debug
229 control = debug/tag=.$sender_host_address
230 control = debug/opts=+expand+acl
231 control = debug/tag=.$message_exim_id/opts=+expand
232
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233 7. It has always been implicit in the design and the documentation that
234 "the Exim user" is not root. src/EDITME said that using root was
235 "very strongly discouraged". This is not enough to keep people from
236 shooting themselves in the foot in days when many don't configure Exim
237 themselves but via package build managers. The security consequences of
238 running various bits of network code are severe if there should be bugs in
239 them. As such, the Exim user may no longer be root. If configured
240 statically, Exim will refuse to build. If configured as ref:user then Exim
241 will exit shortly after start-up. If you must shoot yourself in the foot,
242 then henceforth you will have to maintain your own local patches to strip
243 the safeties off.
244
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245 8. There is a new expansion operator, bool_lax{}. Where bool{} uses the ACL
246 condition logic to determine truth/failure and will fail to expand many
247 strings, bool_lax{} uses the router condition logic, where most strings
248 do evaluate true.
249 Note: bool{00} is false, bool_lax{00} is true.
250
251 9. Routers now support multiple "condition" tests,
532be449 252
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25310. There is now a runtime configuration option "tcp_wrappers_daemon_name".
254 Setting this allows an admin to define which entry in the tcpwrappers
255 config file will be used to control access to the daemon. This option
256 is only available when Exim is built with USE_TCP_WRAPPERS. The
257 default value is set at build time using the TCP_WRAPPERS_DAEMON_NAME
258 build option.
259
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26011. [POSSIBLE CONFIG BREAKAGE] The default value for system_filter_user is now
261 the Exim run-time user, instead of root.
262
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26312. [POSSIBLE CONFIG BREAKAGE] ALT_CONFIG_ROOT_ONLY is no longer optional and
264 is forced on. This is mitigated by the new build option
90b6341f 265 TRUSTED_CONFIG_LIST which defines a list of configuration files which
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266 are trusted; one per line. If a config file is owned by root and matches
267 a pathname in the list, then it may be invoked by the Exim build-time
268 user without Exim relinquishing root privileges.
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269
27013. [POSSIBLE CONFIG BREAKAGE] The Exim user is no longer automatically
271 trusted to supply -D<Macro[=Value]> overrides on the command-line. Going
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272 forward, we recommend using TRUSTED_CONFIG_LIST with shim configs that
273 include the main config. As a transition mechanism, we are temporarily
274 providing a work-around: the new build option WHITELIST_D_MACROS provides
43236f35 275 a colon-separated list of macro names which may be overridden by the Exim
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276 run-time user. The values of these macros are constrained to the regex
277 ^[A-Za-z0-9_/.-]*$ (which explicitly does allow for empty values).
2cfd3221 278
77bb000f 279
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280Version 4.72
281------------
282
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283 1. TWO SECURITY FIXES: one relating to mail-spools which are globally
284 writable, the other to locking of MBX folders (not mbox).
285
286 2. MySQL stored procedures are now supported.
287
288 3. The dkim_domain transport option is now a list, not a single string, and
289 messages will be signed for each element in the list (discarding
290 duplicates).
291
292 4. The 4.70 release unexpectedly changed the behaviour of dnsdb TXT lookups
293 in the presence of multiple character strings within the RR. Prior to 4.70,
294 only the first string would be returned. The dnsdb lookup now, by default,
295 preserves the pre-4.70 semantics, but also now takes an extended output
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296 separator specification. The separator can be followed by a semicolon, to
297 concatenate the individual text strings together with no join character,
298 or by a comma and a second separator character, in which case the text
299 strings within a TXT record are joined on that second character.
300 Administrators are reminded that DNS provides no ordering guarantees
301 between multiple records in an RRset. For example:
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302
303 foo.example. IN TXT "a" "b" "c"
304 foo.example. IN TXT "d" "e" "f"
305
306 ${lookup dnsdb{>/ txt=foo.example}} -> "a/d"
307 ${lookup dnsdb{>/; txt=foo.example}} -> "def/abc"
8f425947 308 ${lookup dnsdb{>/,+ txt=foo.example}} -> "a+b+c/d+e+f"
b26eacf1 309
3fc596e4 310
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311Version 4.70 / 4.71
312-------------------
65a7d8c3 313
7c6d71af 314 1. Native DKIM support without an external library.
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315 (Note that if no action to prevent it is taken, a straight upgrade will
316 result in DKIM verification of all signed incoming emails. See spec
317 for details on conditionally disabling)
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318
319 2. Experimental DCC support via dccifd (contributed by Wolfgang Breyha).
65a7d8c3 320
f33253cc 321 3. There is now a bool{} expansion condition which maps certain strings to
7d9f747b 322 true/false condition values (most likely of use in conjunction with the
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323 and{} expansion operator).
324
325 4. The $spam_score, $spam_bar and $spam_report variables are now available
326 at delivery time.
327
328 5. exim -bP now supports "macros", "macro_list" or "macro MACRO_NAME" as
329 options, provided that Exim is invoked by an admin_user.
330
331 6. There is a new option gnutls_compat_mode, when linked against GnuTLS,
332 which increases compatibility with older clients at the cost of decreased
333 security. Don't set this unless you need to support such clients.
334
335 7. There is a new expansion operator, ${randint:...} which will produce a
336 "random" number less than the supplied integer. This randomness is
337 not guaranteed to be cryptographically strong, but depending upon how
338 Exim was built may be better than the most naive schemes.
339
340 8. Exim now explicitly ensures that SHA256 is available when linked against
341 OpenSSL.
342
343 9. The transport_filter_timeout option now applies to SMTP transports too.
344
65a7d8c3 345
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346Version 4.69
347------------
348
349 1. Preliminary DKIM support in Experimental.
350
351
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352Version 4.68
353------------
354
355 1. The body_linecount and body_zerocount C variables are now exported in the
356 local_scan API.
357
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358 2. When a dnslists lookup succeeds, the key that was looked up is now placed
359 in $dnslist_matched. When the key is an IP address, it is not reversed in
360 this variable (though it is, of course, in the actual lookup). In simple
361 cases, for example:
362
363 deny dnslists = spamhaus.example
364
365 the key is also available in another variable (in this case,
366 $sender_host_address). In more complicated cases, however, this is not
367 true. For example, using a data lookup might generate a dnslists lookup
368 like this:
369
370 deny dnslists = spamhaus.example/<|192.168.1.2|192.168.6.7|...
371
372 If this condition succeeds, the value in $dnslist_matched might be
373 192.168.6.7 (for example).
374
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375 3. Authenticators now have a client_condition option. When Exim is running as
376 a client, it skips an authenticator whose client_condition expansion yields
377 "0", "no", or "false". This can be used, for example, to skip plain text
378 authenticators when the connection is not encrypted by a setting such as:
379
380 client_condition = ${if !eq{$tls_cipher}{}}
381
382 Note that the 4.67 documentation states that $tls_cipher contains the
383 cipher used for incoming messages. In fact, during SMTP delivery, it
384 contains the cipher used for the delivery. The same is true for
385 $tls_peerdn.
386
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387 4. There is now a -Mvc <message-id> option, which outputs a copy of the
388 message to the standard output, in RFC 2822 format. The option can be used
389 only by an admin user.
390
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391 5. There is now a /noupdate option for the ratelimit ACL condition. It
392 computes the rate and checks the limit as normal, but it does not update
393 the saved data. This means that, in relevant ACLs, it is possible to lookup
394 the existence of a specified (or auto-generated) ratelimit key without
395 incrementing the ratelimit counter for that key.
396
397 In order for this to be useful, another ACL entry must set the rate
398 for the same key somewhere (otherwise it will always be zero).
399
400 Example:
401
402 acl_check_connect:
403 # Read the rate; if it doesn't exist or is below the maximum
404 # we update it below
405 deny ratelimit = 100 / 5m / strict / noupdate
406 log_message = RATE: $sender_rate / $sender_rate_period \
407 (max $sender_rate_limit)
408
409 [... some other logic and tests...]
410
411 warn ratelimit = 100 / 5m / strict / per_cmd
412 log_message = RATE UPDATE: $sender_rate / $sender_rate_period \
413 (max $sender_rate_limit)
414 condition = ${if le{$sender_rate}{$sender_rate_limit}}
415
416 accept
417
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418 6. The variable $max_received_linelength contains the number of bytes in the
419 longest line that was received as part of the message, not counting the
420 line termination character(s).
421
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422 7. Host lists can now include +ignore_defer and +include_defer, analagous to
423 +ignore_unknown and +include_unknown. These options should be used with
424 care, probably only in non-critical host lists such as whitelists.
425
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426 8. There's a new option called queue_only_load_latch, which defaults true.
427 If set false when queue_only_load is greater than zero, Exim re-evaluates
428 the load for each incoming message in an SMTP session. Otherwise, once one
429 message is queued, the remainder are also.
430
4f054c63 431 9. There is a new ACL, specified by acl_smtp_notquit, which is run in most
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432 cases when an SMTP session ends without sending QUIT. However, when Exim
433 itself is is bad trouble, such as being unable to write to its log files,
434 this ACL is not run, because it might try to do things (such as write to
435 log files) that make the situation even worse.
436
437 Like the QUIT ACL, this new ACL is provided to make it possible to gather
438 statistics. Whatever it returns (accept or deny) is immaterial. The "delay"
439 modifier is forbidden in this ACL.
440
441 When the NOTQUIT ACL is running, the variable $smtp_notquit_reason is set
442 to a string that indicates the reason for the termination of the SMTP
443 connection. The possible values are:
444
445 acl-drop Another ACL issued a "drop" command
446 bad-commands Too many unknown or non-mail commands
447 command-timeout Timeout while reading SMTP commands
448 connection-lost The SMTP connection has been lost
449 data-timeout Timeout while reading message data
450 local-scan-error The local_scan() function crashed
451 local-scan-timeout The local_scan() function timed out
452 signal-exit SIGTERM or SIGINT
453 synchronization-error SMTP synchronization error
454 tls-failed TLS failed to start
455
456 In most cases when an SMTP connection is closed without having received
457 QUIT, Exim sends an SMTP response message before actually closing the
458 connection. With the exception of acl-drop, the default message can be
459 overridden by the "message" modifier in the NOTQUIT ACL. In the case of a
460 "drop" verb in another ACL, it is the message from the other ACL that is
461 used.
462
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46310. For MySQL and PostgreSQL lookups, it is now possible to specify a list of
464 servers with individual queries. This is done by starting the query with
465 "servers=x:y:z;", where each item in the list may take one of two forms:
466
467 (1) If it is just a host name, the appropriate global option (mysql_servers
468 or pgsql_servers) is searched for a host of the same name, and the
469 remaining parameters (database, user, password) are taken from there.
470
471 (2) If it contains any slashes, it is taken as a complete parameter set.
472
473 The list of servers is used in exactly the same was as the global list.
474 Once a connection to a server has happened and a query has been
475 successfully executed, processing of the lookup ceases.
476
477 This feature is intended for use in master/slave situations where updates
478 are occurring, and one wants to update a master rather than a slave. If the
479 masters are in the list for reading, you might have:
480
481 mysql_servers = slave1/db/name/pw:slave2/db/name/pw:master/db/name/pw
482
483 In an updating lookup, you could then write
484
485 ${lookup mysql{servers=master; UPDATE ...}
486
487 If, on the other hand, the master is not to be used for reading lookups:
488
489 pgsql_servers = slave1/db/name/pw:slave2/db/name/pw
490
491 you can still update the master by
492
493 ${lookup pgsql{servers=master/db/name/pw; UPDATE ...}
494
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49511. The message_body_newlines option (default FALSE, for backwards
496 compatibility) can be used to control whether newlines are present in
497 $message_body and $message_body_end. If it is FALSE, they are replaced by
498 spaces.
499
2b85bce7 500
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501Version 4.67
502------------
503
504 1. There is a new log selector called smtp_no_mail, which is not included in
505 the default setting. When it is set, a line is written to the main log
506 whenever an accepted SMTP connection terminates without having issued a
4aa45c31 507 MAIL command.
b4ed4da0 508
431b7361 509 2. When an item in a dnslists list is followed by = and & and a list of IP
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510 addresses, the behaviour was not clear when the lookup returned more than
511 one IP address. This has been solved by the addition of == and =& for "all"
93655c46 512 rather than the default "any" matching.
431b7361 513
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514 3. Up till now, the only control over which cipher suites GnuTLS uses has been
515 for the cipher algorithms. New options have been added to allow some of the
516 other parameters to be varied.
431b7361 517
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518 4. There is a new compile-time option called ENABLE_DISABLE_FSYNC. When it is
519 set, Exim compiles a runtime option called disable_fsync.
431b7361 520
4aa45c31 521 5. There is a new variable called $smtp_count_at_connection_start.
431b7361 522
4aa45c31 523 6. There's a new control called no_pipelining.
cf8b11a5 524
41c7c167 525 7. There are two new variables called $sending_ip_address and $sending_port.
4aa45c31 526 These are set whenever an SMTP connection to another host has been set up.
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527
528 8. The expansion of the helo_data option in the smtp transport now happens
4aa45c31 529 after the connection to the server has been made.
41c7c167 530
9c57cbc0 531 9. There is a new expansion operator ${rfc2047d: that decodes strings that
4aa45c31 532 are encoded as per RFC 2047.
9c57cbc0 533
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53410. There is a new log selector called "pid", which causes the current process
535 id to be added to every log line, in square brackets, immediately after the
536 time and date.
537
047bdd8c 53811. Exim has been modified so that it flushes SMTP output before implementing
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539 a delay in an ACL. It also flushes the output before performing a callout,
540 as this can take a substantial time. These behaviours can be disabled by
541 obeying control = no_delay_flush or control = no_callout_flush,
4aa45c31 542 respectively, at some earlier stage of the connection.
047bdd8c 543
0ce9abe6 54412. There are two new expansion conditions that iterate over a list. They are
4aa45c31 545 called forany and forall.
0ce9abe6 546
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54713. There's a new global option called dsn_from that can be used to vary the
548 contents of From: lines in bounces and other automatically generated
549 messages ("delivery status notifications" - hence the name of the option).
0e22dfd1 550
4aa45c31 55114. The smtp transport has a new option called hosts_avoid_pipelining.
c51b8e75 552
75b1493f 55315. By default, exigrep does case-insensitive matches. There is now a -I option
4aa45c31 554 that makes it case-sensitive.
29f89cad 555
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55616. A number of new features ("addresses", "map", "filter", and "reduce") have
557 been added to string expansions to make it easier to process lists of
558 items, typically addresses.
29f89cad 559
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56017. There's a new ACL modifier called "continue". It does nothing of itself,
561 and processing of the ACL always continues with the next condition or
562 modifier. It is provided so that the side effects of expanding its argument
4aa45c31 563 can be used.
c3611384 564
ec95d1a6 56518. It is now possible to use newline and other control characters (those with
4aa45c31 566 values less than 32, plus DEL) as separators in lists.
ec95d1a6 567
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56819. The exigrep utility now has a -v option, which inverts the matching
569 condition.
570
c456d9bb 57120. The host_find_failed option in the manualroute router can now be set to
4aa45c31 572 "ignore".
c456d9bb 573
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574
575Version 4.66
576------------
577
578No new features were added to 4.66.
579
580
581Version 4.65
582------------
583
584No new features were added to 4.65.
585
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586
587Version 4.64
588------------
589
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590 1. ACL variables can now be given arbitrary names, as long as they start with
591 "acl_c" or "acl_m" (for connection variables and message variables), are at
592 least six characters long, with the sixth character being either a digit or
883335dc 593 an underscore.
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594
595 2. There is a new ACL modifier called log_reject_target. It makes it possible
883335dc 596 to specify which logs are used for messages about ACL rejections.
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597
598 3. There is a new authenticator called "dovecot". This is an interface to the
599 authentication facility of the Dovecot POP/IMAP server, which can support a
883335dc 600 number of authentication methods.
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601
602 4. The variable $message_headers_raw provides a concatenation of all the
603 messages's headers without any decoding. This is in contrast to
604 $message_headers, which does RFC2047 decoding on the header contents.
605
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606 5. In a DNS black list, if two domain names, comma-separated, are given, the
607 second is used first to do an initial check, making use of any IP value
608 restrictions that are set. If there is a match, the first domain is used,
609 without any IP value restrictions, to get the TXT record.
af561417 610
883335dc 611 6. All authenticators now have a server_condition option.
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612
613 7. There is a new command-line option called -Mset. It is useful only in
614 conjunction with -be (that is, when testing string expansions). It must be
615 followed by a message id; Exim loads the given message from its spool
883335dc 616 before doing the expansions.
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617
618 8. Another similar new command-line option is called -bem. It operates like
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619 -be except that it must be followed by the name of a file that contains a
620 message.
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621
622 9. When an address is delayed because of a 4xx response to a RCPT command, it
623 is now the combination of sender and recipient that is delayed in
883335dc 624 subsequent queue runs until its retry time is reached.
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625
62610. Unary negation and the bitwise logical operators and, or, xor, not, and
883335dc 627 shift, have been added to the eval: and eval10: expansion items.
48c7f9e2 628
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62911. The variables $interface_address and $interface_port have been renamed
630 as $received_ip_address and $received_port, to make it clear that they
631 relate to message reception rather than delivery. (The old names remain
632 available for compatibility.)
633
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63412. The "message" modifier can now be used on "accept" and "discard" acl verbs
635 to vary the message that is sent when an SMTP command is accepted.
4e88a19f 636
495ae4b0 637
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638Version 4.63
639------------
640
6411. There is a new Boolean option called filter_prepend_home for the redirect
38a0a95f 642 router.
4608d683 643
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6442. There is a new acl, set by acl_not_smtp_start, which is run right at the
645 start of receiving a non-SMTP message, before any of the message has been
38a0a95f 646 read.
45b91596 647
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6483. When an SMTP error message is specified in a "message" modifier in an ACL,
649 or in a :fail: or :defer: message in a redirect router, Exim now checks the
38a0a95f 650 start of the message for an SMTP error code.
a5bd321b 651
6ec97b1b 6524. There is a new parameter for LDAP lookups called "referrals", which takes
38a0a95f 653 one of the settings "follow" (the default) or "nofollow".
6ec97b1b 654
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6555. Version 20070721.2 of exipick now included, offering these new options:
656 --reverse
657 After all other sorting options have bee processed, reverse order
658 before displaying messages (-R is synonym).
659 --random
660 Randomize order of matching messages before displaying.
661 --size
662 Instead of displaying the matching messages, display the sum
663 of their sizes.
664 --sort <variable>[,<variable>...]
665 Before displaying matching messages, sort the messages according to
666 each messages value for each variable.
667 --not
668 Negate the value for every test (returns inverse output from the
669 same criteria without --not).
670
4608d683 671
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672Version 4.62
673------------
674
6751. The ${readsocket expansion item now supports Internet domain sockets as well
676 as Unix domain sockets. If the first argument begins "inet:", it must be of
677 the form "inet:host:port". The port is mandatory; it may be a number or the
678 name of a TCP port in /etc/services. The host may be a name, or it may be an
679 IP address. An ip address may optionally be enclosed in square brackets.
680 This is best for IPv6 addresses. For example:
681
682 ${readsocket{inet:[::1]:1234}{<request data>}...
683
684 Only a single host name may be given, but if looking it up yield more than
685 one IP address, they are each tried in turn until a connection is made. Once
686 a connection has been made, the behaviour is as for ${readsocket with a Unix
687 domain socket.
688
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6892. If a redirect router sets up file or pipe deliveries for more than one
690 incoming address, and the relevant transport has batch_max set greater than
691 one, a batch delivery now occurs.
692
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6933. The appendfile transport has a new option called maildirfolder_create_regex.
694 Its value is a regular expression. For a maildir delivery, this is matched
695 against the maildir directory; if it matches, Exim ensures that a
696 maildirfolder file is created alongside the new, cur, and tmp directories.
697
1cce3af8 698
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699Version 4.61
700------------
701
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702The documentation is up-to-date for the 4.61 release. Major new features since
703the 4.60 release are:
704
705. An option called disable_ipv6, to disable the use of IPv6 completely.
706
707. An increase in the number of ACL variables to 20 of each type.
708
709. A change to use $auth1, $auth2, and $auth3 in authenticators instead of $1,
710 $2, $3, (though those are still set) because the numeric variables get used
711 for other things in complicated expansions.
712
843a41e8 713. The default for rfc1413_query_timeout has been changed from 30s to 5s.
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714
715. It is possible to use setclassresources() on some BSD OS to control the
716 resources used in pipe deliveries.
717
718. A new ACL modifier called add_header, which can be used with any verb.
719
720. More errors are detectable in retry rules.
721
722There are a number of other additions too.
71fafd95 723
7e66e54d 724
425ae40f 725Version 4.60
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726------------
727
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728The documentation is up-to-date for the 4.60 release. Major new features since
729the 4.50 release are:
1a46a8c5 730
425ae40f 731. Support for SQLite.
1a46a8c5 732
425ae40f 733. Support for IGNOREQUOTA in LMTP.
1a46a8c5 734
425ae40f 735. Extensions to the "submission mode" features.
1a46a8c5 736
425ae40f 737. Support for Client SMTP Authorization (CSA).
1a46a8c5 738
425ae40f 739. Support for ratelimiting hosts and users.
b5aea5e1 740
425ae40f 741. New expansion items to help with the BATV "prvs" scheme.
b5aea5e1 742
425ae40f 743. A "match_ip" condition, that matches an IP address against a list.
35edf2ff 744
425ae40f 745There are many more minor changes.
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746
747****