1 $Cambridge: exim/doc/doc-txt/NewStuff,v 1.147 2007/06/14 13:27:11 ph10 Exp $
6 This file contains descriptions of new features that have been added to Exim.
7 Before a formal release, there may be quite a lot of detail so that people can
8 test from the snapshots or the CVS before the documentation is updated. Once
9 the documentation is updated, this file is reduced to a short list.
14 1. The body_linecount and body_zerocount C variables are now exported in the
21 1. There is a new log selector called smtp_no_mail, which is not included in
22 the default setting. When it is set, a line is written to the main log
23 whenever an accepted SMTP connection terminates without having issued a
26 2. When an item in a dnslists list is followed by = and & and a list of IP
27 addresses, the behaviour was not clear when the lookup returned more than
28 one IP address. This has been solved by the addition of == and =& for "all"
29 rather than the defaule "any" matching.
31 3. Up till now, the only control over which cipher suites GnuTLS uses has been
32 for the cipher algorithms. New options have been added to allow some of the
33 other parameters to be varied.
35 4. There is a new compile-time option called ENABLE_DISABLE_FSYNC. When it is
36 set, Exim compiles a runtime option called disable_fsync.
38 5. There is a new variable called $smtp_count_at_connection_start.
40 6. There's a new control called no_pipelining.
42 7. There are two new variables called $sending_ip_address and $sending_port.
43 These are set whenever an SMTP connection to another host has been set up.
45 8. The expansion of the helo_data option in the smtp transport now happens
46 after the connection to the server has been made.
48 9. There is a new expansion operator ${rfc2047d: that decodes strings that
49 are encoded as per RFC 2047.
51 10. There is a new log selector called "pid", which causes the current process
52 id to be added to every log line, in square brackets, immediately after the
55 11. Exim has been modified so that it flushes SMTP output before implementing
56 a delay in an ACL. It also flushes the output before performing a callout,
57 as this can take a substantial time. These behaviours can be disabled by
58 obeying control = no_delay_flush or control = no_callout_flush,
59 respectively, at some earlier stage of the connection.
61 12. There are two new expansion conditions that iterate over a list. They are
62 called forany and forall.
64 13. There's a new global option called dsn_from that can be used to vary the
65 contents of From: lines in bounces and other automatically generated
66 messages ("delivery status notifications" - hence the name of the option).
68 14. The smtp transport has a new option called hosts_avoid_pipelining.
70 15. By default, exigrep does case-insensitive matches. There is now a -I option
71 that makes it case-sensitive.
73 16. A number of new features ("addresses", "map", "filter", and "reduce") have
74 been added to string expansions to make it easier to process lists of
75 items, typically addresses.
77 17. There's a new ACL modifier called "continue". It does nothing of itself,
78 and processing of the ACL always continues with the next condition or
79 modifier. It is provided so that the side effects of expanding its argument
82 18. It is now possible to use newline and other control characters (those with
83 values less than 32, plus DEL) as separators in lists.
85 19. The exigrep utility now has a -v option, which inverts the matching
88 20. The host_find_failed option in the manualroute router can now be set to
95 No new features were added to 4.66.
101 No new features were added to 4.65.
107 1. ACL variables can now be given arbitrary names, as long as they start with
108 "acl_c" or "acl_m" (for connection variables and message variables), are at
109 least six characters long, with the sixth character being either a digit or
112 2. There is a new ACL modifier called log_reject_target. It makes it possible
113 to specify which logs are used for messages about ACL rejections.
115 3. There is a new authenticator called "dovecot". This is an interface to the
116 authentication facility of the Dovecot POP/IMAP server, which can support a
117 number of authentication methods.
119 4. The variable $message_headers_raw provides a concatenation of all the
120 messages's headers without any decoding. This is in contrast to
121 $message_headers, which does RFC2047 decoding on the header contents.
123 5. In a DNS black list, if two domain names, comma-separated, are given, the
124 second is used first to do an initial check, making use of any IP value
125 restrictions that are set. If there is a match, the first domain is used,
126 without any IP value restrictions, to get the TXT record.
128 6. All authenticators now have a server_condition option.
130 7. There is a new command-line option called -Mset. It is useful only in
131 conjunction with -be (that is, when testing string expansions). It must be
132 followed by a message id; Exim loads the given message from its spool
133 before doing the expansions.
135 8. Another similar new command-line option is called -bem. It operates like
136 -be except that it must be followed by the name of a file that contains a
139 9. When an address is delayed because of a 4xx response to a RCPT command, it
140 is now the combination of sender and recipient that is delayed in
141 subsequent queue runs until its retry time is reached.
143 10. Unary negation and the bitwise logical operators and, or, xor, not, and
144 shift, have been added to the eval: and eval10: expansion items.
146 11. The variables $interface_address and $interface_port have been renamed
147 as $received_ip_address and $received_port, to make it clear that they
148 relate to message reception rather than delivery. (The old names remain
149 available for compatibility.)
151 12. The "message" modifier can now be used on "accept" and "discard" acl verbs
152 to vary the message that is sent when an SMTP command is accepted.
158 1. There is a new Boolean option called filter_prepend_home for the redirect
161 2. There is a new acl, set by acl_not_smtp_start, which is run right at the
162 start of receiving a non-SMTP message, before any of the message has been
165 3. When an SMTP error message is specified in a "message" modifier in an ACL,
166 or in a :fail: or :defer: message in a redirect router, Exim now checks the
167 start of the message for an SMTP error code.
169 4. There is a new parameter for LDAP lookups called "referrals", which takes
170 one of the settings "follow" (the default) or "nofollow".
172 5. Version 20070721.2 of exipick now included, offering these new options:
174 After all other sorting options have bee processed, reverse order
175 before displaying messages (-R is synonym).
177 Randomize order of matching messages before displaying.
179 Instead of displaying the matching messages, display the sum
181 --sort <variable>[,<variable>...]
182 Before displaying matching messages, sort the messages according to
183 each messages value for each variable.
185 Negate the value for every test (returns inverse output from the
186 same criteria without --not).
192 1. The ${readsocket expansion item now supports Internet domain sockets as well
193 as Unix domain sockets. If the first argument begins "inet:", it must be of
194 the form "inet:host:port". The port is mandatory; it may be a number or the
195 name of a TCP port in /etc/services. The host may be a name, or it may be an
196 IP address. An ip address may optionally be enclosed in square brackets.
197 This is best for IPv6 addresses. For example:
199 ${readsocket{inet:[::1]:1234}{<request data>}...
201 Only a single host name may be given, but if looking it up yield more than
202 one IP address, they are each tried in turn until a connection is made. Once
203 a connection has been made, the behaviour is as for ${readsocket with a Unix
206 2. If a redirect router sets up file or pipe deliveries for more than one
207 incoming address, and the relevant transport has batch_max set greater than
208 one, a batch delivery now occurs.
210 3. The appendfile transport has a new option called maildirfolder_create_regex.
211 Its value is a regular expression. For a maildir delivery, this is matched
212 against the maildir directory; if it matches, Exim ensures that a
213 maildirfolder file is created alongside the new, cur, and tmp directories.
219 The documentation is up-to-date for the 4.61 release. Major new features since
220 the 4.60 release are:
222 . An option called disable_ipv6, to disable the use of IPv6 completely.
224 . An increase in the number of ACL variables to 20 of each type.
226 . A change to use $auth1, $auth2, and $auth3 in authenticators instead of $1,
227 $2, $3, (though those are still set) because the numeric variables get used
228 for other things in complicated expansions.
230 . The default for rfc1413_query_timeout has been changed from 30s to 5s.
232 . It is possible to use setclassresources() on some BSD OS to control the
233 resources used in pipe deliveries.
235 . A new ACL modifier called add_header, which can be used with any verb.
237 . More errors are detectable in retry rules.
239 There are a number of other additions too.
245 The documentation is up-to-date for the 4.60 release. Major new features since
246 the 4.50 release are:
248 . Support for SQLite.
250 . Support for IGNOREQUOTA in LMTP.
252 . Extensions to the "submission mode" features.
254 . Support for Client SMTP Authorization (CSA).
256 . Support for ratelimiting hosts and users.
258 . New expansion items to help with the BATV "prvs" scheme.
260 . A "match_ip" condition, that matches an IP address against a list.
262 There are many more minor changes.