doc/doc-txt/NewStuff

   1 $Cambridge: exim/doc/doc-txt/NewStuff,v 1.114 2006/10/03 08:54:50 ph10 Exp $
   2
   3 New Features in Exim
   4 --------------------
   5
   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.
  10
  11
  12 Version 4.64
  13 ------------
  14
  15 1. ACL variables can now be given arbitrary names, as long as they start with
  16    "acl_c" or "acl_m" (for connection variables and message variables), are
  17    at least six characters long, with the sixth character being either a digit
  18    or an underscore. The rest of the name can contain alphanumeric characters
  19    and underscores. This is a compatible change because the old set of
  20    variables such as acl_m12 are a subset of the allowed names. There may now
  21    be any number of ACL variables. For example:
  22
  23      set acl_c13   = value for original ACL variable
  24      set acl_c13b  = whatever
  25      set acl_m_foo = something
  26
  27    What happens if a syntactically valid but undefined ACL variable is
  28    referenced depends on the setting of the strict_acl_vars option. If it is
  29    false (the default), an empty string is substituted; if it is true, an error
  30    is generated. This affects all ACL variables, including the "old" ones such
  31    as acl_c4. (Previously there wasn't the concept of an undefined ACL
  32    variable.)
  33
  34    The implementation has been done in such a way that spool files containing
  35    ACL variable settings written by previous releases of Exim are compatible
  36    and can be read by the new release. If only the original numeric names are
  37    used, spool files written by the new release can be read by earlier
  38    releases.
  39
  40 2. There is a new ACL modifier called log_reject_target. It makes it possible
  41    to specify which logs are used for messages about ACL rejections. Its
  42    argument is a list of words which can be "main", "reject", or "panic". The
  43    default is "main:reject". The list may be empty, in which case a rejection
  44    is not logged at all. For example, this ACL fragment writes no logging
  45    information when access is denied:
  46
  47      deny <some conditions>
  48           log_reject_target =
  49
  50    The modifier can be used in SMTP and non-SMTP ACLs. It applies to both
  51    permanent and temporary rejections.
  52
  53 3. There is a new authenticator called "dovecot". This is an interface to the
  54    authentication facility of the Dovecot POP/IMAP server, which can support a
  55    number of authentication methods. If you are using Dovecot to authenticate
  56    POP/IMAP clients, it might be helpful to use the same mechanisms for SMTP
  57    authentication. This is a server authenticator only. The only option is
  58    server_socket, which must specify the socket which is the interface to
  59    Dovecot authentication. The public_name option must specify an
  60    authentication mechanism that Dovecot is configured to support. You can have
  61    several authenticators for different mechanisms. For example:
  62
  63      dovecot_plain:
  64        driver = dovecot
  65        public_name = PLAIN
  66        server_name = /var/run/dovecot/auth-client
  67        server_setid = $auth1
  68
  69      dovecot_ntlm:
  70        driver = dovecot
  71        public_name = NTLM
  72        server_name = /var/run/dovecot/auth-client
  73        server_setid = $auth1
  74
  75 4. The variable $message_headers_raw provides a concatenation of all the
  76    messages's headers without any decoding. This is in contrast to
  77    $message_headers, which does RFC2047 encoding on the header contents.
  78
  79
  80 Version 4.63
  81 ------------
  82
  83 1. There is a new Boolean option called filter_prepend_home for the redirect
  84    router.
  85
  86 2. There is a new acl, set by acl_not_smtp_start, which is run right at the
  87    start of receiving a non-SMTP message, before any of the message has been
  88    read.
  89
  90 3. When an SMTP error message is specified in a "message" modifier in an ACL,
  91    or in a :fail: or :defer: message in a redirect router, Exim now checks the
  92    start of the message for an SMTP error code.
  93
  94 4. There is a new parameter for LDAP lookups called "referrals", which takes
  95    one of the settings "follow" (the default) or "nofollow".
  96
  97 5. Version 20070721.2 of exipick now included, offering these new options:
  98     --reverse
  99         After all other sorting options have bee processed, reverse order
 100         before displaying messages (-R is synonym).
 101     --random
 102         Randomize order of matching messages before displaying.
 103     --size
 104         Instead of displaying the matching messages, display the sum
 105         of their sizes.
 106     --sort <variable>[,<variable>...]
 107         Before displaying matching messages, sort the messages according to
 108         each messages value for each variable.
 109     --not
 110         Negate the value for every test (returns inverse output from the
 111         same criteria without --not).
 112
 113
 114 Version 4.62
 115 ------------
 116
 117 1. The ${readsocket expansion item now supports Internet domain sockets as well
 118    as Unix domain sockets. If the first argument begins "inet:", it must be of
 119    the form "inet:host:port". The port is mandatory; it may be a number or the
 120    name of a TCP port in /etc/services. The host may be a name, or it may be an
 121    IP address. An ip address may optionally be enclosed in square brackets.
 122    This is best for IPv6 addresses. For example:
 123
 124      ${readsocket{inet:[::1]:1234}{<request data>}...
 125
 126    Only a single host name may be given, but if looking it up yield more than
 127    one IP address, they are each tried in turn until a connection is made. Once
 128    a connection has been made, the behaviour is as for ${readsocket with a Unix
 129    domain socket.
 130
 131 2. If a redirect router sets up file or pipe deliveries for more than one
 132    incoming address, and the relevant transport has batch_max set greater than
 133    one, a batch delivery now occurs.
 134
 135 3. The appendfile transport has a new option called maildirfolder_create_regex.
 136    Its value is a regular expression. For a maildir delivery, this is matched
 137    against the maildir directory; if it matches, Exim ensures that a
 138    maildirfolder file is created alongside the new, cur, and tmp directories.
 139
 140
 141 Version 4.61
 142 ------------
 143
 144 The documentation is up-to-date for the 4.61 release. Major new features since
 145 the 4.60 release are:
 146
 147 . An option called disable_ipv6, to disable the use of IPv6 completely.
 148
 149 . An increase in the number of ACL variables to 20 of each type.
 150
 151 . A change to use $auth1, $auth2, and $auth3 in authenticators instead of $1,
 152   $2, $3, (though those are still set) because the numeric variables get used
 153   for other things in complicated expansions.
 154
 155 . The default for rfc1413_query_timeout has been changed from 30s to 5s.
 156
 157 . It is possible to use setclassresources() on some BSD OS to control the
 158   resources used in pipe deliveries.
 159
 160 . A new ACL modifier called add_header, which can be used with any verb.
 161
 162 . More errors are detectable in retry rules.
 163
 164 There are a number of other additions too.
 165
 166
 167 Version 4.60
 168 ------------
 169
 170 The documentation is up-to-date for the 4.60 release. Major new features since
 171 the 4.50 release are:
 172
 173 . Support for SQLite.
 174
 175 . Support for IGNOREQUOTA in LMTP.
 176
 177 . Extensions to the "submission mode" features.
 178
 179 . Support for Client SMTP Authorization (CSA).
 180
 181 . Support for ratelimiting hosts and users.
 182
 183 . New expansion items to help with the BATV "prvs" scheme.
 184
 185 . A "match_ip" condition, that matches an IP address against a list.
 186
 187 There are many more minor changes.
 188
 189 ****