doc/doc-txt/NewStuff

   1 $Cambridge: exim/doc/doc-txt/NewStuff,v 1.108 2006/07/31 14:19:31 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 but have not yet made it into the main manual (which is most conveniently
   8 updated when there is a relatively large batch of changes). The doc/ChangeLog
   9 file contains a listing of all changes, including bug fixes.
  10
  11 Version 4.63
  12 ------------
  13
  14 1. There is a new Boolean option called filter_prepend_home for the redirect
  15    router. It defaults true, for backward compatibility. If a "save" command in
  16    an Exim filter has a relative path for its argument, and $home is defined,
  17    it is automatically prepended to the relative path. This action can now be
  18    prevented by setting filter_prepend_home false.
  19
  20 2. There is a new acl, set by acl_not_smtp_start, which is run right at the
  21    start of receiving a non-SMTP message, before any of the message has been
  22    read. (This is the analogue of the acl_smtp_predata ACL for SMTP input.) The
  23    result of this ACL is ignored; it cannot be used to reject a message. If
  24    you really need to, you could set a value in an ACL variable here and reject
  25    based on that in the acl_not_smtp ACL. However, this ACL can be used to set
  26    controls, and in particular, it can be used to set control=suppress_local_
  27    fixups, which cannot be used in the acl_not_smtp ACL because by the time
  28    that ACL is run, it is too late. When the acl_not_smtp_start ACL is run, the
  29    sender and recipients are known, so the "senders" and "sender_domains"
  30    conditions and $sender_address and $recipients variables can be used.
  31    Variables such as $authenticated_ sender are also available. It is possible
  32    to specify added header lines in this ACL.
  33
  34 3. When an SMTP error message is specified in a "message" modifier in an ACL,
  35    or in a :fail: or :defer: message in a redirect router, Exim now checks the
  36    start of the message for an SMTP error code. This consists of three digits
  37    followed by a space, optionally followed by an extended code of the form
  38    n.n.n, also followed by a space. If this is the case and the very first
  39    digit is the same as the default error code, the code from the message is
  40    used instead. If the very first digit is incorrect, a panic error is logged,
  41    and the default code is used. This is an incompatible change, but it is not
  42    expected to affect many (if any) configurations. It is possible to suppress
  43    the use of the supplied code in a redirect router by setting the
  44    forbid_smtp_code option true. In this case, any SMTP code is quietly
  45    ignored.
  46
  47 4. There is a new parameter for LDAP lookups called "referrals", which takes
  48    one of the settings "follow" (the default) or "nofollow". The latter stops
  49    the LDAP library from trying to follow referrals issued by the LDAP server.
  50
  51 5. Version 20070721.2 of exipick now included, offering these new options:
  52     --reverse
  53         After all other sorting options have bee processed, reverse order
  54         before displaying messages (-R is synonym).
  55     --random
  56         Randomize order of matching messages before displaying.
  57     --size
  58         Instead of displaying the matching messages, display the sum
  59         of their sizes.
  60     --sort <variable>[,<variable>...]
  61         Before displaying matching messages, sort the messages according to
  62         each messages value for each variable.
  63     --not
  64         Negate the value for every test (returns inverse output from the
  65         same criteria without --not).
  66
  67
  68 Version 4.62
  69 ------------
  70
  71 1. The ${readsocket expansion item now supports Internet domain sockets as well
  72    as Unix domain sockets. If the first argument begins "inet:", it must be of
  73    the form "inet:host:port". The port is mandatory; it may be a number or the
  74    name of a TCP port in /etc/services. The host may be a name, or it may be an
  75    IP address. An ip address may optionally be enclosed in square brackets.
  76    This is best for IPv6 addresses. For example:
  77
  78      ${readsocket{inet:[::1]:1234}{<request data>}...
  79
  80    Only a single host name may be given, but if looking it up yield more than
  81    one IP address, they are each tried in turn until a connection is made. Once
  82    a connection has been made, the behaviour is as for ${readsocket with a Unix
  83    domain socket.
  84
  85 2. If a redirect router sets up file or pipe deliveries for more than one
  86    incoming address, and the relevant transport has batch_max set greater than
  87    one, a batch delivery now occurs.
  88
  89 3. The appendfile transport has a new option called maildirfolder_create_regex.
  90    Its value is a regular expression. For a maildir delivery, this is matched
  91    against the maildir directory; if it matches, Exim ensures that a
  92    maildirfolder file is created alongside the new, cur, and tmp directories.
  93
  94
  95 Version 4.61
  96 ------------
  97
  98 The documentation is up-to-date for the 4.61 release. Major new features since
  99 the 4.60 release are:
 100
 101 . An option called disable_ipv6, to disable the use of IPv6 completely.
 102
 103 . An increase in the number of ACL variables to 20 of each type.
 104
 105 . A change to use $auth1, $auth2, and $auth3 in authenticators instead of $1,
 106   $2, $3, (though those are still set) because the numeric variables get used
 107   for other things in complicated expansions.
 108
 109 . The default for rfc1413_query_timeout has been changed from 30s to 5s.
 110
 111 . It is possible to use setclassresources() on some BSD OS to control the
 112   resources used in pipe deliveries.
 113
 114 . A new ACL modifier called add_header, which can be used with any verb.
 115
 116 . More errors are detectable in retry rules.
 117
 118 There are a number of other additions too.
 119
 120
 121 Version 4.60
 122 ------------
 123
 124 The documentation is up-to-date for the 4.60 release. Major new features since
 125 the 4.50 release are:
 126
 127 . Support for SQLite.
 128
 129 . Support for IGNOREQUOTA in LMTP.
 130
 131 . Extensions to the "submission mode" features.
 132
 133 . Support for Client SMTP Authorization (CSA).
 134
 135 . Support for ratelimiting hosts and users.
 136
 137 . New expansion items to help with the BATV "prvs" scheme.
 138
 139 . A "match_ip" condition, that matches an IP address against a list.
 140
 141 There are many more minor changes.
 142
 143 ****