doc/doc-txt/NewStuff

   1 $Cambridge: exim/doc/doc-txt/NewStuff,v 1.111 2006/09/25 10:14:20 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
  54 Version 4.63
  55 ------------
  56
  57 1. There is a new Boolean option called filter_prepend_home for the redirect
  58    router.
  59
  60 2. There is a new acl, set by acl_not_smtp_start, which is run right at the
  61    start of receiving a non-SMTP message, before any of the message has been
  62    read.
  63
  64 3. When an SMTP error message is specified in a "message" modifier in an ACL,
  65    or in a :fail: or :defer: message in a redirect router, Exim now checks the
  66    start of the message for an SMTP error code.
  67
  68 4. There is a new parameter for LDAP lookups called "referrals", which takes
  69    one of the settings "follow" (the default) or "nofollow".
  70
  71 5. Version 20070721.2 of exipick now included, offering these new options:
  72     --reverse
  73         After all other sorting options have bee processed, reverse order
  74         before displaying messages (-R is synonym).
  75     --random
  76         Randomize order of matching messages before displaying.
  77     --size
  78         Instead of displaying the matching messages, display the sum
  79         of their sizes.
  80     --sort <variable>[,<variable>...]
  81         Before displaying matching messages, sort the messages according to
  82         each messages value for each variable.
  83     --not
  84         Negate the value for every test (returns inverse output from the
  85         same criteria without --not).
  86
  87
  88 Version 4.62
  89 ------------
  90
  91 1. The ${readsocket expansion item now supports Internet domain sockets as well
  92    as Unix domain sockets. If the first argument begins "inet:", it must be of
  93    the form "inet:host:port". The port is mandatory; it may be a number or the
  94    name of a TCP port in /etc/services. The host may be a name, or it may be an
  95    IP address. An ip address may optionally be enclosed in square brackets.
  96    This is best for IPv6 addresses. For example:
  97
  98      ${readsocket{inet:[::1]:1234}{<request data>}...
  99
 100    Only a single host name may be given, but if looking it up yield more than
 101    one IP address, they are each tried in turn until a connection is made. Once
 102    a connection has been made, the behaviour is as for ${readsocket with a Unix
 103    domain socket.
 104
 105 2. If a redirect router sets up file or pipe deliveries for more than one
 106    incoming address, and the relevant transport has batch_max set greater than
 107    one, a batch delivery now occurs.
 108
 109 3. The appendfile transport has a new option called maildirfolder_create_regex.
 110    Its value is a regular expression. For a maildir delivery, this is matched
 111    against the maildir directory; if it matches, Exim ensures that a
 112    maildirfolder file is created alongside the new, cur, and tmp directories.
 113
 114
 115 Version 4.61
 116 ------------
 117
 118 The documentation is up-to-date for the 4.61 release. Major new features since
 119 the 4.60 release are:
 120
 121 . An option called disable_ipv6, to disable the use of IPv6 completely.
 122
 123 . An increase in the number of ACL variables to 20 of each type.
 124
 125 . A change to use $auth1, $auth2, and $auth3 in authenticators instead of $1,
 126   $2, $3, (though those are still set) because the numeric variables get used
 127   for other things in complicated expansions.
 128
 129 . The default for rfc1413_query_timeout has been changed from 30s to 5s.
 130
 131 . It is possible to use setclassresources() on some BSD OS to control the
 132   resources used in pipe deliveries.
 133
 134 . A new ACL modifier called add_header, which can be used with any verb.
 135
 136 . More errors are detectable in retry rules.
 137
 138 There are a number of other additions too.
 139
 140
 141 Version 4.60
 142 ------------
 143
 144 The documentation is up-to-date for the 4.60 release. Major new features since
 145 the 4.50 release are:
 146
 147 . Support for SQLite.
 148
 149 . Support for IGNOREQUOTA in LMTP.
 150
 151 . Extensions to the "submission mode" features.
 152
 153 . Support for Client SMTP Authorization (CSA).
 154
 155 . Support for ratelimiting hosts and users.
 156
 157 . New expansion items to help with the BATV "prvs" scheme.
 158
 159 . A "match_ip" condition, that matches an IP address against a list.
 160
 161 There are many more minor changes.
 162
 163 ****