1NAME
2    Mail::SpamAssassin::Plugin::iXhash2 ‐ compute fuzzy checksums
3from mail
4    bodies and compare to known spam ones via DNS
5
6SYNOPSIS
7    loadplugin Mail::SpamAssassin::Plugin::iXhash2 iXhash2.pm
8
9     # The actual rule(s)
10     ixhashdnsbl   IXHASH_IX  ix.dnsbl.manitu.net.
11     body          IXHASH_IX  eval:check_ixhash(’IXHASH_IX’)
12     describe      IXHASH_IX  http://www.ixhash.net/listinfo.html
13     tflags        IXHASH_IX  net
14     score         IXHASH_IX  1.5
15
16     ixhashdnsbl   IXHASH_GENERIC  generic.ixhash.net.
17     body              IXHASH_GENERIC      eval:check_ixhash(’IX‐
18HASH_GENERIC’)
19     describe       IXHASH_GENERIC  http://www.ixhash.net/listin‐
20fo.html
21     tflags        IXHASH_GENERIC  net
22     score         IXHASH_GENERIC  1.5
23
24     ixhashdnsbl   IXHASH_SEM  ixhash.spameatingmonkey.net.
25     body          IXHASH_SEM  eval:check_ixhash(’IXHASH_SEM’)
26     describe            IXHASH_SEM         http://spameatingmon‐
27key.com/lists.html
28     tflags        IXHASH_SEM  net
29     score         IXHASH_SEM  1.5
30
31DESCRIPTION
32    iXhash2.pm  is  a  plugin  for  SpamAssassin 3.2.0 and up. It
33takes the body
34    of a mail, strips parts from it and then computes a hash val‐
35ue from the
36    rest.  These  values will then be looked up via DNS to see if
37the hashes
38    have already been categorized as spam by others.
39
40    This plugin is based on parts of the  procmail‐based  project
41’NiX Spam’,
42    developed by Bert Ungerer.(un@ix.de) For more information see
43    http://www.heise.de/ix/nixspam/.  The procmail code producing
44the hashes
45    only can be found here:
46    ftp://ftp.ix.de/pub/ix/ix_listings/2004/05/checksums
47
48    iXhash2 is an unofficial  version  based  on  iXhash  version
491.5.5
50    (http://www.ixhash.net), adding async DNS lookups for perfor‐
51mance and
52    removing unneeded features. It’s fully  compatible  with  the
53existing
54    implementation.
55
56    To see which DNS zones are currently available see:
57    http://www.ixhash.net
58
59LICENSE
60    Licensed to the Apache Software Foundation (ASF) under one or
61more
62    contributor license agreements. See the NOTICE file  distrib‐
63uted with
64    this work for additional information regarding copyright own‐
65ership. The
66    ASF licenses this file to you under the Apache License,  Ver‐
67sion 2.0 (the
68    "License");  you  may  not use this file except in compliance
69with the
70    License. You may obtain a copy of the License at:
71
72        http://www.apache.org/licenses/LICENSE‐2.0
73
74    Unless required by applicable law or agreed  to  in  writing,
75software
76    distributed  under  the  License is distributed on an "AS IS"
77BASIS,
78    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either  express
79or implied.
80    See  the  License for the specific language governing permis‐
81sions and
82    limitations under the License.
83
84AUTHOR
85    Henrik Krohns <sa@hege.li>
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