annotate xml/dnsbl.in @ 184:0e15a805d295 stable-6-0-11

embedded dcc filtering
author carl
date Sun, 07 Oct 2007 09:21:50 -0700
parents e8a822f9cca0
children f0eda59e8afd
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
1 <reference>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
2 <title>@PACKAGE@ Sendmail milter - Version @VERSION@</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
3 <partintro>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
4 <title>Packages</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
5 <para>The various source and binary packages are available at <ulink
114
f4f5fb263072 cleanup list of tlds, add trailing / on http package directory reference
carl
parents: 111
diff changeset
6 url="http://www.five-ten-sg.com/@PACKAGE@/packages/">http://www.five-ten-sg.com/@PACKAGE@/packages/</ulink>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
7 The most recent documentation is available at <ulink
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
8 url="http://www.five-ten-sg.com/@PACKAGE@/">http://www.five-ten-sg.com/@PACKAGE@/</ulink>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
9 </para>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
10
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
11 </partintro>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
12
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
13 <refentry id="@PACKAGE@.1">
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
14 <refentryinfo>
184
0e15a805d295 embedded dcc filtering
carl
parents: 183
diff changeset
15 <date>2007-10-07</date>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
16 </refentryinfo>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
17
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
18 <refmeta>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
19 <refentrytitle>@PACKAGE@</refentrytitle>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
20 <manvolnum>1</manvolnum>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
21 <refmiscinfo>@PACKAGE@ @VERSION@</refmiscinfo>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
22 </refmeta>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
23
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
24 <refnamediv id='name.1'>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
25 <refname>@PACKAGE@</refname>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
26 <refpurpose>a sendmail milter with per-user dnsbl filtering</refpurpose>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
27 </refnamediv>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
28
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
29 <refsynopsisdiv id='synopsis.1'>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
30 <title>Synopsis</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
31 <cmdsynopsis>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
32 <command>@PACKAGE@</command>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
33 <arg><option>-c</option></arg>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
34 <arg><option>-s</option></arg>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
35 <arg><option>-d <replaceable class="parameter">n</replaceable></option></arg>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
36 <arg><option>-e <replaceable class="parameter">from|to</replaceable></option></arg>
179
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
37 <arg><option>-b <replaceable class="parameter">local-domain-socket</replaceable></option></arg>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
38 <arg><option>-r <replaceable class="parameter">local-domain-socket</replaceable></option></arg>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
39 <arg><option>-p <replaceable class="parameter">sendmail-socket</replaceable></option></arg>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
40 <arg><option>-t <replaceable class="parameter">timeout</replaceable></option></arg>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
41 </cmdsynopsis>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
42 </refsynopsisdiv>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
43
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
44 <refsect1 id='options.1'>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
45 <title>Options</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
46 <variablelist>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
47 <varlistentry>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
48 <term>-c</term>
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
49 <listitem><para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
50 Load the configuration file, print a cannonical form
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
51 of the configuration on stdout, and exit.
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
52 </para></listitem>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
53 </varlistentry>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
54 <varlistentry>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
55 <term>-s</term>
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
56 <listitem><para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
57 Stress test the configuration loading code by repeating
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
58 the load/free cycle in an infinite loop.
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
59 </para></listitem>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
60 </varlistentry>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
61 <varlistentry>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
62 <term>-d <replaceable class="parameter">n</replaceable></term>
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
63 <listitem><para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
64 Set the debug level to <replaceable class="parameter">n</replaceable>.
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
65 </para></listitem>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
66 </varlistentry>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
67 <varlistentry>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
68 <term>-e <replaceable class="parameter">from|to</replaceable></term>
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
69 <listitem><para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
70 Print the results of looking up the from and to addresses in the
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
71 current configuration. The | character is used to separate the from and to
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
72 addresses in the argument to the -e switch.
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
73 </para></listitem>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
74 </varlistentry>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
75 <varlistentry>
179
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
76 <term>-b <replaceable class="parameter">local-domain-socket-file-name</replaceable></term>
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
77 <listitem><para>
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
78 Set the local socket used for the connection to the dccifd daemon.
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
79 This is typically /var/dcc/dccifd.
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
80 </para></listitem>
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
81 </varlistentry>
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
82 <varlistentry>
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
83 <term>-r <replaceable class="parameter">local-domain-socket-file-name</replaceable></term>
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
84 <listitem><para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
85 Set the local socket used for the connection to our own dns resolver processes.
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
86 </para></listitem>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
87 </varlistentry>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
88 <varlistentry>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
89 <term>-p <replaceable class="parameter">sendmail-socket</replaceable></term>
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
90 <listitem><para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
91 Set the socket used for the milter connection to sendmail. This is either
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
92 "inet:port@ip-address" or "local:local-domain-socket-file-name".
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
93 </para></listitem>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
94 </varlistentry>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
95 <varlistentry>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
96 <term>-t <replaceable class="parameter">timeout</replaceable></term>
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
97 <listitem><para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
98 Set the timeout in seconds used for communication with sendmail.
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
99 </para></listitem>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
100 </varlistentry>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
101 </variablelist>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
102 </refsect1>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
103
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
104 <refsect1 id='usage.1'>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
105 <title>Usage</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
106 <para><command>@PACKAGE@</command> -c</para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
107 <para><command>@PACKAGE@</command> -s</para>
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
108 <para><command>@PACKAGE@</command> -e 'someone@aol.com|localname@mydomain.tld'</para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
109 <para><command>@PACKAGE@</command> -d 10 -r resolver.sock -p local:dnsbl.sock</para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
110 </refsect1>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
112 <refsect1 id='installation.1'>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
113 <title>Installation</title>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
114 <para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
115 This is now a standard GNU autoconf/automake installation, so the normal
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
116 "./configure; make; su; make install" works. "make chkconfig" will
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
117 setup the init.d runlevel scripts. Alternatively, you can use the
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
118 source or binary RPMs at <ulink
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
119 url="http://www.five-ten-sg.com/@PACKAGE@/packages">http://www.five-ten-sg.com/@PACKAGE@/packages</ulink>.
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
120 </para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
121 <para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
122 Note that this has ONLY been tested on Linux, specifically RedHat Linux.
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
123 In particular, this milter makes no attempt to understand IPv6. Your
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
124 mileage will vary. You will need at a minimum a C++ compiler with a
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
125 minimally thread safe STL implementation. The distribution includes a
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
126 test.cpp program. If it fails this milter won't work. If it passes,
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
127 this milter might work.
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
128 </para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
129 <para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
130 Modify your sendmail.mc by removing all the "FEATURE(dnsbl" lines, add
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
131 the following line in your sendmail.mc and rebuild the .cf file
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
132 </para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
133 <para><screen>INPUT_MAIL_FILTER(`dnsbl', `S=local:/var/run/dnsbl/dnsbl.sock, F=T, T=C:30s;S:5m;R:5m;E:5m')</screen></para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
134 <para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
135 Modify the default <citerefentry>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
136 <refentrytitle>@PACKAGE@.conf</refentrytitle> <manvolnum>5</manvolnum>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
137 </citerefentry> configuration.
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
138 </para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
139 </refsect1>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
140
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
141 <refsect1 id='configuration.1'>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
142 <title>Configuration</title>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
143 <para>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
144 The configuration file is documented in <citerefentry>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
145 <refentrytitle>@PACKAGE@.conf</refentrytitle> <manvolnum>5</manvolnum>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
146 </citerefentry>. Any change to the config file, or any file included
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
147 from that config file, will cause it to be reloaded within three
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
148 minutes.
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
149 </para>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
150 </refsect1>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
151
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
152 <refsect1 id='introduction.1'>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
153 <title>Introduction</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
154 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
155 Consider the case of a mail server that is acting as secondary MX for a
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
156 collection of clients, each of which has a collection of mail domains.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
157 Each client may use their own collection of DNSBLs on their primary mail
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
158 server. We present here a mechanism whereby the backup mail server can
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
159 use the correct set of DNSBLs for each recipient for each message. As a
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
160 side-effect, it gives us the ability to customize the set of DNSBLs on a
183
e8a822f9cca0 embedded dcc filtering
carl
parents: 180
diff changeset
161 per-recipient basis, so that fred@example.com could use LOCAL and the
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
162 SBL, where all other users @example.com use only the SBL.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
163 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
164 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
165 This milter can also verify the envelope from/recipient pairs with the
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
166 primary MX server. This allows the backup mail servers to properly
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
167 reject mail sent to invalid addresses. Otherwise, the backup mail
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
168 servers will accept that mail, and then generate a bounce message when
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
169 the message is forwarded to the primary server (and rejected there with
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
170 no such user). These rejections are the primary cause of such backscatter.
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
171 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
172 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
173 This milter will also decode (uuencode, base64, mime, html entity, url
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
174 encodings) and scan for HTTP and HTTPS URLs and bare hostnames in the
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
175 body of the mail. If any of those host names have A or NS records on
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
176 the SBL (or a single configurable DNSBL), the mail will be rejected
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
177 unless previously whitelisted. This milter also counts the number of
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
178 invalid HTML tags, and can reject mail if that count exceeds your
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
179 specified limit.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
180 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
181 <para>
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 127
diff changeset
182 This milter can also impose hourly rate limits on the number of
f4746d8a12a3 add smtp auth rate limits
carl
parents: 127
diff changeset
183 recipients accepted from SMTP AUTH connections, that would otherwise be
f4746d8a12a3 add smtp auth rate limits
carl
parents: 127
diff changeset
184 allowed to relay thru this mail server with no spam filtering.
f4746d8a12a3 add smtp auth rate limits
carl
parents: 127
diff changeset
185 </para>
f4746d8a12a3 add smtp auth rate limits
carl
parents: 127
diff changeset
186 <para>
162
c4bce911c276 don't add auto whitelist for A to A
carl
parents: 161
diff changeset
187 Consider the case of a message from A to B passing thru this milter. If
c4bce911c276 don't add auto whitelist for A to A
carl
parents: 161
diff changeset
188 that message is not blocked, then we might eventually see a reply
156
a220bfb9211f add auto whitelisting
carl
parents: 153
diff changeset
189 message from B to A. If the filtering context for A includes an
162
c4bce911c276 don't add auto whitelist for A to A
carl
parents: 161
diff changeset
190 autowhite entry, and that context does <emphasis>not</emphasis> cover B
c4bce911c276 don't add auto whitelist for A to A
carl
parents: 161
diff changeset
191 as a recipient, then this milter will add an entry in that file to
c4bce911c276 don't add auto whitelist for A to A
carl
parents: 161
diff changeset
192 whitelist such replies for a configurable time period. Suppose A and B
c4bce911c276 don't add auto whitelist for A to A
carl
parents: 161
diff changeset
193 are in the same domain, or at least use the same filtering context. In
c4bce911c276 don't add auto whitelist for A to A
carl
parents: 161
diff changeset
194 that case we don't want to add a whitelist entry for B, since that would
c4bce911c276 don't add auto whitelist for A to A
carl
parents: 161
diff changeset
195 then allow spammers to send mail from B (forged) to B. Such autowhite
160
b3ed72ee6564 allow manual updates to auto whitelist files
carl
parents: 158
diff changeset
196 files need to be writeable by the dnsbl user, where all the other dnsbl
b3ed72ee6564 allow manual updates to auto whitelist files
carl
parents: 158
diff changeset
197 configuration files only need to be readable by the dnsbl user.
156
a220bfb9211f add auto whitelisting
carl
parents: 153
diff changeset
198 </para>
a220bfb9211f add auto whitelisting
carl
parents: 153
diff changeset
199 <para>
176
4ec928b24bab allow manual whitelisting with stamp 1 to remove a whitelist entry
carl
parents: 175
diff changeset
200 You can manually add such an autowhite entry, by appending a single
4ec928b24bab allow manual whitelisting with stamp 1 to remove a whitelist entry
carl
parents: 175
diff changeset
201 text line to the autowhitelist file, using something like
4ec928b24bab allow manual whitelisting with stamp 1 to remove a whitelist entry
carl
parents: 175
diff changeset
202 <command>echo "$mail 0" >>$autowhitefile</command>.
4ec928b24bab allow manual whitelisting with stamp 1 to remove a whitelist entry
carl
parents: 175
diff changeset
203 You can manually remove such an autowhite entry, by appending a single
4ec928b24bab allow manual whitelisting with stamp 1 to remove a whitelist entry
carl
parents: 175
diff changeset
204 text line to the autowhitelist file, using something like
4ec928b24bab allow manual whitelisting with stamp 1 to remove a whitelist entry
carl
parents: 175
diff changeset
205 <command>echo "$mail 1" >>$autowhitefile</command>.
4ec928b24bab allow manual whitelisting with stamp 1 to remove a whitelist entry
carl
parents: 175
diff changeset
206 </para>
4ec928b24bab allow manual whitelisting with stamp 1 to remove a whitelist entry
carl
parents: 175
diff changeset
207 <para>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
208 The DNSBL milter reads a text configuration file (dnsbl.conf) on
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
209 startup, and whenever the config file (or any of the referenced include
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
210 files) is changed. The entire configuration file is case insensitive.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
211 If the configuration cannot be loaded due to a syntax error, the milter
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
212 will log the error and quit. If the configuration cannot be reloaded
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
213 after being modified, the milter will log the error and send an email to
152
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 149
diff changeset
214 root from dnsbl@$hostname. You probably want to add dnsbl@$hostname
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
215 to your /etc/mail/virtusertable since otherwise sendmail will reject
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
216 that message.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
217 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
218 </refsect1>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
219
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
220 <refsect1 id='dcc.1'>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
221 <title>DCC Issues</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
222 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
223 If you are also using the <ulink
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
224 url="http://www.rhyolite.com/anti-spam/dcc/">DCC</ulink> milter, there
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
225 are a few considerations. You may need to whitelist senders from the
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
226 DCC bulk detector, or from the DNS based lists. Those are two very
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
227 different reasons for whitelisting. The former is done thru the DCC
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
228 whiteclnt config file, the later is done thru the DNSBL milter config
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
229 file.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
230 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
231 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
232 You may want to blacklist some specific senders or sending domains.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
233 This could be done thru either the DCC (on a global basis, or for a
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
234 specific single recipient). We prefer to do such blacklisting via the
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
235 DNSBL milter config, since it can be done for a collection of recipient
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
236 mail domains. The DCC approach has the feature that you can capture the
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
237 entire message in the DCC log files. The DNSBL milter approach has the
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
238 feature that the mail is rejected earlier (at RCPT TO time), and the
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
239 sending machine just gets a generic "550 5.7.1 no such user" message.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
240 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
241 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
242 The DCC whiteclnt file can be included in the DNSBL milter config by the
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
243 dcc_to and dcc_from statements. This will import the (env_to, env_from,
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
244 and substitute mail_host) entries from the DCC config into the DNSBL
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
245 config. This allows using the DCC config as the single point for
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
246 white/blacklisting.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
247 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
248 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
249 Consider the case where you have multiple clients, each with their own
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
250 mail servers, and each running their own DCC milters. Each client is
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
251 using the DCC facilities for envelope from/to white/blacklisting.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
252 Presumably you can use rsync or scp to fetch copies of your clients DCC
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
253 whiteclnt files on a regular basis. Your mail server, acting as a
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
254 backup MX for your clients, can use the DNSBL milter, and include those
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
255 client DCC config files. The envelope from/to white/blacklisting will
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
256 be appropriately tagged and used only for the domains controlled by each
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
257 of those clients.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
258 </para>
179
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
259 <para>
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
260 You can now use (via dccifd) different dcc filtering parameters on a per
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
261 context basis. See the dcc_greylist and dcc_bulk_threshold statements
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
262 in the <citerefentry> <refentrytitle>@PACKAGE@.conf</refentrytitle>
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
263 <manvolnum>5</manvolnum> </citerefentry> configuration. Those
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
264 statements are only active if you supply the <option>-b</option> option
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
265 on the dnsbl command line. If you use the dcc via the standard dcc
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
266 milter (dccm), then connections from clients that use SMTP AUTH are
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
267 still subject to greylisting. If you use the dcc via dccifd and this
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
268 milter, then connections from clients that use SMTP AUTH are never
180
7a722f482bfb embedded dcc filtering
carl
parents: 179
diff changeset
269 subject to greylisting. As part of this per-user greylisting, you need
7a722f482bfb embedded dcc filtering
carl
parents: 179
diff changeset
270 to move the dnsblnogrey file from the config directory to something
7a722f482bfb embedded dcc filtering
carl
parents: 179
diff changeset
271 like /var/dcc/userdirs/local/dnsblnogrey/whiteclnt so the dccifd will
7a722f482bfb embedded dcc filtering
carl
parents: 179
diff changeset
272 properly ignore greylisting for those recipients that don't want it.
179
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
273 </para>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
274 </refsect1>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
275
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
276 <refsect1 id='definitions.1'>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
277 <title>Definitions</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
278 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
279 CONTEXT - a collection of parameters that defines the filtering context
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
280 to be used for a collection of envelope recipient addresses. The
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
281 context includes such things as the list of DNSBLs to be used, and the
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
282 various content filtering parameters.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
283 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
284 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
285 DNSBL - a named DNS based blocking list is defined by a dns suffix (e.g.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
286 sbl-xbl.spamhaus.org) and a message string that is used to generate the
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
287 "550 5.7.1" smtp error return code. The names of these DNSBLs will be
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
288 used to define the DNSBL-LISTs.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
289 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
290 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
291 DNSBL-LIST - a named list of DNSBLs that will be used for specific
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
292 recipients or recipient domains.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
293 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
294 </refsect1>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
295
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
296 <refsect1 id='filtering.1'>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
297 <title>Filtering Procedure</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
298 <para>
152
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 149
diff changeset
299 The SMTP envelope 'from' and 'to' values are used in various checks.
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 149
diff changeset
300 The first check is to see if a reply message (swapping the env_from and
160
b3ed72ee6564 allow manual updates to auto whitelist files
carl
parents: 158
diff changeset
301 env_to values) would be unconditionally blocked (just based on the
b3ed72ee6564 allow manual updates to auto whitelist files
carl
parents: 158
diff changeset
302 envelope from address). That check is similar to the main check
b3ed72ee6564 allow manual updates to auto whitelist files
carl
parents: 158
diff changeset
303 described below, but there is no body content to be scanned, and there
b3ed72ee6564 allow manual updates to auto whitelist files
carl
parents: 158
diff changeset
304 is no client connection ip address to be checked against DNSBLs. If
b3ed72ee6564 allow manual updates to auto whitelist files
carl
parents: 158
diff changeset
305 such a reply message would be blocked, we also block the original
b3ed72ee6564 allow manual updates to auto whitelist files
carl
parents: 158
diff changeset
306 outgoing message. This prevents folks from sending mail to recipients
b3ed72ee6564 allow manual updates to auto whitelist files
carl
parents: 158
diff changeset
307 that are unable to reply.
152
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 149
diff changeset
308 </para>
c7fc218686f5 gpl3, block mail to recipients that cannot reply
carl
parents: 149
diff changeset
309 <para>
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 127
diff changeset
310 If the client has authenticated with sendmail, the rate limits are
f4746d8a12a3 add smtp auth rate limits
carl
parents: 127
diff changeset
311 checked. If the authenticated user has not exceeded the hourly rate
144
31ff00ea6bfb allow parent/child to share a fully qualified env_to address
carl
parents: 140
diff changeset
312 limit, then the mail is accepted, the filtering contexts are not used,
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 127
diff changeset
313 the dns lists are not checked, and the body content is not scanned. If
f4746d8a12a3 add smtp auth rate limits
carl
parents: 127
diff changeset
314 the client has not authenticated with sendmail, we follow these steps
f4746d8a12a3 add smtp auth rate limits
carl
parents: 127
diff changeset
315 for each recipient.
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
316 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
317 <orderedlist>
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
318 <listitem><para>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
319 The envelope to email address is used to find an initial filtering
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
320 context. We first look for a context that specified the full email
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
321 address in the env_to statement. If that is not found, we look for a
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
322 context that specified the entire domain name of the envelope recipient
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
323 in the env_to statement. If that is not found, we look for a context
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
324 that specified the user@ part of the envelope recipient in the env_to
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
325 statement. If that is not found, we use the first top level context
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
326 defined in the config file.
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
327 </para></listitem>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
328 <listitem><para>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
329 The initial filtering context may redirect to a child context based on
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
330 the values in the initial context's env_from statement. We look for [1)
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
331 the full envelope from email address, 2) the domain name part of the
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
332 envelope from address, 3) the user@ part of the envelope from address]
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
333 in that context's env_from statement, with values that point to a child
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
334 context. If such an entry is found, we switch to that child filtering
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
335 context.
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
336 </para></listitem>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
337 <listitem><para>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
338 We lookup [1) the full envelope from email address, 2) the domain name
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
339 part of the envelope from address, 3) the user@ part of the envelope
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
340 from address] in the filtering context env_from statement. That results
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
341 in one of (white, black, unknown, inherit).
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
342 </para></listitem>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
343 <listitem><para>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
344 If the answer is black, mail to this recipient is rejected with "no such
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
345 user", and the dns lists are not checked.
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
346 </para></listitem>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
347 <listitem><para>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
348 If the answer is white, mail to this recipient is accepted and the dns
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
349 lists are not checked.
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
350 </para></listitem>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
351 <listitem><para>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
352 If the answer is unknown, we don't reject yet, but the dns lists will be
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
353 checked, and the content may be scanned.
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
354 </para></listitem>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
355 <listitem><para>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
356 If the answer is inherit, we repeat the envelope from search in the
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
357 parent context.
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
358 </para></listitem>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
359 <listitem><para>
168
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
360 If the mail has not been accepted or rejected yet, the dns lists
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
361 specified in the filtering context are checked and the mail is rejected
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
362 if any list has an A record for the standard dns based lookup scheme
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
363 (reversed octets of the client followed by the dns suffix).
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
364 </para></listitem>
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
365 <listitem><para>
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
366 If the mail has not been accepted or rejected yet, and the filtering
170
bd33eaccfed8 fix pre/post scripts in rpm spec file
carl
parents: 168
diff changeset
367 context (or any ancestor context) specifies a non-empty generic regular
bd33eaccfed8 fix pre/post scripts in rpm spec file
carl
parents: 168
diff changeset
368 expression, then we check the fully qualified client name (obtained via
bd33eaccfed8 fix pre/post scripts in rpm spec file
carl
parents: 168
diff changeset
369 the sendmail macro "_"). The mail is rejected if the client name
bd33eaccfed8 fix pre/post scripts in rpm spec file
carl
parents: 168
diff changeset
370 matches the specified regular expression.
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
371 </para></listitem>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
372 <listitem><para>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
373 If the mail has not been accepted or rejected yet, we look for a
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
374 verification context, which is the closest ancestor of the filtering
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
375 context that both specifies a verification host, and which covers the
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
376 envelope to address. If we find such a verification context, and the
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
377 verification host is not our own hostname, we open an smtp conversation
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
378 with that verification host. The current envelope from and recipient to
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
379 values are passed to that verification host. If we receive a 5xy
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
380 response those commands, we reject the current recipient with "no such
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
381 user".
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
382 </para></listitem>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
383 <listitem><para>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
384 If the mail has not been accepted or rejected yet, and the filtering
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
385 context enables content filtering, and this is the first such recipient
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
386 in this smtp transaction, we set the content filtering parameters from
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
387 this context, and enable content filtering for the body of this message.
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
388 </para></listitem>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
389 </orderedlist>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
390 <para>
160
b3ed72ee6564 allow manual updates to auto whitelist files
carl
parents: 158
diff changeset
391 For each recipient that was accepted, we search for an autowhite entry
b3ed72ee6564 allow manual updates to auto whitelist files
carl
parents: 158
diff changeset
392 starting in the reply filtering context. If an autowhite entry is found,
b3ed72ee6564 allow manual updates to auto whitelist files
carl
parents: 158
diff changeset
393 we add the recipient to that auto whitelist file. This will prevent reply
b3ed72ee6564 allow manual updates to auto whitelist files
carl
parents: 158
diff changeset
394 messages from being blocked by the dnsbl or content filtering.
b3ed72ee6564 allow manual updates to auto whitelist files
carl
parents: 158
diff changeset
395 </para>
b3ed72ee6564 allow manual updates to auto whitelist files
carl
parents: 158
diff changeset
396 <para>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
397 If content filtering is enabled for this body, the mail text is decoded
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
398 (uuencode, base64, mime, html entity, url encodings), and scanned for HTTP
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
399 and HTTPS URLs or bare host names. Hostnames must be either ip address
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
400 literals, or must end in a string defined by the TLD list. The first
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
401 &lt;configurable&gt; host names are checked as follows.
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
402 </para>
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
403 <para>
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
404 The only known list that is suitable for the content filter DNSBL is the
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
405 SBL. If the content filter DNSBL is defined, and any of those host
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
406 names resolve to ip addresses that are on that DNSBL (or have
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
407 nameservers that are on that list), and the host name is not on the
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
408 &lt;configurable&gt; ignore list, the mail is rejected.
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
409 </para>
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
410 <para>
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
411 If the content uribl DNSBL is defined, and any of those host names are
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
412 on that DNSBL, and the host name is not on the &lt;configurable&gt;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
413 ignore list, the mail is rejected.
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
414 </para>
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
415 <para>
167
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 164
diff changeset
416 If any non-whitelisted recipient has a filtering context with a non-zero
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 164
diff changeset
417 spamassassin limit, then the message is passed thru spamassassin (via
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 164
diff changeset
418 spamc), and the message is rejected for those recipients with spamassassin
9b129ed78d7d actually use spamassassin result, allow build without spam assassin, only call it if some recipient needs it.
carl
parents: 164
diff changeset
419 limits less than the resulting spamassassin score.
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
420 </para>
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
421 <para>
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
422 We also scan for excessive bad html tags, and if a &lt;configurable&gt;
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
423 limit is exceeded, the mail is rejected.
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
424 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
425 </refsect1>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
426
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
427 <refsect1 id='access.1'>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
428 <title>Sendmail access vs. DNSBL</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
429 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
430 With the standard sendmail.mc dnsbl FEATURE, the dnsbl checks may be
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
431 suppressed by entries in the /etc/mail/access database. For example,
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
432 suppose you control a /18 of address space, and have allocated some /24s
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
433 to some clients. You have access entries like
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
434 <literallayout class="monospaced"><![CDATA[
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
435 192.168.4 OK
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
436 192.168.17 OK]]></literallayout>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
437 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
438 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
439 to allow those clients to smarthost thru your mail server. Now if one
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
440 of those clients happens get infected with a virus that turns a machine
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
441 into an open proxy, and their 192.168.4.45 lands on the SBL-XBL, you
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
442 will still wind up allowing that infected machine to smarthost thru your
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
443 mail servers.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
444 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
445 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
446 With this DNSBL milter, the sendmail access database cannot override the
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
447 dnsbl checks, so that machine won't be able to send mail to or thru your
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
448 smarthost mail server (unless the virus/proxy can use smtp-auth).
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
449 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
450 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
451 Using the standard sendmail features, you would add access entries to
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
452 allow hosts on your local network to relay thru your mail server. Those
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
453 OK entries in the sendmail access database will override all the dnsbl
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
454 checks. With this DNSBL milter, you will need to have the local users
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
455 authenticate with smtp-auth to get the same effect. You might find
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
456 <ulink
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
457 url="http://www.ists.dartmouth.edu/classroom/sendmail-ssl-how-to.php">
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
458 these directions</ulink> helpful for setting up smtp-auth if you are on
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
459 RH Linux.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
460 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
461 </refsect1>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
462
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
463 <refsect1 id='performance.1'>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
464 <title>Performance Issues</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
465 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
466 Consider a high volume high performance machine running sendmail. Each
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
467 sendmail process can do its own dns resolution. Typically, such dns
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
468 resolver libraries are not thread safe, and so must be protected by some
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
469 sort of mutex in a threaded environment. When we add a milter to
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
470 sendmail, we now have a collection of sendmail processes, and a
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
471 collection of milter threads.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
472 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
473 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
474 We will be doing a lot of dns lookups per mail message, and at least
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
475 some of those will take many tens of seconds. If all this dns work is
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
476 serialized inside the milter, we have an upper limit of about 25K mail
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
477 messages per day. That is clearly not sufficient for many sites.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
478 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
479 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
480 Since we want to do parallel dns resolution across those milter threads,
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
481 we add another collection of dns resolver processes. Each sendmail
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
482 process is talking to a milter thread over a socket, and each milter
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
483 thread is talking to a dns resolver process over another socket.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
484 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
485 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
486 Suppose we are processing 20 messages per second, and each message
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
487 requires 20 seconds of dns work. Then we will have 400 sendmail
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
488 processes, 400 milter threads, and 400 dns resolver processes. Of
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
489 course that steady state is very unlikely to happen.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
490 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
491 </refsect1>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
492
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
493
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
494 <refsect1 id='rejected.1'>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
495 <title>Rejected Ideas</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
496 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
497 The following ideas have been considered and rejected.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
498 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
499 <para>
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
500 Add max_recipients setting to the context configuration. Recipients in
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
501 excess of that limit will be rejected, and all the non-whitelisted
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
502 recipients will be removed. Current spammers *very* rarely send more
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
503 than ten recipients in a single smtp transaction, so this won't stop any
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
504 significant amount of spam.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
505 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
506 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
507 Add poison addresses to the configuration. If any recipient is
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
508 poison, all recipients are rejected even if they would be whitelisted,
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
509 and the data is rejected if sent. I have a collection of spam trap
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
510 addresses that would be suitable for such use. Based on my log files,
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
511 any mail to those spam trap addresses is rejected based on either dnsbl
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
512 lookups or the DCC. So this won't result in blocking any additional
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
513 spam.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
514 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
515 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
516 Add an option to only allow one recipient if the return path is
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
517 empty. Based on my log files, there is no mail that violates this
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
518 check.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
519 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
520 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
521 Reject the mail if the envelope from domain name contains any MX
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
522 records pointing to 127.0.0.0/8. I don't see any significant amount of
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
523 spam sent with such domain names.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
524 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
525 </refsect1>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
526
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
527 <refsect1 id='todo.1'>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
528 <title>TODO</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
529 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
530 The following ideas are under consideration.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
531 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
532 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
533 Add a per-context option to reject mail if the number of digits in
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
534 the reverse dns client name exceeds some threshold.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
535 </para>
115
07e5d4721213 use larger resolver buffer
carl
parents: 114
diff changeset
536 <para>
07e5d4721213 use larger resolver buffer
carl
parents: 114
diff changeset
537 Look for href="hostname/path" strings that are missing the required
07e5d4721213 use larger resolver buffer
carl
parents: 114
diff changeset
538 http:// protocol header. Such references are still clickable in common
07e5d4721213 use larger resolver buffer
carl
parents: 114
diff changeset
539 mail software.
07e5d4721213 use larger resolver buffer
carl
parents: 114
diff changeset
540 </para>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
541 </refsect1>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
542
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
543 <refsect1 id='copyright.1'>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
544 <title>Copyright</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
545 <para>
163
97d7da45fe2a spamassassin changes
carl
parents: 162
diff changeset
546 Copyright (C) 2007 by 510 Software Group &lt;carl@five-ten-sg.com&gt;
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
547 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
548 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
549 This program is free software; you can redistribute it and/or modify it
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
550 under the terms of the GNU General Public License as published by the
160
b3ed72ee6564 allow manual updates to auto whitelist files
carl
parents: 158
diff changeset
551 Free Software Foundation; either version 3, or (at your option) any
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
552 later version.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
553 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
554 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
555 You should have received a copy of the GNU General Public License along
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
556 with this program; see the file COPYING. If not, please write to the
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
557 Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
558 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
559 </refsect1>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
560
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
561 <refsect1 id='version.1'>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
562 <title>CVS Version</title>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
563 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
564 $Id$
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
565 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
566 </refsect1>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
567 </refentry>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
568
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
569
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
570 <refentry id="@PACKAGE@.conf.5">
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
571 <refentryinfo>
184
0e15a805d295 embedded dcc filtering
carl
parents: 183
diff changeset
572 <date>2007-10-07</date>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
573 </refentryinfo>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
574
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
575 <refmeta>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
576 <refentrytitle>@PACKAGE@.conf</refentrytitle>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
577 <manvolnum>5</manvolnum>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
578 <refmiscinfo>@PACKAGE@ @VERSION@</refmiscinfo>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
579 </refmeta>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
580
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
581 <refnamediv id='name.5'>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
582 <refname>@PACKAGE@.conf</refname>
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
583 <refpurpose>configuration file for @PACKAGE@ sendmail milter</refpurpose>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
584 </refnamediv>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
585
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
586 <refsynopsisdiv id='synopsis.5'>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
587 <title>Synopsis</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
588 <cmdsynopsis>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
589 <command>@PACKAGE@.conf</command>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
590 </cmdsynopsis>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
591 </refsynopsisdiv>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
592
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
593 <refsect1 id='description.5'>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
594 <title>Description</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
595 <para>The <command>@PACKAGE@.conf</command> configuration file is
148
9330b8d6a56b add documentation fixes, allow env_from target of inherit
carl
parents: 144
diff changeset
596 specified by this partial bnf description. Comments start with //
9330b8d6a56b add documentation fixes, allow env_from target of inherit
carl
parents: 144
diff changeset
597 or # and extend to the end of the line. To include the contents
9330b8d6a56b add documentation fixes, allow env_from target of inherit
carl
parents: 144
diff changeset
598 of some file verbatim in the dnsbl.conf file, use
9330b8d6a56b add documentation fixes, allow env_from target of inherit
carl
parents: 144
diff changeset
599 <literallayout class="monospaced"><![CDATA[include "<file>";]]></literallayout>
9330b8d6a56b add documentation fixes, allow env_from target of inherit
carl
parents: 144
diff changeset
600 </para>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
601
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
602 <literallayout class="monospaced"><![CDATA[
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
603 CONFIG = {CONTEXT ";"}+
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
604 CONTEXT = "context" NAME "{" {STATEMENT}+ "}"
168
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
605 STATEMENT = (DNSBL | DNSBLLIST | CONTENT | ENV-TO | VERIFY | GENERIC
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
606 | AUTOWHITE | CONTEXT | ENV-FROM | RATE-LIMIT) ";"
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
607
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 122
diff changeset
608 DNSBL = "dnsbl" NAME DNSPREFIX ERROR-MSG1
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
609
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
610 DNSBLLIST = "dnsbl_list" {NAME}+
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
611
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
612 CONTENT = "content" ("on" | "off") "{" {CONTENT-ST}+ "}"
178
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
613 CONTENT-ST = (FILTER | URIBL | IGNORE | TLD | CCTLD | HTML-TAGS |
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
614 HTML-LIMIT | HOST-LIMIT | SPAMASS | REQUIRE | DCCGREY |
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
615 DCCBULK) ";"
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 122
diff changeset
616 FILTER = "filter" DNSPREFIX ERROR-MSG2
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 122
diff changeset
617 URIBL = "uribl" DNSPREFIX ERROR-MSG3
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
618 IGNORE = "ignore" "{" {HOSTNAME [";"]}+ "}"
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
619 TLD = "tld" "{" {TLD [";"]}+ "}"
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
620 CCTLD = "cctld" "{" {TLD [";"]}+ "}"
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
621 HTML-TAGS = "html_tags" "{" {HTMLTAG [";"]}+ "}"
124
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 122
diff changeset
622 ERROR-MSG1 = string containing exactly two %s replacement tokens
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 122
diff changeset
623 both are replaced with the client ip address
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 122
diff changeset
624 ERROR-MSG2 = string containing exactly two %s replacement tokens
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 122
diff changeset
625 the first is replaced with the hostname, and the second
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 122
diff changeset
626 is replaced with the ip address
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 122
diff changeset
627 ERROR-MSG3 = string containing exactly two %s replacement tokens
ea6f9c812faa put hostname in smtp message for uribl style lookups
carl
parents: 122
diff changeset
628 both are replaced with the hostname
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
629
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
630 HTML-LIMIT = "html_limit" ("on" INTEGER ERROR-MSG | "off")
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
631
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
632 HOST-LIMIT = "host_limit" ("on" INTEGER ERROR-MSG | "off" |
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
633 "soft" INTEGER)
178
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
634 SPAMASS = "spamassassin" INTEGER
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
635 REQUIRE = "require_match" ("yes" | "no")
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
636 DCCGREY = "dcc_greylist" ("yes" | "no")
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
637 DCCBULK = "dcc_bulk_threshold" (INTEGER | "many" | "off")
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
638
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
639 ENV-TO = "env_to" "{" {(TO-ADDR | DCC-TO)}+ "}"
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
640 TO-ADDR = ADDRESS [";"]
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
641 DCC-TO = "dcc_to" ("ok" | "many") "{" DCCINCLUDEFILE "}" ";"
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
642
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
643 VERIFY = "verify" HOSTNAME ";"
168
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
644 GENERIC = "generic" REGULAREXPRESSION ERROR-MSG4 ";"
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
645 ERROR-MSG4 = string containing exactly one %s replacement token
6bac960af6b4 add generic reverse dns filtering regex
carl
parents: 167
diff changeset
646 which is replaced with the client name
153
8d7c439bb6fa add auto whitelisting
carl
parents: 152
diff changeset
647 AUTOWHITE = "autowhite" DAYS FILENAME ";"
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
648
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
649 ENV_FROM = "env_from" [DEFAULT] "{" {(FROM-ADDR | DCC-FROM)}+ "}"
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
650 FROM-ADDR = ADDRESS VALUE [";"]
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
651 DCC-FROM = "dcc_from" "{" DCCINCLUDEFILE "}" ";"
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 127
diff changeset
652
140
4028de9b46dd cleanup smtp rate limit code
carl
parents: 136
diff changeset
653 RATE-LIMIT = "rate_limit" [DEFAULTLIMIT] "{" (RATE)+ "}"
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 127
diff changeset
654 RATE = USER LIMIT [";"]
f4746d8a12a3 add smtp auth rate limits
carl
parents: 127
diff changeset
655
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
656 DEFAULT = ("white" | "black" | "unknown" | "inherit" | "")
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
657 ADDRESS = (USER@ | DOMAIN | USER@DOMAIN)
148
9330b8d6a56b add documentation fixes, allow env_from target of inherit
carl
parents: 144
diff changeset
658 VALUE = ("white" | "black" | "unknown" | "inherit" | CHILD-CONTEXT-NAME)]]></literallayout>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
659 </refsect1>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
660
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
661 <refsect1 id='sample.5'>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
662 <title>Sample</title>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
663 <literallayout class="monospaced"><![CDATA[
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
664 context main-default {
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
665 // outbound dnsbl filtering to catch our own customers that end up on the sbl
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
666 dnsbl sbl sbl-xbl.spamhaus.org "Mail from %s rejected - sbl; see http://www.spamhaus.org/query/bl?ip=%s";
174
da0c41b9f672 don't whitelist addresses with embedded spaces
carl
parents: 172
diff changeset
667 dnsbl_list sbl;
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
668
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
669 // outbound content filtering to prevent our own customers from sending spam
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
670 content on {
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
671 filter sbl-xbl.spamhaus.org "Mail containing %s rejected - sbl; see http://www.spamhaus.org/query/bl?ip=%s";
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
672 uribl multi.surbl.org "Mail containing %s rejected - surbl; see http://www.rulesemporium.com/cgi-bin/uribl.cgi?bl0=1&domain0=%s";
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
673 #uribl black.uribl.com "Mail containing %s rejected - uribl; see http://l.uribl.com/?d=%s";
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
674 ignore { include "hosts-ignore.conf"; };
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
675 tld { include "tld.conf"; };
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
676 cctld { include "cctld.conf"; };
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
677 html_tags { include "html-tags.conf"; };
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
678 html_limit on 20 "Mail containing excessive bad html tags rejected";
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
679 html_limit off;
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
680 host_limit on 20 "Mail containing excessive host names rejected";
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
681 host_limit soft 20;
178
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
682 spamassassin 4;
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
683 require_match yes;
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
684 dcc_greylist yes;
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
685 dcc_bulk_threshold 50;
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
686 };
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
687
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
688 // backscatter prevention - don't send bounces for mail that we accepted but could not forward
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
689 // we only send bounces to our own customers
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
690 env_from unknown {
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
691 "<>" black;
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
692 };
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 127
diff changeset
693
144
31ff00ea6bfb allow parent/child to share a fully qualified env_to address
carl
parents: 140
diff changeset
694 // hourly recipient rate limit by smtp auth client id
140
4028de9b46dd cleanup smtp rate limit code
carl
parents: 136
diff changeset
695 rate_limit 30 { // default
171
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
696 #fred 100; // override default limits
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
697 #joe 10; // ""
136
f4746d8a12a3 add smtp auth rate limits
carl
parents: 127
diff changeset
698 };
127
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
699 };
2b1a4701e856 sendmail no longer guarantees <> wrapper on envelopes
carl
parents: 124
diff changeset
700
171
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
701 context main {
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
702 dnsbl localp partial.blackholes.five-ten-sg.com "Mail from %s rejected - local; see http://www.five-ten-sg.com/blackhole.php?%s";
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
703 dnsbl local blackholes.five-ten-sg.com "Mail from %s rejected - local; see http://www.five-ten-sg.com/blackhole.php?%s";
174
da0c41b9f672 don't whitelist addresses with embedded spaces
carl
parents: 172
diff changeset
704 dnsbl sbl zen.spamhaus.org "Mail from %s rejected - sbl; see http://www.spamhaus.org/query/bl?ip=%s";
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
705 dnsbl xbl xbl.spamhaus.org "Mail from %s rejected - xbl; see http://www.spamhaus.org/query/bl?ip=%s";
171
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
706 dnsbl_list local sbl;
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
707
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
708 content on {
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
709 filter sbl-xbl.spamhaus.org "Mail containing %s rejected - sbl; see http://www.spamhaus.org/query/bl?ip=%s";
122
e8971c595845 fix typo in multi.surbl.org name
carl
parents: 119
diff changeset
710 uribl multi.surbl.org "Mail containing %s rejected - surbl; see http://www.rulesemporium.com/cgi-bin/uribl.cgi?bl0=1&domain0=%s";
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
711 #uribl black.uribl.com "Mail containing %s rejected - uribl; see http://l.uribl.com/?d=%s";
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
712 ignore { include "hosts-ignore.conf"; };
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
713 tld { include "tld.conf"; };
119
d9d2f8699621 uribl patch from Jeff Evans <jeffe@tricab.com>
carl
parents: 115
diff changeset
714 cctld { include "cctld.conf"; };
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
715 html_tags { include "html-tags.conf"; };
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
716 html_limit off;
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
717 host_limit soft 20;
178
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
718 spamassassin 5;
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
719 require_match yes;
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
720 dcc_greylist yes;
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
721 dcc_bulk_threshold 20;
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
722 };
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
723
175
e726e1a61ef9 allow manual whitelisting with stamp 1 to remove a whitelist entry
carl
parents: 174
diff changeset
724 generic "(^|[.-])(ppp|h|host)?([0-9]{1,3}[.-](Red-|dynamic[.-])?){4}"
171
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
725 "your mail server %s seems to have a generic name";
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
726
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
727 env_to {
171
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
728 # !! replace this with your domain names
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
729 # child contexts are not allowed to specify recipient addresses outside these domains
179
8b86a894514d embedded dcc filtering
carl
parents: 178
diff changeset
730 # if this is a backup-mx, you need to include here domains for which you relay to the primary mx
174
da0c41b9f672 don't whitelist addresses with embedded spaces
carl
parents: 172
diff changeset
731 include "/etc/mail/local-host-names";
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
732 };
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
733
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
734 context whitelist {
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
735 content off {};
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
736 env_to {
171
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
737 # dcc_to ok { include "/var/dcc/whitecommon"; };
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
738 };
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
739 env_from white {}; # white forces all unmatched from addresses (everyone in this case) to be whitelisted
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
740 # so all mail TO these env_to addresses is accepted
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
741 };
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
742
171
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
743 context abuse {
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
744 dnsbl_list xbl;
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
745 content off {};
174
da0c41b9f672 don't whitelist addresses with embedded spaces
carl
parents: 172
diff changeset
746 generic "^$ " " "; # regex cannot match, to disable generic rdns rejects
171
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
747 env_to {
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
748 abuse@ # no content filtering on abuse reports
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
749 postmaster@ # ""
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
750 };
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
751 env_from unknown {}; # ignore all parent white/black listing
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
752 };
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
753
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
754 context minimal {
171
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
755 dnsbl_list sbl;
178
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
756 content on {
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
757 spamassassin 10;
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
758 dcc_bulk_threshold many;
d6531c702be3 embedded dcc filtering
carl
parents: 176
diff changeset
759 };
171
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
760 generic "^$ " " "; # regex cannot match, to disable generic rdns rejects
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
761 env_to {
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
762 };
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
763 };
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
764
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
765 context blacklist {
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
766 env_to {
171
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
767 # dcc_to many { include "/var/dcc/whitecommon"; };
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
768 };
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
769 env_from black {}; # black forces all unmatched from addresses (everyone in this case) to be blacklisted
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
770 # so all mail TO these env_to addresses is rejected
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
771 };
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
772
171
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
773 env_from unknown {
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
774 abuse@ abuse; # replies to abuse reports use the abuse context
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
775 # dcc_from { include "/var/dcc/whitecommon"; };
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
776 };
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
777
171
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
778 autowhite 90 "autowhite/my-auto-whitelist";
8deb51871b3d fix pre/post scripts in rpm spec file
carl
parents: 170
diff changeset
779 # install should create /etc/dnsbl/autowhite writable by userid dnsbl
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
780 };]]></literallayout>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
781 </refsect1>
94
e107ade3b1c0 fix dos line terminators
carl
parents: 92
diff changeset
782
111
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
783 <refsect1 id='version.5'>
d0dad5610980 move to autoconf/automake/docbook
carl
parents: 108
diff changeset
784 <title>CVS Version</title>
108
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
785 <para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
786 $Id$
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
787 </para>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
788 </refsect1>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
789
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
790 </refentry>
1c7677042b78 move to autoconf/automake/docbook
carl
parents: 104
diff changeset
791 </reference>