THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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The \[http://spamassassin.apache.org/full/3.0.x/dist/doc/Mail_SpamAssassin_Plugin_RelayCountry.html RelayCountry\] plugin exposes the countries that a mail was relayed from -- turn it on by reading that documentation page, installing the required CPAN module required {{{cpan IP::Country::Fast}}, and uncommenting the 'loadplugin' line in the {{/etc/mail/spamassassin/init.pre}} file for {{Mail::SpamAssassin::Plugin::RelayCountry}}. |
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header RELAYCOUNTRY_CN X-Relay-Countries =~ /CN/ describe RELAYCOUNTRY_CN Relayed through China score RELAYCOUNTRY_CN 3.0 header RELAYCOUNTRY_RU X-Relay-Countries =~ /RU/ describe RELAYCOUNTRY_RU Relayed through Russian Federation score RELAYCOUNTRY_RU 2.0 |
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You can get a list of IANA country codes from \[http://www.iana.org/cctld/cctld-whois.htm\]. You can get a list of countries that statistically relay most of the spam by looking at the source file for {{lib/Mail/SpamAssassin/EvalTests.pm}} and reading the comments surrounding {{$CCTLDS_WITH_LOTS_OF_OPEN_RELAYS}}. |
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Also for 3.1.0, you can apply a patch \[http://bugzilla.spamassassin.org/show_bug.cgi?id=3815\] which will allow you to add a separate MIME header that shows all the message's relay countries, independent of the rules. |
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