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Project Summary

SORBL is antispam tool to auto-learn own dnsbl zone. Written on Perl.

Currently using: sendmail (I have no other MTA's logs now;)), rbldnsd, host (bind-tools). Also required any (bayesian) filter (I use spamassassin) in milter mode.

SORBL look for sendmail (sm-mta) messages about relay and about adding "X-Spam-Status: Yes" header, analyse IP/hostname/rDNS info, based on plugins and keep blocked ip list in file for rbldnsd daemon.

Basic plugins:
nordns - filter senders without rDNS;
iphost - ip-based names like: 99.88.77.66.in-addr.arpa. IN PTR 99-88-77-66.dsl.cool-isp.com.

Unlike standard "no-rDNS hack", for example, this way more liberal - IP will blocked only after first spam message. Also may be used spamassassin dnsbl feature - to help bayes auto-learning.

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Code Locations:
http://sorbl.googlecode.com/svn/...
Licenses:
GPL-2.0+
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