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Anti-Spam SMTP Proxy
open-in-new
<h2 id="features">Features</h2> <p>Some ASSP's features are: </p> <ul><li>Hidden Markov Model spam filtering</li> <li><a href="/facts/Bayesian_spam_filtering/ytWrkz4a">Bayesian spam filtering</a></li> <li>whitelisting</li> <li>Penalty Box (PB) trapping</li> <li><a href="/facts/DNSBL/XnKVleKE">DNSBL</a>/RBL (Realtime Blackhole Listing)</li> <li>URIBL (<a href="/facts/Uniform_Resource_Identifier/UjyqxTpA">Uniform Resource Identifier</a> Black Listing)</li> <li>Multi-level <a href="/facts/Sender_Policy_Framework/H7qCzXE2">SPF</a> (Sender Policy Framework) validation and blocking</li> <li>DKIM signing and validation</li> <li>DMARC validation and reporting</li> <li><a href="/facts/Sender_Rewriting_Scheme/IYA9zQTR">SRS</a> (Sender Rewriting Scheme) fix-up</li> <li>Session Delaying/<a href="/facts/Greylisting_(email)/7CCQHYRF">Greylisting</a> and connection response delaying</li> <li>Sender validation and recipient validation</li> <li>Multi-level attachment blocking (based on block lists or allow lists or content based executable blocking)</li> <li>As well as multiple <a href="/facts/Request_for_Comments/esftTvE7">RFC</a> validation mechanisms.</li> <li><a href="/facts/Thread_(computer_science)/hh8WHyPd">Multi-threaded</a> (Since version 2.x)</li> <li>Platform independent (Written in <a href="/facts/Perl/fx31kjlT">Perl</a>)</li></ul> <h2 id="see-also">See also</h2> <ul> <li>Free and open-source software portal</li></ul> <ul><li><a href="/facts/Transparent_SMTP_proxy/yS17HXYg">Transparent SMTP proxy</a></li> <li><a href="/facts/SpamAssassin/JdNmRae2">SpamAssassin</a>, popular open source spam filtering that uses razor and other techniques to detect spam.</li> <li><a href="/facts/Qpsmtpd/eANCW4Q6">Qpsmtpd</a>, a similar project</li></ul> <h2 id="external-links">External links</h2> <ul><li><a href="http://www.thockar.com/assp-home">ASSP official homepage</a></li> <li><a href="http://assp.sourceforge.net/">ASSP sourceforge project page</a></li> <li><a href="http://assp.sourceforge.net/forum/">Forum</a></li> <li><a href="http://sourceforge.net/p/assp/wiki/Main_Page/">ASSP Wiki</a></li> <li><a href="http://assp.cvs.sourceforge.net/viewvc/assp/assp2/">ASSP beta development site</a></li> <li><a href="http://www.grscripts.com/">ASSP Deluxe for cPanel/WHM frontend for ASSP</a></li></ul>