Antivirus & Antispam Gateway

Spamhaus Zen

  • Spamhaus Block List
  • Exploits Block List
  • The Policy Block List

Spam URI Realtime Blocklists (SURBL)

The Apache SpamAssassin Project

Vipul's Razor

Distributed Checksum Clearinghouse

ClamAV

Mailscanner

Sendmail

OpenLDAP