Notice: This documentation was written for CentOS 5. It may not be accurate for CentOS 6 or subsequent releases. 1. Introduction Amavisd-new is a reliable high-performance interface between an email server (MTA) and content checkers such as virus scanners (ClamAV), and/or SpamAssassin. Amavisd-new supports both (E)SMTP and LMTP protocols as well as UNIX sockets for communicating with the MTA and c