MailScan 4 for Avirt is the world's first "Real-Time" eMail Scanner for the Avirt Mail Server. This server is published by Applied Technology Systems Ltd. It acts like a Content-Security and AntiVirus Software for your Corporate Avirt Mail Server. It has the world's first Real-Time eMail Content-Security and AntiVirus that analyzes eMails on a real time basis *before* it is delivered to your clients or servers. Both SMTP and POP3 are supported.