ITA Secure Messaging works just like a network firewall - it intercepts, inspects, and identifies ALL emails arriving into your network before they reach your actual email server. Customizable options allow you to set the rules compatible with your business policies on which emails should be blocked and which emails should be let in. Our comprehensive system of archiving and our single-click restore option guarantees that not a single normal email will be lost. The diagram below explains how ITA Secure Messaging works to block Spam.   When an email comes into your network from the Internet: It is intercepted and processed by ITA Secure Messaging. Emails are evaluated, assigned a score by the Rules Engine and categorized as: Good, Possible Spam and Spam. Depending on the results received from the Rules Engine, ITA Secure Messaging either archives email as spam or forwards it to your mail server for delivery to a user Inbox.