ScanMail provides Email Reputation features as a part of spam prevention. As the first line of defense, Trend Micro Email Reputation helps stop spam before it can flood your network and burden your system resources.

When your email server accepts an initial connection from another email server, your email server records the IP address of the computer requesting the connection. Your email server then queries its DNS server, which in turn queries the Reputation database(s) to determine if there is a record for the IP address of the requesting computer. If the host is listed in a database, Email Reputation recommends an appropriate action. You can also customize actions.