MRC:
Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification.FEAT
Special Features:
Looks at email sender ip addresses, number of connections, message volume, recipients, and other attributes across smtp connections to identify behavior patterns consistent with security threats, then takes the appropriate action, first using traffic shaping todeter the attack and blocking the completely if the attack persists; blocks email denial of service and directory harvest attacks; uses intelligent behavior shaping to immediately place invalid email recipients on a black list, thus freeing up server; state-of-the-art network based email defense in a simple to-manage linux-based appliance
