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:
Allows organizations to easily define and enforce custom policies on the content of a message or the identityof the sender or recipient, and take actions to quarantine, return, drop, en-route, annotate, add disclaimers, modify headers, or tag messages; includespolicy templates for hippa and glba policy violation monitoring, including aset of standard reports for complianceanalysis and auditing