US Patent 9473437 Tertiary classification of communications

An electronic communication is received. The received communication is classified according to a tertiary classification scheme. In the tertiary classification scheme, communications classified using a first classification are not delivered to a recipient. Also in the tertiary classification scheme, communications classified using a second classification are subjected to heightened review. In some cases, the heightened review is performed by one or more reviewers, after the communication has been at least partially redacted.