A collaborative messaging system and method includes, in a communications engine, a plurality of message interrogators to process a message from a sender to a receiver. The plurality of message interrogators includes a message adjudicator configured to compare message information from the sender with message information obtained by the message adjudicator and to modify the message information from the sender to a more restrictive value. The plurality of message interrogators further includes a message validator configured to allow or deny the message based upon the modified message information.