A system and method are disclosed for classifying a message. The method includes receiving the message, identifying all items of a certain type in the message, determining whether each of the items meets a criterion, and in the event that all the items are determined to meet the criterion, determining a classification of the message. The system includes an interface configured to receive the message, a processor coupled to the interface, configured to identify all items of a certain type in the message; determine whether each of the items meets a criterion; and in the event that all the items are determined to meet the criterion, determine a classification of the message.