1. A method for classifying a message, comprising: receiving a message, the message including a distinguishing property; executing instructions stored in a memory, wherein execution of the instructions by a processor: parses the message body to determine that the distinguishing property includes a contact point that is used to classify the message, p 1 reduces the contact point to an identifier that represents the contact point regardless of individual format of the contact point; generates a signature based on the identifier; and compares the generated signature to one or more previously generated signatures stored in a database of acceptable signatures.