DeadAddress Pro is a complete email filtering solution. It does however have several advantages over many other filtering applications. When an email is sent to an unknown user on a mail server, usually the mail server will return the mail message with an error stating that the mail could not be delivered. DeadAddress Pro takes full advantage of this standard email feature by creating FAKE error messages and returning them along with REAL information about your mail host back to the spammer. In addition all filtered mail can also selectively be deleted and an offline backup created in the message archive for later viewing.