E-Mail filter client

We are in need of a client that can intercept all incoming e-mail to our domain and check its contents against a database done in Access 2000. It should filter spam thats listed within the database. ## Deliverables Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. Complete copyrights to all work purchased. ## Deadline information Must filter all incoming mail to our server and remove all spam e-mail before releasing the incoming mail to the server.