steve had it basicly right. Cox is your ISP. soem zombied computer is hittign your ISP with spam. get teh IP address for that system adn run a block on it...even if that computer is owned by someon you want to get mail from their mail will come from a real mail server....then let brasil telecom know that they have a DSL customer at 201-24-123-56.bnut3702 sending spam...that is surely covered in terms of servie...the ywill either nuke the spammer or help the person clean up their machine.