After installing Listserv Classic 1.d and executing the SMTP listener program, I get the following error : Cannot Bind to Local Host, port 25: error 10048 Any ideas as to what the cause is ? Thanks, Doug Doug Wheeler Server Analyst - Information Resources Georgia-Pacific Corporation Neenah Technical Center email : [log in to unmask] voice : 920.729.8178 fax : 920.729.8164