I have an exchange 2003 Server and I am trying to use it to send external emails (it works great for internal emails). We have extrernal email now but we use a POP3 incoming server (mail.mycompany.com from the company that hosts our website) and a smtp ougoing server (smtpdsl.xxxxxx.com from our internet service provider). I want to replace the outgoing server provided by our ISP with our own exchange server. Can someone explain to me what changes do I have to make to the exchange server to accomplish this? I m not very familiar with exchange so I d' appreciate any help you can give me. Thanks.