Is there any way to refuse to send mail outside of the server? Basically I want to keep my mail server turned on so I can receive mail, but I don't want to be able to send mail out from the server. How can I go about doing this? Time Warner finally sent me a notice in the mail that any more spam sent from my account will result in termination of my account so... yeh. I need to keep the server running, but not send any mail outbound.