How to run a mail server

[salchipapi]

Hi, I have a website that I'm running successful on
Apache web server, and since I'm already running
a web server I figured that I might as well run a
email server, my question is what exactly do I
need and have to do? so I can have a email
address like webmaster@mydomain.com
I've tried using Mailenable and configured it
with Outlook Express but when I test it out
I couldn't send or recieve email I could only
send and receive to my own address at my
webmaster@mydomain.com with any other
email addresses it won't work, can someone
please help me to configure it properly, Thanks

[glc]

Your ISP is probably blocking the ports to prevent you from running a mail server on a residential account. You need to review your terms of service.