The server is behind a Comcast business modem/router.
I am thinking that what I have to do is change the way the server receives email by disabling the pop connection, and pointing the mx records to the Comcast assigned IP address.
I am not sure what all I would have to reconfigure though. Is there a guide someone can point me to, or explain the steps I should take, or suggest a better way to do what I way to accomplish?
Web email access is enabled (though it only works locally), so I was also thinking I could connect the other LAN port on the server to the Comcast router and assign the server a static public IP so they could access the web email, though this would no be ideal since it would be a hassle to access on a computer or phone.