Exchange 2003OS: Windows SBSDomain: computeronic.comusers within the organization can send/recieve emails from each other however everyone is unable to send/recieve from internet (gmail, hotmail, etc.)how do i configure mx record in DNS host?screenshots or stey-by-step instructions will be very helpfulThanks!

First of, do you maintain your own DNS zone for computeronic.com? If so, then define an IP address in DNS mmc and create the MX record there. IP address should be of either an Edge Transport or Hub Transport server, depending on your topology. If not, you need to configure with your ISP.