Confirm that is in the Incoming Server field. Check the Show Password box if you want to see your password. Apple has actually made it quite simple to automatically detect the correct settings, so this should be very quick. In the Password field, enter your password. This step by step guide will take you through configuring the Mail.app on your Mac (running either Yosemite or the latest version of OS X, El Capitan) to use with your email address. Confirm the Username field has your email address.
From the Tools menu, select Account Settings Enter your full email address in the Email field, and click Continue.
The following are the directions for setting up Comcast email in Outlook 2007 :