Don't want my Comcast mail going to Outlook


Outlook version
Outlook 2010 64 bit
Email Account
I recently installed Outlook 2010 on my laptop for a new job. I use this for all my work emails. However, I somehow checked some box or something so that now all my personal emails from a Comcast email address are coming to my outlook inbox. How can I disable this? I want to keep comcast mail only at I called Comcast and they said this is something I have to change in Outlook. I 'm just not sure where/how to do it. Can someone please guide me? thanks!!