Retain Comcast Email IDs when having to drop Xfinity Cable due to move

How do I go about keeping my comcast email IDs since I have to move to a new location and that building does not offer Xfinity as a cable service? As we all know, everything is email-based and I just don't wnat to change the literally few hundred sites where I'm regisgtered with my long-standing comcast.net email address. Thank you.