Upgrade email - XFinity

Upgrade email, XFinity-Comcast TV equipment. I recently received an email stating that I may have soon to be outdated equipment and to click the links to upgrade. It says "Update your TV boxes - On us" and that they want to give me X1. I just want to make sure this truly came from Comcast and is not some kind of scam before I start logging in. I can't seem to find anything on your website concerning this the possible out dating of equipment. The email came from the address xfinity@emails.xfinity.com. Thanks!