TOD:
Comcast changed something earlier this year....and my computer could no longer use Windows Mail.  WM is a PopMail service so that all of my email at my main Comcast.net address was sent to it.  Comcast Mail has a terrible configuration, so I wasn't going to use that as my main email, and I hated to change to a Gmail or Yahoo account....
NOTHING and NOBODY would or could help me at Comcast.  It was a nightmare.  I used the Comcast email for awhile.....and then finally found Mozilla Thunderbird which was a PopMail service that was compatible with Comcast.net.
It was ghastly I tell you.  I was just ghastly.