Yes, assuming that they are former Comcast internet customers, and met certain conditions. See here----------------
But this policy only applies to Comcast customers. Someone who has never been one cannot open a Comcast email account.
Cannot get email or get on the web
You need to clarify----------exactly what happens when you try to get to your email? How are you accessing it? With a browser and the webmail interface? Or a desktop client like Outlook or Thunderbird? On a mobile device with a mail app?