No they don't.

This is the fourth day, I have not had my Comcast e-mail, which just suddenly disappeared. I have made at least seven calls to Comcast, all futile. The company is completed incompetent and doesn't seem to have a clue why I lost my e-mail and how to restore it. It's frightening when you realize that such a clueless company handles so many customers. In the meantime, I am aware that I have dozens of e-mails lost somewhere in the ether and a server that has no idea how to find them for me.