"Where exactly would handle, say, just the email?"

Don't take personal offense, the idea that you need some corporation to handle your E-mail is an ignorance, one that's reinforced by those very corporations' marketing departments.

I've been operating my own E-mail servers for two different domains for pennies per day for years now. It's cheap, it's (relatively) easy, and it's _better_ when you control it yourself. If Gmail were to fail, it would be one of the best things to happen to the world economy.