Everyone! We all

Hello Everyone!

We all know wpmudev is running a successful multisite website (edublogs).

My question is do they provide domain email through the multisite network?

I was thinking of providing manage hosting services through my multisite network to make it easier for me to manage my client's website.

Now I'm curious how I can provide my client a domain email through my multisite network?

What does edublogs do regarding this issue?

Any advice would be great!