Domain mapping, cpanel and emails

Hi, a quick question:

I am setting another multisite network and I am going to be using the domain mapping plugin, but also want to offer clients email addresses @theirdomain

In the domain registrar, I will be editing the A record to point to my wpms install, but I will also be creating and account in WHM for the domain, and add emails using cpanel for that domain. Will that work?

Since all you need is an A record for making the domain point to the correct blog, I guess emails should work fine with how I plan to do it?