Email

For an email address that has your domain name on it you basically have two options: email aliasing or email accounts. Built in with your domain name is a feature called email aliasing.  An alias is kind of like a shortcut on your desktop, it's not the program itself, but it points to it. 

So in the same sense, you could setup an email "You@yourNEWdomain.com" and have all the emails sent to that email address forwarded to "You@yourOLDemail.com."

So the new email address doesn't really exist, but you're clients won't know that. For a more robust solution, you can sign up for separate email hosting.

This is actually very easy to do, and it gives your company one solid place to go for email accounts.  However, this feature does cost a fee, which is dependant on the email plan that you choose.