Log into member area.

Click “Your Active Product/Services”

In the My Active Product/Service area go to the “Quick Shortcuts” section select “Email Account”
NOTE: There is a “quick create email account” right below the quick shortcut section but it limits the email account box size to 256MB

Once your redirected to the email section in the C-Panel click on “Create”

In this section simply enter the first part of the email address and your password hit create and your done.
NOTE: Here you can also change your email size

Video Walk through.
https://www.youtube.com/watch?v=X6o-_HdnxWQ