Now that we've moved our website over to Nationbuilder, I'm ready to transition our email accounts.  Previously, you had set up the MX records to point to our existing email provider, but now we would like to set up email on Nationbuilder.  I'd like to set up custom email entries for about a dozen of our members, and also set up alias email names for some anonymous accounts.  ex. [email protected]  volunteer@  marketing@   etc.

What do I need to do?  (keep in mind we're using these email accounts currently so need to minimize disruption)