Ah cool. It's starts being very competitive very fast if you need more than one mailbox and/or more than one domain. Regular services will ask for something like $5/mo (per domain and per mailbox!) which adds up very quickly.
Wish more services used the "all you can eat" model. Charging for emails sent/received and for storage space is all that's needed. Charging for "mailboxes" or "domains" or "aliases" has always been a scam.