[PenguinCoder]

$3/mo for unlimited number of inbox/addresses, or $3/mo per inbox/addresses? Note, I'm not talking aliases, I'm talking 'per user, entirely separate inbox/login'

[extra88]

Dreamhost Shared Unlimited has no user limits for $7.95/month (paid annually) and I think that includes one free domain name registration.

https://www.dreamhost.com/hosting/

[krageon]

If you're going to host your own email for privacy reasons, don't get a package at a US provider.

[KozmoNau7]

Up to 10 domains, no stated limit on separate inboxes, with entirely separate inbox/login. The 10GB storage is shared, obviously, with quotas configurable.