I've been happy with http://atmailcloud.com/ It's $10/month for 5 email accounts, multi-domain support, with calendaring and contacts too.
Email aliases don't count against the 5 account limit, and you can have as many as you like on whatever domains you like. Adding a domain doesn't use up an account slot, so you can set up forwarding addresses for multiple domains for no extra cost.
Email aliases don't count against the 5 account limit, and you can have as many as you like on whatever domains you like. Adding a domain doesn't use up an account slot, so you can set up forwarding addresses for multiple domains for no extra cost.