What kind of an account do I need?

What kind of an account do I need?

I've got my own domain name and need email forwarding services.  I don't need any mailboxes, just be able to receive mail at my addresses and forward them to mailboxes elsewhere.

I see there is business "Mail Lite' for $1 per user/month.  What's a user?  Is that an email address or is it a user account from which I can manage all my email addresses?

For example if I have user1@mydomain.com and user2, user3, user4, etc...lets say up to user100  (where most "users" are actually aliases that get forwarded to the same place)...would I need to pay $1/month for each of these "users"...in other words, $100/month?  Or would I just have to pay $1/month for one account from which I can manage all of these usernames for my domain?  That really wasn't clear to me.

Or maybe this could be done with one of the personal accounts?

Thanks!