Forwarding Email to External Addresses in Exchange 2003

I keep forgetting this because I don't do it often enough...

When you have an email address for a domain and all the mail for that address gets forwarded to an external account, you can create a contact for the external recipient that has two E-mail addresses.

The primary address would be the external address and the secondary address would be the internal address. When an E-mail is sent to the internal address Exchange will forward it to the external address.

It used to be that you had to create a user AND a contact, if you wanted this to work, but with Exchange 2003, you don't have to.