The total number of forwarding destinations on your account is limited by the number of Pobox addresses (at our domains or yours) that you have. Every account can have at least 5 forwarding destinations, but you can have as many forwarding destinations on your account as you have Pobox addresses. For instance, if you had 20 addresses at your domain, you could have 20 forwarding addresses, so each of them could go to a different place.