[Exim] How to use RBL / postal subscription essential???

Hi,

on a private basis I want to use the RBL or maybe the RBL+ system.
I changed the exim 3.36 config file to do a RBL check as described on the
exim homepage.
Now I saw on the MAPS homepage that you have to register manually by
filling out a form and sending it via fax to them, no matter if you are an
individual or an enterprise customer...
Is this true or did I just miss something?

Thanks a lot for your comments and tips,

Michael