[Exim] Receiving by aliases only, how?

I'd like to receive mail by aliases only, rejecting anything to my real
account. How can I set it up with Exim? I found no answer in the FAQ, so
I wonder if I can.

Thanks in advance.

--
Kaz Sasayama <kaz2002@???>; Screen Name: kazssym
Hypercore <http://www.hypercore.co.jp/> for Open-Source software.