[exim] spam problems

Hi

Recently one of my servers started to send a lot of spam. I've
installed assp deluxe application on it, but it didn't help me with
outgoing spam messages. I think there is a problem with spam bouncing.
when spammer sends messages to inexistent user on my machine server
just bounce the message with whole header and body. I think that's the
reason my server is on some BLs.

can anybody tell me how to configure exim to stop bounce messages?