[exim] URI Blacklists in Exim

Spamassassin has the ability to look up links withing messages to see if
domains are blacklisted. And it works very well. But - in order to
reduce system load I'm trying to do as many tests as possible before I
get to SA.

So - I was wondering if anythone as any code that will do the kind of
URI lookups that SA has in an ACL?