RBL for procmail ?

Hi,

I manage a mail server for a lot of people so it's difficult for me to
let things like rbl, mail-abuse, etc which could reject some mails for
my users which could be important. But I hate SPAM so I'd like to
activate rbl, etc for me and I was wondering if I could do that through
procmail.

Any idea ? (I use postfix, in case you know how to do it with it.)

Fabien Penso