Exit spamassassin when reaching a value

[Cherubini Enrico]

Good day,
I would like to remove rbl check from postfix and using them in
spamassassin, this because for some users rbl are too aggressive while
for others they aren't enough. I would like to know if it is possible
to set rbl check as the first check in spamassassin and, if the remote
IP is blacklisted then stop other test and exit, so keeping server
load as low as possible.

Thanks.