Spamassassin - check return-path against from address
I am getting a lot of spam recently that I am having a hard time getting flagged by spamassassin. We have enabled SPF checking and it works but I think these emails are getting through because the return-path is not from my domain.
Is there a way to get spamassassin to flag an email if the return-path and from field do not match?
Received: from 126.96.36.199 by smtp.secureserver.net; Fri, 19 Feb 2010
Subject: Very urgent