use spf in spamassassin

Hi,

rather than deny or accept a message based on the spf module of exiscan, 
I'd like to use spamassassin's score system. Has anybody done this and 
knows what to do to make this work?

It seems to me the problem is that SA cannot get any envelope 
information, as the Received and Return-path headers (and any other 
header I add with warn message) are added _after_ the complete data-acl 
is run, so there is no chance giving the neccessary information to SA. 
Is this correct?


Regards,
Jakob