discard high scoring spam?

[Mark Chaney]

I sure I hope I didnt fail to bad on searching for this answer, but when 
simply using spamassasin with postfix as an incoming smtp relay server 
and not using anything like amavis or mailscanner, is there still a way 
to discard high scoring spam (lets say 25), yet still marking emails 
with scores of 5 or more as spam? I know how this would work with amavis 
or mailscanner, but not sure how to do it standalone with postfix/SA. I 
am hoping to avoid having to create filters at the destination servers 
and having them deleted there. Seems like needless traffic/resource 
usage. Thoughts?

Thanks,
Mark