[Mimedefang] is there a "threshold" with spamassassin

[Keith Dowell]

sometimes i get mail through that has scored higher that the required hits
from spamassassin but the file doesnt get modified - this only seems to
happen when the score is only about 1 higher than required - would this be a
setting from spamassassin or is there some sort of threshold variable in
mimedafang that can be adjusted to say "look if it met the required hits
then dump the dang thing"