-# Treat any score as spam. Exim checks the spamscore against its own
-# threshold for denial. Exim also sets the spam headers and should do so for
-# every message, not just ones with a high spamscore.
-required_score -100.0
+# Mark any messages with score > 20 as spam, making exim reject them at the
+# door. Any messages with lower spamscores should be filtered by users
+# themselves.
+required_score 20.0