WHITELIST:
    $TRUSTED (My trusted senders have no anti-spam scanning or rate limiting)

BLACKLIST:
sbrs[-10.0:-3.0]
    $BLOCKED (Spammers are rejected)

SUSPECTLIST:
sbrs[-3.0:-1.0]
    $THROTTLED (Suspicious senders are throttled)

UNKNOWNLIST:
sbrs[-1.0:10.0]
sbrs[none]
    $ACCEPTED (Reviewed but undecided, continue normal acceptance)

ALL
$ACCEPTED (Everyone else)