Cisco Cisco Email Security Appliance C160 Mode D'Emploi

A moderate approach is to block messages with a SenderBase Reputation Score 
lower than -3.0, throttle between -3.0 and 0, apply the default policy between 0 
and +6.0, and apply the trusted policy for messages with a score greater than +6.0. 
Using this approach ensures a very small false positive rate while achieving better 
system performance (because more mail is shunted away from Anti-Spam 
processing). 

An aggressive approach is to block messages with a SenderBase Reputation Score 
lower than -2.0, throttle between -2.0 and 0.5, apply the default policy between 0 
and +4.0, and apply the trusted policy for messages with a score greater than +4.0. 
Using this approach, you might incur some false positives; however, this approach 
maximizes system performance by shunting the most mail away from Anti-Spam 
processing. 

Users are also recommended to assign all messages with a SenderBase Reputation 
Score greater than 6.0 to the $TRUSTED policy. 

-10 to -4

-4 to -2

-2 to 7

7 to 10

-10 to -3

-3 to -1

-1 to 6

6 to 10

-10 to -2

-2 to -0.5

-0.5 to 4

4 to 10