Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

The SenderBase Reputation Score (SBRS) is a numeric value assigned to an IP address based on 
information from the SenderBase Reputation Service. The SenderBase Reputation Service aggregates 
data from over 25 public blacklists and open proxy lists, and combines this data with global data from 
SenderBase to assign a score from -10.0 to +10.0, as follows:

The lower (more negative) the score, the more likely that a message is spam. A score of -10.0 means that 
this message is “guaranteed” to be spam, while a score of 10.0 means that the message is “guaranteed” 
to be legitimate. 

Using the SBRS, you configure the Cisco IronPort appliance to apply mail flow policies to senders based 
on their trustworthiness. (You can also create message filters to specify “thresholds” for SenderBase 
Reputation Scores to further act upon messages processed by the system. For more information, refer to 
“SenderBase Reputation Rule” and “Bypass Anti-Spam System Action” in the “Using Message Filters 
to Enforce Email Policies” chapter in the Cisco IronPort AsyncOS for Email Advanced Configuration 
Guide.)

Most likely to be a source of spam

Neutral, or not enough information to make a recommendation

Most likely to be a trustworthy sender