Cisco Cisco Email Security Appliance C170 사용자 가이드

SenderBase affiliates send real-time, global data

Sending MTA opens connection with the Cisco IronPort appliance

Cisco IronPort appliance checks global data for the connecting IP address

SenderBase Reputation Service calculates the probability this message is spam and assigns a SenderBase 
Reputations Score

Cisco IronPort returns the response based on the SenderBase Reputation Score

Cisco IronPort Reputation Filter technology aims to shunt as much mail as possible from the remaining 
security services processing that is available on the Cisco IronPort appliance. (See 

.) 

When enabling reputation filtering, mail from known bad senders is simply refused. Known good mail 
from global 2000 companies is automatically routed around the spam filters, reducing the chance of false 
positives. Unknown, or “grey” email is routed to the anti-spam scanning engine. Using this approach, 
reputation filters can reduce the load on the content filters by as much as 50%.

Sending MTA

SBRS Scoring Engine

•Global complaint data

•Global volume data

SenderBase Affiliate Network

1

5

3

4

2

1.2.3.4

HELO

1.2.3.4

Rule hits 

SBRS = 

250-Recipient Accepted

or 

452-Too many recipients this hour

or 

554-Access Denied

for 

1.2.3.4

IronPort appliance