Руководство Пользователя для Cisco Cisco Email Security Appliance C670
Chapter 7 Reputation Filtering
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Cisco IronPort AsyncOS 7.5 for Email Configuration Guide
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spam. This allows you to set your own threshold for where you choose to block
spam and automatically assign senders to different groups based on their
SenderBase Reputation Score.
spam and automatically assign senders to different groups based on their
SenderBase Reputation Score.
SenderBase Reputation Score (SBRS)
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:
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.
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.)
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.)
Score
Meaning
-10.0
Most likely to be a source of spam
0
Neutral, or not enough information to make a recommendation
+10.0
Most likely to be a trustworthy sender