Руководство Пользователя для Cisco Cisco Email Security Appliance C170
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Cisco IronPort AsyncOS 7.1 for Email Configuration Guide
OL-22158-02
Chapter 5 Configuring the Gateway to Receive Email
Sender Groups defined by SenderBase Reputation Scores
The IronPort appliance can query the IronPort SenderBase Reputation Service to
determine a sender’s reputation score (SBRS). The SBRS is a numeric value
assigned to an IP address, domain, or organization based on information from the
SenderBase Reputation Service. The scale of the score ranges from -10.0 to
+10.0, as described in
determine a sender’s reputation score (SBRS). The SBRS is a numeric value
assigned to an IP address, domain, or organization based on information from the
SenderBase Reputation Service. The scale of the score ranges from -10.0 to
+10.0, as described in
Using the SBRS, you configure the IronPort appliance to apply mail flow policies
to senders based on their trustworthiness. For example, all senders with a score
less than -7.5 could be rejected. This is most easily accomplished via the GUI; see
to senders based on their trustworthiness. For example, all senders with a score
less than -7.5 could be rejected. This is most easily accomplished via the GUI; see
.
However, if you are modifying an exported HAT in a text file, the syntax for
including SenderBase Reputation Scores is described in
including SenderBase Reputation Scores is described in
. See
“Customizing Listeners” in the Cisco IronPort AsyncOS for Email Advanced
Configuration Guide.
Configuration Guide.
Note
Network owners added to a HAT via the GUI use the syntax
SBO:
n, where n is the
network owner’s unique identification number in the SenderBase Reputation
Service.
Service.
Table 5-9
Definition of the SenderBase Reputation Score
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
none
No data available for this sender (typically a source of spam)
Table 5-10
Syntax for SenderBase Reputation Scores within a HAT
SBRS[
n
:
n
]
SenderBase Reputation Score. Senders are identified by querying the
SenderBase Reputation Service, and the scores are defined between the
ranges.
SenderBase Reputation Service, and the scores are defined between the
ranges.
SBRS[non
e]
e]
Specify no SBRS (very new domains may not have SenderBase
Reputation Scores yet).
Reputation Scores yet).