Cisco Cisco Email Security Appliance C170 Guia Do Utilizador
6-6
User Guide for AsyncOS 9.7 for Cisco Email Security Appliances
Chapter 6 Sender Reputation Filtering
Editing Sender Reputation Filtering Score Thresholds for a Listener
Testing Sender Reputation Filtering Using the SBRS
Unless you regularly receive a large portion of spam, or you have set up “dummy” accounts to
specifically receive spam for your organization, it may be difficult to immediately test the SBRS policies
you have implemented. However, if you add entries for reputation filtering with SenderBase Reputation
Scores into a listener’s HAT as indicated in
specifically receive spam for your organization, it may be difficult to immediately test the SBRS policies
you have implemented. However, if you add entries for reputation filtering with SenderBase Reputation
Scores into a listener’s HAT as indicated in
, you will notice that a smaller percentage of
inbound mail will be “unclassified.”
Test the policies using the
trace
command with an arbitrary SBRS. See
. The
trace
command is available in the CLI as well as the GUI.
Table 6-1
Suggested Mail Flow Policies for Implementing the SBRS
Policy Name
Primary
Behavior
(Access
Rule) Parameters
Behavior
(Access
Rule) Parameters
Value
$BLOCKED
REJECT
None
$THROTTLED
ACCEPT
Maximum messages / session:
Maximum recipients / message:
Maximum message size:
Maximum concurrent connections:
Use Spam Detection:
Use TLS:
Maximum recipients / hour:
Use SenderBase:
10
20
1 MB
10
ON
OFF
20
(recommended)
ON
$ACCEPTED
(Public Listener)
ACCEPT
Maximum messages / session:
Maximum recipients / message:
Maximum message size:
Maximum concurrent connections:
Use Spam Detection:
Use TLS:
Use SenderBase:
1,000
1,000
100 MB
1,000
ON
OFF
ON
$TRUSTED
ACCEPT
Maximum messages / session:
Maximum recipients / message:
Maximum message size:
Maximum concurrent connections:
Use Spam Detection:
Use TLS:
Maximum recipients / hour:
Use SenderBase:
1,000
1,000
100 MB
1,000
OFF
OFF
-1
(disabled)
OFF