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Sender reputation must be enabled.


Overview

Finding ID Version Rule ID IA Controls Severity
Exch-ED-233 Exch-ED-233 Exch-ED-233_rule Medium
Description
By performing filtering at the perimeter, up to 90% of SPAM, malware, and other undesirable messages are eliminated from the message stream rather than admitting them into the Mail server environment. Sender reputation is anti-spam functionality that blocks messages according to many characteristics of the sender. Sender reputation relies on persisted data about the sender to determine what action, if any, to take on an inbound message. This setting enables the sender reputation function.
STIG Date
Microsoft Exchange 2010 Edge Transport Server Role 2012-05-31

Details

Check Text ( C-_chk )
Open the Exchange Management Shell and enter the following command.

Get-SenderReputationConfig | Select SenderBlockingEnabled

If the value of "SenderBlockingEnabled" is not set to "True", this is a finding.

Fix Text (F-_fix)
Open the Exchange Management Shell and enter the following command.

Set-SenderReputationConfig -SenderBlockingEnabled $true