The Exchange Sender Reputation filter must identify the spam block level.
An XCCDF Rule
Description
<VulnDiscussion>By performing filtering at the perimeter, up to 90 percent 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 threshold at which an email will be considered spam.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-259615r942159_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Update the EDSP to reflect the SrlBlockThreshold size.
Open the Exchange Management Shell and enter the following command:
Set-SenderReputationConfig -SrlBlockThreshold 6