The Exchange Recipient filter must be enabled.

From MS Exchange 2013 Edge Transport Server Security Technical Implementation Guide

Part of SRG-APP-000261

Associated with: CCI-001308

SV-84511r1_rule The Exchange Recipient filter must be enabled.

Vulnerability discussion

Email system availability depends in part on best practice strategies for setting tuning configurations. Careful tuning reduces the risk that system or network congestion will contribute to availability impacts. Filters that govern inbound email evaluation can significantly reduce spam, phishing, and spoofed emails. Messages from blank senders, known spammers, or zero-day attack modifications must be enabled to be effective.

Check content

Open the Exchange Management Shell and enter the following command: Get-RecipientFilterConfig | Select Name, Enabled If the value of Enabled is not set to True, this is a finding.

Fix text

Open the Exchange Management Shell and enter the following command: Set-RecipientFilterConfig -Enabled $true

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