SMTP Sender Filter must be enabled.

From Exchange 2010 Edge Transport Server STIG

Part of Exch-2-336

SV-43977r1_rule SMTP Sender Filter must be enabled.

Vulnerability discussion

Email system availability depends in part on best practices 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 0-day attack modifications must be enabled to be effective. Failure to enable the filter will result in no action taken. This setting should always be enabled.

Check content

Open the Exchange Management Shell and enter the following command: Get-SenderFilterConfig | Select 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-SenderfilterConfig -Enabled $true

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