Details

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.

Solution

Open the Exchange Management Shell and enter the following command:

Set-RecipientFilterConfig -Enabled $true

Supportive Information

The following resource is also helpful.

• https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_MS_Exchange_2016_Y21M07_STIG.zip

This security hardening control applies to the following category of controls within NIST 800-53: System and Information Integrity.This control applies to the following type of system Windows.

References

• 800-53|SI-8(2)
• CAT|II
• CCI|CCI-001308
• Rule-ID|SV-221243r612603_rule
• STIG-ID|EX16-ED-000470
• STIG-Legacy|SV-95277
• STIG-Legacy|V-80567
• Vuln-ID|V-221243

Source

• Tenable.com/audits