Details

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. This significantly reduces the attack vector for inbound email-borne spam and malware.

As messages are filtered, it is prudent to temporarily host them in an archive for evaluation by administrators or users. The archive can be used to recover messages that might have been inappropriately filtered, preventing data loss, and to provide a base of analysis that can provide future filter refinements.

Solution

Open the Exchange Management Shell and enter the following command:

Set-ContentFilterConfig -QuarantineMailbox <'QuarantineMailbox SmtpAddress'>

Note: The value must be in single quotes.

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-221234r612603_rule
• STIG-ID|EX16-ED-000350
• STIG-Legacy|SV-95259
• STIG-Legacy|V-80549
• Vuln-ID|V-221234

Source

• Tenable.com/audits