The Exchange Spam Evaluation filter must be enabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-221240	EX16-ED-000410	SV-221240r961161_rule	CCI-001308	medium
Description
By performing filtering at the perimeter, up to 90 percent of spam, malware, and other undesirable messages may be eliminated from the transport message stream, preventing their entry into the Exchange environment. This significantly reduces the attack vector for inbound email-borne spam and malware. Spam Evaluation filters scan inbound email messages for evidence of spam and other attacks that primarily use "social engineering" techniques. Upon evaluation completion, a rating is assigned to each message estimating the likelihood of its being spam. Upon arrival at the destination mailbox, the junk mail filter threshold (also configurable) determines whether the message will be withheld from delivery, delivered to the junk mail folder, or delivered to the user’s inbox.
STIG			Date
Microsoft Exchange 2016 Edge Transport Server Security Technical Implementation Guide			2024-12-06

Related Frameworks

1 mapping across 3 frameworks

SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

END-08.2Automatic Spam and Phishing Protection Updates

1.00

DISA STIG Benchmark (XCCDF)V2R6intersects(normalised)
DISA CCI List2025-01-23equal to(normalised)
SCF Secure Traceability Relationship Mapping (STRM)2026.2equal to

NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

SI-8(2)Automatic Updates

1.00

DISA STIG Benchmark (XCCDF)V2R6intersects(normalised)
DISA CCI List2025-01-23equal to(normalised)

CCI1 mapping

CCI-001308

1.00

DISA STIG Benchmark (XCCDF)V2R6intersects(normalised)

Details

Check Text (C-221240r961161_chk)

Note: If third-party anti-spam product is being used, the anti-spam product must be configured to meet the requirement. Open the Exchange Management Shell and enter the following command: Get-ContentFilterConfig | Select Name, Identity, Enabled If the value of "Enabled" is not set to "True", this is a finding.

Fix Text (F-22944r411847_fix)

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