CMMC 1.0 Practice SI.3.219 Requirement:

Implement email forgery protections.

CMMC 1.0 SI.3.219 Requirement Explanation:

Sender Policy Framework (SPF) specifices which servers are allowed to send email from your domain ( Domain Keys Identified Mail (DKIM) verifies the authenticity of an email message to a recipient. Domain-based Message Authentication, Reporting, and Conformance (DMARC) combines SPF and DKIM by specifying policies.

Example CMMC 1.0 SI.3.219 Implementation:

Implement SPF, DMARC, and DKIM on your email domain (e.g.

CMMC 1.0 SI.3.219 Scenario(s):

- Scenario 1:

Your company uses Office 365 Exchange for its email services. You visit Microsoft's website and follow the guidance for enabling SPF, DKIM, and DMARC.

Discover Our NIST SP 800-171 & CMMC 2.0 Solutions:


Compliance Accelerator

Power through compliance. Meet and maintain your NIST SP 800-171 & CMMC 2.0 compliance requirements.

Quantum Assessor

Transform your business. Create new revenue streams and provide scalability for your NIST SP 800-171 and CMMC 2.0 services.

Supply Chain Verifier

Trust is everything. Verify, monitor, and support subcontactor compliance.