How DMARC supports CMMC compliance & strengthens email security

1. Strengthening email security

Email remains a primary attack point for cybercriminals targeting DoD contractors. Attackers frequently spoof domains and launch phishing attacks to trick users into providing credentials, sending funds, or providing unauthorized access.

By implementing DMARC, SPF, & DKIM, organizations can:

• Prevent email spoofing: Ensure that only authorized senders can use a certain domain.
• Block phishing attempts: Reduce the risk of phishing attacks targeting employees and supply chain partners.
• Enhance email authentication: Align with CMMC requirements for securing communication channels.

2. Meeting CMMC Level 2 & Level 3 requirements

CMMC Level 2 requires organizations to implement email security measures to safeguard CUI. Level 3 goes further by mandating advanced security controls, making DMARC enforcement important in achieving compliance.

How DMARC helps with CMMC compliance:

• Visibility & reporting: DMARC provides real-time visibility into unauthorized email activity.
• Policy enforcement: DMARC policies decide how organizations should handle unauthorized emails (monitoring, quarantining, or rejecting).
• Continuous monitoring: Organizations can monitor their email communication and adjust authentication settings to reduce APTs.

3. Avoiding compliance violations & breaches

Failing to implement email security measures can result in:

• Lost DoD contracts due to non-compliance with CMMC requirements.
• Increased risk of cyberthreats, making organizations more vulnerable.
• Reputational damage from data breaches caused by phishing or email spoofing.

Implementing DMARC, SPF, and DKIM reduces these risks while helping meet CMMC compliance requirements.