Who: Businesses handling cardholder data, service providers, and any entity connected to payment systems.
What: PCI DSS 4.0 requires all organizations processing payments to implement DMARC by March 31, 2025, to combat email fraud, domain spoofing, and phishing. Non-compliance could lead to fines between $5,000 and $100,000.
DMARC (Domain-based Message Authentication, Reporting, and Conformance) is an email authentication protocol that helps prevent email fraud, phishing, and domain spoofing. It works by allowing domain owners to specify how unauthenticated emails should be handled—whether they should be delivered, quarantined, or rejected.
How DMARC Works:
Authentication – DMARC builds on SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail) to verify that emails are sent from legitimate sources.
Policy Enforcement – Organizations can set policies to reject or quarantine emails that fail authentication, reducing the risk of phishing attacks.
Reporting & Visibility – DMARC generates reports that provide insights into who is sending emails on behalf of a domain and identifies potential abuse.
Why It Matters:
Prevents Brand Impersonation – Stops cybercriminals from using your domain to send fake emails.
Reduces Phishing Attacks – Protects customers and employees from email-based threats.
Improves Email Deliverability – Ensures legitimate emails reach inboxes instead of being marked as spam.
Enhances Compliance – Meets security requirements like PCI DSS 4.0 and aligns with email security best practices.
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