What is DMARC (Domain-based Message Authentication)?
Email authentication protocol that combines SPF and DKIM, providing clear policies for handling authentication failures. Highest level of email authentication protection. Used by organizations to prevent email spoofing and phishing. Major email providers require DMARC for optimal deliverability.
DMARC prevents fraud by checking both SPF and DKIM authentication, providing clear policies for handling failures. It enables domain owners to specify how receiving servers should handle suspicious emails and get detailed reports on authentication results.
DMARC offers three policy options: none (monitor only), quarantine (send suspicious emails to spam), and reject (block unauthorized emails). Organizations typically start with monitoring and gradually increase protection levels.
DMARC reports provide insights into email authentication status, sending sources, and potential threats. Regular analysis helps identify legitimate vs unauthorized senders and refine email security policies.
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