What is DMARC’s role in phishing prevention?

DMARC prevents domain-based phishing by blocking spoofed messages. When attackers try to send as your domain without authorization, DMARC enforcement (quarantine or reject) stops those messages from reaching recipients.

DMARC addresses specific phishing types: domain spoofing where attackers use your exact domain. It doesn't prevent: display name spoofing (fake name, different domain), lookalike domains (attacker-owned similar domains), or compromised legitimate accounts.

Despite limitations, DMARC significantly reduces phishing success. Enforced DMARC makes impersonating protected brands much harder, forcing attackers toward techniques that are easier for users to detect.