An enforced DMARC policy (p=quarantine or p=reject) stops exact-domain spoofing — email that forges your real domain in the From address. It does not stop look-alike (“cousin”) domains, display-name tricks, or compromised accounts. Pair DMARC enforcement with BIMI and domain monitoring for broader coverage.
The single most damaging phishing technique is forging your exact domain so the message looks genuinely internal or from your brand. Once DMARC is at reject, mailbox providers block those forgeries before they reach the inbox. At p=none, however, DMARC stops nothing — it only reports.
DMARC can’t help with look-alike domains (c0mpany.com), display-name spoofing (a real address with your brand as the name), or mail sent from a genuinely compromised mailbox. Those need look-alike monitoring, user training, BIMI (so a verified logo signals the real you), and account security.
Check your DMARC record now
Open the free DMARC checker →No. Only p=quarantine and p=reject block spoofed mail. p=none is monitoring only.
DMARC can’t — you need look-alike/brand monitoring and user awareness, plus BIMI so recipients learn to expect your verified logo.
