Can You Have Multiple DMARC Records?

Can You Have Multiple DMARC Records?

1. The Strict One-Record Rule - Your domain is strictly limited to having only one DMARC record, This is a fundamental requirement of the official DMARC specification, RFC 7489, The system requires a single, unambiguous policy for all email receivers.
2. Why Multiple Records Fail - Mail servers look for one TXT record at `_dmarc.yourdomain.com` specifically, Finding multiple records creates a conflict with no clear resolution rule, Most receivers will ignore all policies, treating your domain as unprotected.
3. Consequences of a Broken Policy - Your `p=reject` or `p=quarantine` policy will become completely ineffective, This failure leaves your domain vulnerable to phishing and spoofing attacks, The entire purpose of implementing DMARC for security is totally defeated.
4. The Correct Implementation Method - Never add a second DMARC record for new services or reports, Instead, modify your single existing record to include the new instructions, Use comma-separated lists within tags like `rua` for multiple destinations.

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Видео Can You Have Multiple DMARC Records? канала Email Desk