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Domain-based Authentication Reporting and Conformance (DMARC)

What is DMARC?

Domain-based Authentication Reporting and Conformance (DMARC) builds onto the existing email authentication setup of SPF and DKIM. DMARC adds reporting to the existing email environment. Adding DMARC to the system performs two functions:

  • Tell the recipient server what to do with an incoming email: Reject, quarantine, or allow delivery.
  • Send a status report on emails sent through a domain to an email ID published in the DMARC record.

DMARC is a TXT record published in the DNS manager after SPF and DKIM records have been published. SPF, DKIM, and DMARC are seen as a robust setup to eliminate phishing, spoofing, spam, and other cybercrimes.

How DMARC helps with email delivery?

Implementing DMARC email authentication protocol gives information on how many emails are sent from a domain, who sent these emails, and reasons for email delivery failure.

This allows you to see how many emails were delivered, rejected, and quarantined by the receiving server. This report also highlights the problems associated with SPF and DKIM authentication.

With a substantial amount of information in hand, it becomes easier to act quickly and ensure a good email deliverability rate.