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DMARC (Domain-based Message Authentication, Reporting & Conformance)
Domain-based Message Authentication, Reporting & Conformance (DMARC) is a DNS protocol that uses both Sender Policy Framework, (SPF) and DomainKey Identified Mail (DKIM) to determine the authenticity of incoming and outgoing email messages coming from a domain. This protocol makes it easier for Internet Service Providers (ISPs) and receiving email servers to determine the authenticity of an email message, ensuring that spam, spoofed, or illegitimate mail is not making it through to your inbox.
How Does DMARC Work?
In simple terms, DMARC acts as an extension to the two existing email authentication protocols, SPF and DKIM, allowing for the administrator of a domain to publish a public policy in their DNS records to specify which protocols are implemented and used when outgoing mail is received by an outside email server. A DMARC record will also indicate how rejected and malicious mail should be handled, as in either bouncing it back to the recipient or redirected to another inbox for quarantine.
Why Should I Implement DMARC?
Implementing DMARC, SPF, and DKIM settings within your domain will drastically improve the deliverability rates of your outgoing mail, proving that your domain is authentic and that you are not sending spam or spoofed emails.
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