How DMARC works

DMARC allows organizations to specify what action they want to be taken if a fraudulent email is detected in their name, such as rejecting the email or quarantining it. DMARC also allows organizations to collect data on all emails sent to their domain to help them determine if any of them are fraudulent.

DMARC is another authentication protocol like Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM) employed by businesses for email security. DMARC enables organizations to set up rules concerning recipients’ actions on sent emails. The most basic rule is called the SPF Box Rule. This rule, when enabled, will identify senders of emails that are not associated with the domain name. You can set up other controls to help classify the type of email being sent to help people avoid accidentally sending emails to the wrong address or filtering spam.