The Importance of DMARC for Email Security 1

Understanding What DMARC Is

DMARC stands for Domain-based Message Authentication, Reporting and Conformance. It is a security protocol that is used to protect email systems from phishing and spoofing attacks. DMARC builds on the existing email authentication protocol, DomainKeys Identified Mail (DKIM), and Sender Policy Framework (SPF), and adds a layer of reporting and conformance that allows domain owners to specify how messages that fail authentication should be handled.

Why DMARC is Important

Phishing and spoofing attacks are on the rise, and they can cause significant damage to a business’s reputation and finances. The FBI’s Internet Crime Complaint Center (IC3) reported that business email compromise (BEC) scams, which often involve phishing or spoofing attacks, resulted in more than $1.7 billion in losses in 2019 alone. DMARC provides a way to prevent these attacks by allowing email receivers to verify that incoming messages are from an authorized sender and to block messages that fail authentication.

How DMARC Works

When a DMARC policy is in place, it tells email receivers what to do with messages that fail authentication. This policy can be set to one of three options: none, quarantine, or reject. When the policy is set to none, the receiver will not take any action on messages that fail authentication. When the policy is set to quarantine, the receiver may still deliver the message, but mark it as potentially suspicious. When the policy is set to reject, the receiver will not deliver the message to the recipient’s inbox.

In order for DMARC to work, the domain owner must publish a DNS record that contains their DMARC policy. This record tells email receivers how to handle messages that fail authentication from that domain. The DMARC policy can also include instructions for how to report on messages that fail authentication, which helps domain owners identify and stop phishing attacks more quickly.

The Benefits of DMARC

Implementing DMARC provides several benefits for organizations:

The Importance of DMARC for Email Security 2

  • Protection against phishing and spoofing attacks
  • Greater control over email authentication
  • Increased visibility into email activity
  • Improved email deliverability
  • By preventing phishing and spoofing attacks, DMARC protects businesses from financial losses and reputational damage. DMARC also provides domain owners with greater control over their email authentication, which can help improve email deliverability and reduce the likelihood of legitimate messages being marked as spam. Finally, DMARC’s reporting features provide domain owners with visibility into email activity and can help identify potential phishing attacks and other security threats more quickly.


    Implementing DMARC is an important step for any organization that wants to protect its email systems from phishing and spoofing attacks. By providing greater control over email authentication and visibility into email activity, DMARC can help businesses prevent financial losses and reputational damage, and ultimately improve the security of their email systems. For a more complete understanding of the subject, visit this external website we’ve selected for you. Find additional insights here, uncover fresh viewpoints and supplementary data related to the subject.

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