What is Email Authentication? (Definition)

Email Authentication is the verification of incoming emails by ISPs to ensure that they were sent from real domain owners and not spam.  SPF, DKIM, and DMARC are among technologies that are used in the email authentication process. Learn more about SPF, DKIM, and DMARC

Emails that fail the authentication test are either considered spam and sent to the spam folder or are rejected. 

Example of Email Authentication: Lewis sends an email marketing campaign to his subscribers who are using Gmail from his email domain support@Lewis…com.  However, Lewis has not set up SPF and DKIM which are used to verify that the campaign originated from his email domain. The email campaign arrives at Gmail servers to be authenticated and delivered to his subscribers. Since Lewis did not set up SPF and DKIM, Gmail is not able to verify that the email campaign originated from Lewis..com domain. It therefore considers Lewis’s email campaign as spam since it has failed the email authentication test.  

Benefits of Email Authentication 

The two main benefits of email authentication are: 

Improve email deliverability: By setting up SPF and DKIM records properly for authentication, your email campaigns will be delivered to your subscriber’s inbox. 

Security: It prevents spammers from using your domain identity to spam people 

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