How to Setup Email Authentication in cPanel

cPanel's email authentication feature declares which servers are authorized to send mail, and helps receiving servers verify that the email they received is coming from a trusted sender.

If someone, such as a spammer or malicious actor, were to send a spoofed email claiming to be from a certain domain name, spam filters on the receiving end would detect that the email was not coming from an authorized server, and flag the message as possible spam or a possible phishing attempt.


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