Message authentication confirms an email is really from the domain it claims. Learn the roles of SPF, DKIM, and DMARC.
Message authentication is the set of methods that help receivers verify an email’s legitimacy. SPF checks sending sources, DKIM checks cryptographic signatures, and DMARC ties the results to the visible From domain.
Strong authentication reduces spoofing and can improve deliverability. It also helps receivers apply your policy when messages fail checks.