Email Authentication
Email Authentication and Domain Trust
Email authentication is one of the most practical areas of modern DNS and security because it affects spoofing risk, inbox trust, and deliverability.
When a domain sends email, receiving systems want proof that the domain really authorized the message.
This hub organizes the key building blocks so readers can understand the full email trust model more easily.
Start here
Core authentication records
DNS records that support mail
Operational trust and filtering
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