Glossary
Email authentication
Records and signatures (SPF, DKIM, DMARC) that let receivers check a message really came from the domain it claims.
ValidReach Team · Updated 2026-10-26
In practice
It proves the sender, not the recipient. A properly authenticated domain is a precondition for good delivery; it does not make an invalid address deliverable.
Verification and sending
Authentication covers the sending side; verification covers the recipient side. A campaign needs both.