Quick summary
- Term
- Email Authentication
- Plain-English definition
- Email authentication is the use of DNS and cryptographic checks to prove that messages are allowed to use a domain.
- Technical definition
- Email authentication is the use of DNS and cryptographic checks to prove that messages are allowed to use a domain.
- Commonly confused with
- Related domain, DNS, registrar, API, or agent-infrastructure terms.
Definition
Email authentication is the use of DNS and cryptographic checks to prove that messages are allowed to use a domain.
Why it matters
SPF, DKIM, and DMARC help reduce spoofing and improve deliverability.