Email authentication
DNS-based signals that help receivers evaluate whether mail is authorized for a domain.
Why it matters
SPF, DKIM, and DMARC can reduce spoofing but do not guarantee a message is safe.
Example pattern
A domain publishes SPF and DMARC records for its sending services.
How CheckLink can help
Email Authentication Checker reads public records and explains the signals.
Related terms
Related guides
Check the signal in context
Security terms are useful, but real decisions need context. Use CheckLink to inspect available signals before you click.