DKIM
DomainKeys Identified Mail, an email authentication method that signs messages with a domain key.
Why it matters
DKIM can help show whether a message was altered and whether a signing domain is present.
Example pattern
Authentication-Results includes dkim=pass or dkim=fail.
How CheckLink can help
CheckLink can display DKIM results found in pasted headers without sending the header text to the server.
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.