Return-Path
The email address used for bounce handling and delivery feedback.
Why it matters
Return-Path can reveal a sending system or domain that differs from the displayed sender.
Example pattern
A business-looking message has a Return-Path on an unrelated domain.
How CheckLink can help
CheckLink displays Return-Path when present and treats mismatches as context, not proof.
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.