Catch-all domains accept any recipient address, complicating verification. Learn how catch-all detection works and what it means.
Catch-all detection attempts to determine whether a domain accepts all recipients regardless of mailbox existence. It matters for verification tools because acceptance doesn’t guarantee a real user.
Catch-all results should be treated as risky rather than valid. Engagement and gradual sending are safer strategies than assuming deliverability for unknown catch-all addresses.