Catch-All Email
An email server configured to accept emails sent to any address at the domain, even if the specific address doesn't exist.
A catch-all domain accepts all emails regardless of the specific address. Sending to catch-all addresses is risky because you can't verify if the actual recipient exists — the email won't bounce, but it might not reach a real person.
Email verification tools flag catch-all addresses differently. Some cold emailers include them (they won't bounce), others exclude them (lower engagement). The recommended approach: include catch-all addresses but monitor engagement separately.