Catch-All Email
A mail server configuration that accepts mail for any address at a domain, making it impossible to confirm whether a specific mailbox exists via SMTP alone.
Why it matters for email security
Understanding catch-all email helps you build signup flows that resist fake accounts, disposable inboxes and automated abuse. VeriShield Edge operationalizes this signal as part of its transparent 0-100 fraud score.
Related concepts
Explore the full glossary or the domain directory to see these signals applied to real domains.