Catch-all domain
Also called: Accept-all, Catch-all address
A catch-all (accept-all) domain’s mail server accepts email for any address at that domain, whether or not a mailbox with that name exists.
How it affects cold email
Because the server says yes to everything during the SMTP conversation, verification can’t tell a real person from a typo. Some of those emails later bounce or are silently discarded. Treat catch-all results as risky: send to them in small batches, and stop if bounces rise.
How Inboxed handles it
- Detecting catch-all domains needs a mailbox-level check, which Inboxed runs through a verification provider you connect with your own account. Catch-all addresses are labelled, can be filtered out of a campaign, and are still sendable if you choose to include them.
Related terms
Sources
Sources checked on 8 November 2026. Rules change, so check the source before you rely on a detail.
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