What Is a Catch-All Email Address and Should You Send to It?

Sometimes email verification comes back with a result that is neither clearly valid nor clearly invalid: catch-all, also called accept-all. Here is what that means and how to handle these addresses without risking your sender reputation.

What is a catch-all domain?

A catch-all domain is set up to accept email sent to any address at that domain, whether the mailbox exists or not. Send to anything@company.com and the server says yes. Companies do this so they never miss a message with a misspelled name, or to route everything to one shared inbox.

Why catch-all addresses are risky

Email verification works by asking the receiving server whether a mailbox exists. A catch-all server answers yes to every question, so nobody can be sure the specific person exists. That leads to a few risks:

• The message may be accepted and then bounce later, after the server checks it internally.
• It may land in a shared inbox that nobody reads, which lowers your engagement.
• Some catch-all domains are used as spam traps.

Should you send to catch-all emails?

It depends on where the address came from:

• The person gave it to you (signed up, bought something, replied to you): usually fine to send.
• It came from an old or unknown list: send with care, in a small separate batch, and watch the bounce rate.
• It is also a role address such as info@ or sales@: lower priority, best used for business contact only.

How NoBounch handles catch-all addresses

NoBounch marks these addresses as catch-all, separate from valid, invalid and disposable results. When you use bulk verification you can download the catch-all emails as their own file and decide what to do with them, while the valid file stays safe for your main campaign.

Tips for sending to catch-all contacts

1. Send to your valid contacts first, and to catch-all contacts in a smaller follow-up batch.
2. Remove anyone who bounces from the catch-all batch straight away.
3. Remove contacts who never open or click after several emails.
4. Keep your overall bounce rate under 2%.

Related: hard bounce vs soft bounce.