Catch-all email
A catch-all email is an address on a domain whose mail server accepts messages for any address, real or not. Because the server says yes to everything, a verifier cannot tell whether the mailbox exists, and a message to it may still bounce later.
Why a domain accepts every address
A company sets up a catch-all so that mail sent to a misspelled or retired address still reaches someone. Google Workspace, for one, lets an admin route messages for non-existent or incorrect addresses in the domain to a single catch-all mailbox.1 The setting helps the company and gets in the way of anyone checking a list.
Why a catch-all cannot be verified
A verifier asks the receiving server about one mailbox with the RCPT TO command, and a 250 reply means the server accepted it.2 A catch-all server gives that reply for every address on the domain. To spot one, a verifier also asks about an address nobody would have, such as a long random string. If that is accepted too, the domain is catch-all, and a 250 for the real name tells you nothing.
The trouble shows up later. A server that accepts a message and then cannot deliver it must send a failure notice back to the sender.2 So a catch-all address can pass the check, take the message and bounce it afterwards, or deliver it to a shared mailbox nobody reads.
How to handle catch-all addresses
- Check the pattern. If the addresses you know work at that company, such as ones that have replied, follow first.last, an address in the same pattern is a better bet.
- Keep them in their own group. Send to catch-all addresses as a separate segment, so their bounces do not hide in the main numbers.
- Start small. Send to a few first and watch what bounces before you send to the rest.
In the Find work email column of GetSales, a verifier is optional. With one picked, Accept catch-all emails is on by default, so a catch-all address is accepted and the chain stops. Switch it off and a catch-all address no longer counts as accepted, so the next finder runs.
Related
- Email verification: check the addresses your list already has.
- Email finder: a work email from a name and a company, one finder after another.
- Waterfall enrichment: finders in the order you set, each address checked by the verifier you pick.
Sources
- Google, Get misaddressed email in a catch-all mailbox, Google Workspace Admin Help, last updated 26 October 2026. Read 28 October 2026.
- Internet Engineering Task Force, RFC 5321: Simple Mail Transfer Protocol, sections 3.3 and 6.1, October 2008. Read 28 October 2026.
Last updated: October 2026