---
title: "Catch-All Email: Definition and Examples"
description: "A catch-all email setup accepts mail sent to any address at a domain, even addresses that don't exist."
path: /glossary/catch-all-email
family: glossary
updated: 2026-10-17
html: /glossary/catch-all-email
sources:
  - "https://www.rfc-editor.org/rfc/rfc5321"
  - "https://knowledge.workspace.google.com/admin/gmail/advanced/get-misaddressed-email-in-a-catch-all-mailbox"
facts:
  term: "Catch-all email"
  also_called: "catch-all address, catch-all domain, accept-all email, accept-all domain"
  category: "Deliverability"
---

# Catch-all email

A catch-all email setup accepts mail sent to any address at a domain, even addresses that don't exist. Because the server says yes to everything, verification tools can't confirm whether a specific mailbox is real and label it catch-all or risky.

## What Is Catch-All Email?

**In short:** Companies turn on catch-all so mail with a typo, or sent to a former employee, still reaches someone.

Google Workspace, for example, has a routing setting that sends misaddressed mail to one chosen user or group. Separately, RFC 5321 lets any server accept a recipient during the SMTP conversation and report problems later, which looks the same from outside.

It breaks the mailbox check. A verifier asks the server whether it accepts jane@example.com and gets yes. It asks about a random string at the same domain and also gets yes. So the result is catch-all, not valid. Some of those addresses are real, and others land in a shared inbox nobody reads or bounce later.

## Catch-All Email Example

Example: a list of 1,000 contacts verifies as 700 valid, 80 invalid and 220 catch-all. The team sends the 700 first. It then sends 50 catch-alls from a single mailbox, sees 1 bounce (2%) and sends the rest at the same slow pace, ready to stop if bounces climb.

## Catch-All Email in Practice

Teams handle catch-alls separately. Send to verified addresses first, then send to catch-alls in small batches from one mailbox, watch bounces and drop any domain that starts rejecting mail.

## FAQ

### What is a catch-all email address?

An address on a domain whose mail server accepts mail for any address, real or not. Mail to a nonexistent address at that domain doesn't bounce right away.

### Should you send to catch-all emails?

Carefully. Many are real, but some bounce later or go to an unread shared inbox. Send to verified addresses first, then test catch-alls in small batches and stop if bounces rise.

### Why can't email verification confirm catch-all addresses?

Because the server answers yes for every address at the domain, including made-up ones. The SMTP check has nothing to tell a real mailbox apart from a fake one.

### How do you know if a domain is catch-all?

Ask its mail server whether it accepts a random address that can't exist, such as a long string of letters. If the server accepts it, the domain is catch-all. Verification tools run this test for you.

## Do this in Ken

### Do This in Ken

Ken Search labels catch-all addresses separately from valid ones and runs them through a dedicated catch-all check. You pay 1 credit only for an email that comes back valid.

- Link: [Do This in Ken](/features#list-building)

## Related

- [GTM Glossary](/glossary): Every GTM term, grouped by topic.
- [Email verification](/glossary/email-verification)
- [Email bounce rate](/glossary/bounce-rate)
- [MX record](/glossary/mx-record)
- [Waterfall enrichment](/glossary/waterfall-enrichment)
- [Sender reputation](/glossary/sender-reputation)
- [Ken](/features#list-building)

## Sources

| Source | URL | Checked |
| --- | --- | --- |
| RFC 5321: Simple Mail Transfer Protocol | https://www.rfc-editor.org/rfc/rfc5321 | 2026-10-17 |
| Google Workspace Admin Help: Get misaddressed email in a catch-all mailbox | https://knowledge.workspace.google.com/admin/gmail/advanced/get-misaddressed-email-in-a-catch-all-mailbox | 2026-10-17 |

## Changelog

- 2026-10-17: Page published.