As the name says, a catch-all address is meant to catch all email sent to any non-existing email accounts on your domain.

It can be useful to catch emails that were mistakenly sent to an address that doesn't exist. For example, if the sender made a spelling mistake and typed in "daivd@domain.com" instead of "david@domain.com".

Unfortunately, most mails that you catch will be spam. If you decide to use the catch-all feature, we recommend that you create a separate account for this on your own domain, and periodically check if you have caught any emails that you want to keep.

Set up a catch-all address

1. Log in to the One.com control panel.
2. Click on the Email tile to open Mail Administration.
3. Scroll to Catch-all address.
4. Select the option for "Use the following 'catch-all' address" and type in the email address that should become your catch-all address.
5. Click Save.

Related articles:

How do I create an email alias?

How do I automatically forward email to another account?