A catch-all email is a powerful tool that allows you to catch any messages sent to misspelled or invalid email addresses.
To start catching all the emails that are being sent to your domain, open your Emails → domain name page and scroll down to the Manage Email Accounts section.
Once there, click on the Options (⋮) button in front of the email account in question:
And choose Create Catch-All:
In the pop-up window, just click on Make Catch All to confirm:
That's it! From now on, all messages from your domain will be forwarded to the email address you specified.