What is a catch-all address?
A catch-all address is an email address that captures all the emails sent to non-existent email addresses, such as in the case of misspelled email ids. All emails that are addressed to the domain, but don't have the right email id will be received and stored by the catch-all address. This makes sure that important emails don't go unnoticed due to careless manual errors. It also helps to prevent important emails sent to your domain from bouncing back.