A catch-all mailbox is one that captures all the messages sent to inactive addresses. For instance, if your address is info@domain.com, but someone misspells it and sends an email to inof@domain.com, it will still be received in the catch-all mailbox that you have created. Only one mailbox per domain name can have this feature enabled and thus you’ll never miss emails because the other side has an obsolete email address or has made a spelling error. The drawback of configuring a catch-all mailbox is that you may begin receiving lots of unsolicited bulk emails, but this problem can be resolved by using an anti-spam protection solution. It is also vital to remember that a mailbox with an enabled catch-all functionality cannot forward inbound emails to a 3rd-party address.