A catch-all mailbox is one that collects all the email messages sent to invalid email addresses. For example, if your email address is info@domain.com, but someone miswrites it and sends an email to inof@domain.com, it will still be received in the catch-all mailbox that you have set up. Just one mailbox per domain name can have this feature enabled and in this way you will never miss messages because the other party has an out-of-date email address or has made a spelling mistake. The disadvantage of setting up a catch-all mailbox is that you may start receiving plenty of unsolicited emails, but this problem can be rectified using an anti-spam filtering solution. It’s also important to know that a mailbox with an enabled catch-all feature cannot forward incoming emails to a 3rd-party email address.