A catch-all email mailbox is one that gathers all the emails sent to nonexistent addresses. For example, if your email address is email@example.com, but somebody miswrites it and sends an email message to firstname.lastname@example.org, it will still be received in the catch-all mailbox that you have set up. Only one mailbox per domain name can have this feature enabled and thus you’ll never miss messages because the other side has an outdated address or has made a spelling mistake. The drawback of using a catch-all mailbox is that you may begin receiving a lot of spam email messages, but this issue can be fixed using an anti-spam filtering solution. It is also vital to remember that a mailbox with an enabled catch-all functionality cannot redirect inbound emails to a third-party mailbox.