A catch-all mailbox is one that captures all the messages sent to invalid addresses. For example, if your email address is info@domain.com, but someone misspells it and sends an email message to inof@domain.com, it will still be received in the catch-all mailbox that you have configured. Just one single mailbox per domain can have this feature enabled and thus you’ll never miss emails because the other party has an outdated email address or has made a typographical error. The disadvantage of configuring a catch-all mailbox is that you may begin receiving a lot of unsolicited email messages, but this issue can be solved using an anti-spam protection solution. It is also vital to know that a mailbox with an enabled catch-all functionality cannot redirect incoming email messages to a 3rd-party mailbox.