A catch-all mailbox is one that gathers all the email messages sent to invalid email addresses. For example, if your address is info@domain.com, but someone mistypes it and sends an email message to inof@domain.com, it will still be received in the catch-all mailbox that you have set up. Just one single mailbox per domain can have this feature activated and thus you will never miss emails because the other side has an obsolete address or has made a typographical error. The disadvantage of using a catch-all mailbox is that you may begin receiving lots of unsolicited email messages, but this problem can be rectified by using anti-spam protection software. It’s also crucial to bear in mind that a mailbox with an activated catch-all functionality cannot redirect incoming email messages to a 3rd-party email address.