A catch-all e-mailbox is one that gathers all the messages sent to non-existent email addresses. For example, if your address is email@example.com, but somebody mistypes it and sends an email message to firstname.lastname@example.org, it will still be received in the catch-all mailbox that you have created. Just one mailbox per domain can have this feature enabled and thus you will never miss messages because the other side has an obsolete address or has made a spelling mistake. The disadvantage of creating a catch-all mailbox is that you may begin receiving plenty of unsolicited messages, but this problem can be rectified using an anti-spam protection solution. It’s also important to remember that a mailbox with an activated catch-all functionality cannot forward incoming email messages to a third-party mailbox.