A catch-all e-mailbox is one that gathers all the messages sent to non-existent email addresses. For instance, if your address is firstname.lastname@example.org, but somebody mistypes it and sends a message to email@example.com, it will still be received in the catch-all mailbox that you have configured. Just one mailbox per domain can have this feature enabled and in this way you will never miss emails because the other party has an out-of-date address or has made a mistake. The disadvantage of configuring a catch-all mailbox is that you may start receiving lots of junk messages, but this issue can be solved by using anti-spam protection software. It’s also vital to bear in mind that a mailbox with an active catch-all feature cannot redirect incoming emails to a 3rd-party address.