A catch-all e-mailbox is one that captures all the messages sent to non-existent email addresses. For instance, if your address is email@example.com, but somebody miswrites it and sends an email to firstname.lastname@example.org, 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mailbox per domain can have this feature activated and thus you’ll never miss emails because the other side has an out-of-date email address or has made a spelling mistake. The disadvantage of creating a catch-all mailbox is that you may begin receiving a lot of junk messages, but this issue can be resolved by using an anti-spam filtering solution. It is also essential to keep in mind that a mailbox with an active catch-all feature cannot forward incoming messages to a 3rd-party address.