A catch-all e-mailbox is one that collects all the emails sent to inactive email addresses. For example, if your address is email@example.com, but somebody miswrites it and sends a message to firstname.lastname@example.org, it will still be received in the catch-all mailbox that you have configured. Just one single mailbox per domain name can have this feature activated and in this way you will never miss messages because the other party has an out-of-date address or has made a spelling mistake. The negative aspect of configuring a catch-all mailbox is that you may start receiving plenty of unsolicited bulk email messages, but this problem can be rectified using anti-spam filtering software. It’s also essential to remember that a mailbox with an enabled catch-all feature cannot forward inbound email messages to a third-party mailbox.