A catch-all e-mailbox is one that gathers all the emails sent to inactive addresses. For instance, if your email 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one mailbox per domain can have this feature enabled and thus you’ll never miss emails because the other side has an outdated address or has made a spelling error. The negative aspect of having a catch-all mailbox is that you may start receiving a lot of unsolicited email messages, but this issue can be solved using an anti-spam filtering solution. It’s also crucial to know that a mailbox with an enabled catch-all feature cannot redirect inbound messages to a third-party email address.