A catch-all email mailbox is one that captures all the emails sent to invalid addresses. For example, if your email address is info@domain.com, but somebody miswrites it and sends a message to inof@domain.com, it will still be received in the catch-all mailbox that you have configured. Just one mailbox per domain name can have this feature activated and thus you will never miss emails because the other party has an out-of-date address or has made a spelling mistake. The negative aspect of creating a catch-all mailbox is that you may start receiving plenty of spam emails, but this problem can be resolved using an anti-spam filtering solution. It’s also vital to know that a mailbox with an active catch-all feature cannot redirect incoming messages to a 3rd-party address.