A catch-all email mailbox is one that captures all the messages sent to nonexistent addresses. For instance, if your address is email@example.com, but someone miswrites it and sends an email message to firstname.lastname@example.org, 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per domain name can have this feature activated and thus you will never miss emails because the other party has an out-of-date address or has made a spelling error. The drawback of creating a catch-all mailbox is that you may start receiving lots of spam, but this problem can be resolved by using anti-spam protection software. It’s also vital to keep in mind that a mailbox with an enabled catch-all functionality cannot redirect inbound emails to a third-party address.