A catch-all e-mailbox is one that collects all the emails sent to inactive addresses. For example, if your address is email@example.com, but someone mistypes it and sends an email message to firstname.lastname@example.org, it will still be received in the catch-all mailbox that you have created. Only one mailbox per domain name can have this feature enabled and thus you will never miss emails because the other side has an outdated email address or has made a typographical error. The downside of creating a catch-all mailbox is that you may begin receiving lots of unsolicited messages, but this problem can be resolved by using an anti-spam filtering solution. It’s also important to keep in mind that a mailbox with an enabled catch-all feature cannot redirect incoming email messages to a third-party mailbox.