A catch-all e-mailbox is one that captures all the emails sent to inactive email addresses. For instance, if your address is firstname.lastname@example.org, but someone mistypes it and sends an email message to email@example.com, 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per domain name can have this feature activated and in this way you’ll never miss emails because the other party has an out-of-date email address or has made a typo. The downside of creating a catch-all mailbox is that you may start receiving plenty of unsolicited email messages, but this issue can be solved by using anti-spam filtering software. It’s also vital to bear in mind that a mailbox with an enabled catch-all feature cannot redirect inbound email messages to a third-party mailbox.