A catch-all e-mailbox is one that captures all the email messages sent to inactive addresses. For example, if your email address is firstname.lastname@example.org, but someone mistypes it and sends a message to email@example.com, it will still be received in the catch-all mailbox that you have created. Just one mailbox per domain can have this feature enabled and thus you will never miss messages because the other side has an out-of-date email address or has made a typographical error. The drawback of having a catch-all mailbox is that you may start receiving a lot of unsolicited messages, but this issue can be fixed using anti-spam protection software. It’s also crucial to know that a mailbox with an active catch-all functionality cannot forward inbound messages to a third-party email address.