A catch-all e-mailbox is one that gathers all the emails sent to non-existent addresses. For instance, if your email address is email@example.com, but someone miswrites it and sends a message to firstname.lastname@example.org, it will still be received in the catch-all mailbox that you have created. Just one single mailbox per domain can have this feature activated and in this way you’ll never miss emails because the other party has an out-of-date email address or has made a mistake. The negative aspect of creating a catch-all mailbox is that you may begin receiving plenty of junk emails, but this issue can be rectified using anti-spam protection software. It’s also essential to remember that a mailbox with an active catch-all feature cannot forward inbound messages to a third-party address.