A catch-all e-mailbox is one that collects all the email messages sent to inactive email addresses. For instance, if your email address is info@domain.com, but someone misspells it and sends an email message to inof@domain.com, 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 thus you will never miss emails because the other party has an obsolete email address or has made a typographical error. The downside of having a catch-all mailbox is that you may begin receiving lots of unsolicited bulk emails, but this issue can be rectified using anti-spam protection software. It is also crucial to keep in mind that a mailbox with an enabled catch-all functionality cannot redirect incoming messages to a 3rd-party address.