A catch-all e-mailbox is one that captures all the email messages sent to invalid email addresses. For instance, if your address is firstname.lastname@example.org, but somebody misspells it and sends a message to email@example.com, it will still be received in the catch-all mailbox that you have set up. Only one mailbox per domain name can have this feature activated and in this way you will never miss emails because the other side has an obsolete address or has made a typo. The drawback of setting up a catch-all mailbox is that you may begin receiving plenty of spam email messages, but this problem can be solved using anti-spam protection software. It is also essential to remember that a mailbox with an activated catch-all feature cannot redirect inbound email messages to a 3rd-party email address.