A catch-all email mailbox is one that collects all the email messages sent to non-existent addresses. For instance, if your address is info@domain.com, but someone mistypes it and sends an email message to inof@domain.com, it will still be received in the catch-all mailbox that you have set up. Only one single mailbox per domain name can have this feature enabled and thus you’ll never miss messages because the other side has an out-of-date address or has made a spelling mistake. The negative aspect of setting up a catch-all mailbox is that you may start receiving a lot of spam messages, but this issue can be fixed by using anti-spam filtering software. It is also important to keep in mind that a mailbox with an activated catch-all feature cannot redirect incoming email messages to a third-party email address.