A catch-all e-mailbox is one that gathers all the messages sent to non-existent addresses. For example, if your email address is email@example.com, but someone miswrites it and sends an email message to firstname.lastname@example.org, it will still be received in the catch-all mailbox that you have created. Only one single mailbox per domain name can have this feature activated and thus you will never miss messages because the other side has an obsolete email address or has made a typo. The drawback of setting up a catch-all mailbox is that you may start receiving plenty of junk email messages, but this issue can be rectified using anti-spam protection software. It’s also important to remember that a mailbox with an enabled catch-all feature cannot forward inbound emails to a third-party mailbox.