Why is there a "Inbox" account in my list of Inboxes?
This Inbox is a catch all for emails that do not have a specific email account added. For example if you firstname.lastname@example.org forward into your Inbox account, but you have not specifically added this account to your Inbox list. The emails from this account would then end up in the Inbox section of your account list. You cannot configure an email address for this Inbox .