This is a short tutorial on the steps required to turn off live tile in Mail App on Windows 8. Windows Mail app by default is added as part of the live tile. And the mail app displays the subject of the unread emails in live tiles along with count of unread emails.
There is also an option available for the users turn of the lives tiles for an app. Right click on the Mail App and this should display the following list of option at the bottom of the Window 8 start screen.
Now select Turn live tile off option to disable the display of unread mails.