it's not pishing mail.
if you already logged in satoshibet you get into that slotgame with bonus.
I received this type of mail and was sent by satoshibet with daily bonus code of 10mbtc and it took me direct to site and credited my account . This is new way of giving bonus code from now . I think everyone one will receive daily bonus code direct in e-mail. Need not to worry about this email .