Help notifications for priority email senders in

On my old S4, when I received an email from someone in my priority sender list, it would notify me with the notification sound I chose. On my s6, I set up my priority senders list with the notification sound I want... but the phone does not notify me. It just puts the email in my inbox with al the rest. I do not check my emails when working out in the field , but if certain people send me emails I want to be notified