glowing mail and message notifications

[zingerbb]

Can anyone tell me how to disable the glowing mail and message icons that appear while my phone is asleep and wake it up every minute or so (see attached image)? I've tried disabling notifications for both, I've searched forums and the web, all to no avail. I have a Nexus 5x running Android 7.1.2

Thank you!

 

[Rocketsaucev2]

Looks like it could be a third party app you may have installed. Tried any new apps recently?

 

[anon(123856)]

I would agree with Rocketsaucev2's post. I have a 5X with Nova Launcher and don't have anything like that showing up.