different sound for certain sender email address (e-mail gateway)

I would like to see different sounds for different email sender adresses via the e-mail gateway.
Or at least one "priority sender group" that plays a different sound upon notification.

Sometimes I have important phone calls while on the road - so it would be super convinient to have another "priority" sound when such a notification arrives (so I can return the call immediately).

Another colleague gets important mails AND Etsy sales (that are much more important to him) via Pushover and would love the feature, too.

Thanks for considering.