Default [Q] Email app that hides in for sent emails

So basically long story short. Work issues. Have a fake email, and I want to send an email but don't want there to be any possibility of them knowing my location.

I know I can use vpn, but is there an email app that does this automatically.. or maybe some way to associate an email app with a vpn so it turns on and of when I use a particular email app?

Hope this makes sense.