So I’m assuming you are referring to receiving an email about an outdated mobile app version and would like this notification to let you know which device(s) it refers to.
I’d be more than happy to pass along this feedback to our dev team for consideration. We always appreciate input on how we can improve the Dropbox service!
Hope you have a great day - Thanks!
PS. I moved your thread to the Share an idea section so that others may also let us know their interest in this.