Does American English allow the use of "email" as a mass noun, in such a way that it is not uncommon to hear any such of the following phrases from native speakers?
I've still got a huge backload of email I'm trying to get through.
I've forwarded without comment a couple of pieces of email that I received overnight.
There's one last piece of email to read.
On average, three to six pieces of email are returned to the library every week.
Billions and billions of pieces of email are transmitted daily.
How much email do you have in your inbox?
Are you sending too much or too little email to prospects?