How to switch BACK to VZ "native" mail from VZ Yahoo?

I have Verizon DSL with the Yahoo! "customer experience" (I believe this is what it's called). Today when I tried to log in to my email I got a message saying I would have to upgrade to the "new" Yahoo! mail. I don't want to upgrade to the new mail and want the old Verizon mail back. I have searched everywhere for how to do this and can't find how it's done. Is it no longer possible to get the old Verizon mail and dump the Yahoo! veneer? I hate the new Yahoo! with all its bells and whistles and social media foolishness and just want email that's email. I don't want to fiddle around with Pop programs or whatever they're called. Can anyone please let me know how to do this if it's at all possible?