Google smtp and pop

[Marc Auslander <marcausl@gmail.com>]

Google has now said they are pulling the plug on userid/password 
authentication for apps.

I use fetchmail and exim4 to get and send mail.  Neither, AFAIK, 
supports OAUTH2.  I'm also still on stretch but will update if I have to.

So what suggestions does anyone have for dealing with OAUTH2 access to 
gmail?