https://play.google.com/store/apps/details?id=com.penzasoft.checkmail
Incoming Mail (POP) Server Server - pop.mail.yahoo.com Port - 995 Requires SSL - Yes
You have to go https://login.yahoo.com/account/security#other-apps and turn on “Allow apps that use less secure sign in”, otherwise no working.
https://help.yahoo.com/kb/SLN4724.html
origin - http://www.pipiscrew.com/?p=6480 android-check-mail-56kb