My Yahoo mail syncing just quit on my. I got an email from VZQ saying:
"Your account email@example.com could not be authenticated. If you have recently changed your emial password (I HAVE NOT), please enter the most current password in settings to continue receiving emails.
Upon re-typing my password settings I get the following message:
"Cannot connect to Server. Your server is not responding" for Yahoo mail client
Sounds like someone has got access to your account and changed your password, I suggest you go to Yahoo account on a pc and change password
I am having the same exact issue. Has nothing to do with someone changing your password. I can log into my account on the computer just fine. If I find a fix i will post it here.