Very frustrated how much of my precious time I've spent trying to fix this!! I have Yahoo mail, and have it on the stock app for mail. All was fine until the new software update. Now my MS exchange gives me notifications, but not my Yahoo. I've tried all the suggestions, but in my mail settings I cannot clear data and cache. Data is greyed out. I tried all the suggestions to help it get shown (Force stop app first, then try
Delete email account from stock app before attempting to clear data
try a soft reset
under running apps, try stopping all email services like 'EmailDebugService', 'MailService', etc) and still I cannot select clear data. I want to scream and cry I'm so frustrated. Just want to be notified when I get emails!!! Please help!!