Yahoo Mail not working with Apple Mail app

So when I try to set up my Yahoo mail, I have never had an issue before. As of yesterday when I send an email it says my username/password is wrong. It still receives emails ok. I deleted and reinstalled the email a number of times with no luck. The only solution is manually setting up the Yahoo account instead of just clicking on the Yahoo option. This works fine but I can't bring my calendar over when I do it that way.

Yahoo says that Apple must have a glitch when it grabs the information for the outgoing server. Is anyone else having that problem?

Ryan