Originally Posted by DSPKweb:
Mine has worked since release day just by entering the email address and password, letting the Pre do the rest. I did do the workaround to get my hotmail forwarded to my gmail account, but never had an issue with my yahoo one.
Would definitely try and log in from a computer first to make sure you have the correct email/password.
I did mine the same way and I'm not having any problem getting my Yahoo mail.