when trying to download emails for my yahoo account I keep getting the following error message:  The server for account "Yahoo" returned the error "[AUTH] Access to this service is not permitted.." Your username/password or security settings may be incorrect. Would you like to try re-entering your password? 

weird thing is that i have two other yahoo accounts under the same passowrd and security settings that work fine?  I have tried uninstalling the account and adding it back only to have the same problem.  The address has worked fine for over a year and all of a sudden started this two days ago.