The error code 475 in Yahoo Mail occurs when Yahoo notifies any suspicious or unusual activity in a user's account, and the result is that the Yahoo server will block the user's email ID for a few hours to protect the user account. If you too are experiencing this error in your Yahoo account then you have no need to be worried, because to solve your problem here I am sharing a useful blog which will help you to fix Yahoo error code 475. You can fix it quickly with the help of my blog.