Ok, I am trying to figure out whats going on. I have 2 DI for myself and girlfriend. I have my email (gmail and yahoo) setup through the HTC Mail Client and they work fine.....I setup my other phone the same way and it worked fine, but once the yahoo account completed the process of downloading the inbox, I got an Authentication Error stating the login was incorrect. The login is not wrong and works fine to login via the standard web page. I tried to delete the Yahoo Account on the HTC, but when I went to setup again I had the same issue.....Not sure how or why this could be happening. Any advice is appreciated. Also verified all the yahoo email settings on my working device and they are all the same on the other device with the issue.