Just job my Maxx a couple of days ago. Setup my Yahoo account and has been working fine until this morning. Now I get an authenication error. Exact message... "Communication error... The follwoing error has prevented a successful connection: Incorrect username or password. Visit settings to correct. [NO Mechanism not available]". I then go to settings to re-enter password with no luck. Can't even delete the account, I guess because it thinks the password is wrong. Yahoo account works if I go to the internet.
I also download Yahoo Mail for Android and now I can't find it anywhere in my apps. Never mind on this I found it.