Some email addresses are invalid box on phone.

[Gbrad]

I have a new Moto Droid and recently added two more email addreses. All was fine for two days then all of the sudden today a box pops up on my home screen and everyother screen I get on that simply says

"Some email addresses are invalid"

I click on it and it does nothing. I cant figure out how to fix it or make it go away. HELP