OK, noob question: how do I restart Gmail?
Mine has been like this for 4 days... yes, how do you restart gmail.
I've had that happen before, it didn't send for days. try going into settings>applications>manage applications. then the menu key at bottom>filter>all>gmail storage>clear cache and data. If still doesn't send, u might have to do the same, except go to gmail instead of gmail storage.