When you are in a professional setting and are in a mood to send email’s that point fingers, complain, rant, or is more or less counter productive, it would be wise to send that message to as few people as possible.
Why? Because four out of five times you are going to embarrass yourself. It’s likely that you are either wrong, un-informed, it’s over your head, or you are completely at fault for the issue in the rant.
Save yourself the embarrassment and ask someone in the know before you play the blame game.