From the comments column this am came that gem.
Look, this is a business letter. Write it like you actually would like to do business with me.
Leaving off the "dear" and the "thank you" is one more sign that you haven't quite realized that.
I get letters like this all the time. I don't have to worry about the people who write them, mostly, cause they've been so busy visualizing success they haven't acutally had time to buckle down and do the writing.
If you don't know what a standard business letter looks like there are tons of examples including one in my red Websters dictionary amazingly enough.