Formality will get you everywhere
These are the letters most likely to have a very fancy banner, followed by an important note from the Dean or even more exiting, the President of the college.
The body of the message will include all the important information about how well the school is ranked nationally. You know, for something. Not necessarily US News rankings or even ATL rankings. But they’ll dredge up something they are presumably the best at, even if it is only moot court rankings.