First, let him email whoever he wants, but make sure he knows something about the school. The coaches wont take him seriously if all he writes is " I want to play lacrosse" Tell him to get a little information, then he can email away. there is no harm going big. Just have him look at other programs as well.
Cool, thanks. I gave him a list of all of the D 1 and the top D2 schools to think about. I told him to write down why he wants to go to those schools. Just want him looking at other options without discouraging him.