I am certain they have email adresses, but they dont make them public probably becouse they know they will be swamped with issues like ours. National sailing MNAs are usually reachable by email, but the IOC have choosen not to be accessible by email.
Certainly the secretaries will deal with regular mail, but if they get real letters they know people are really serious about it. There is a certain logic behind the reasoning, whether it is smart/good or not.
I think we will have to play by their rules if we are to influence them directly.