Sounds to me like you need a new Strata Manager – maybe someone from the same firm would be more empathic. Meanwhile, sit this one down and tell him you are going to handle all mail-outs – if there's any statutory obligations, he just needs to let you know what's required and you'll write it up and he can send it out.
You can't create good communication skills in people but this guy doesn't even seem to have the good sense to let you get on with it. Check his contract then have a serious chat.