From the reporting I’ve seen it appears that Kushner and the other staffers are forwarding or CC’ing all official emails to a government email account for proper archiving. As long as they aren’t sending classified info, they are in compliance with the law.
I like a good “gotcha” story as much as the next guy but this one doesn’t hold up. I am in favor of more Lego porn trolling. Everybody likes Legos.