I’ve never emailed him myself, but I can imagine that he must have a lot of email to go through so it may take a while (and maybe a few tries) before getting a response. Did you want to email him specifically or a rav?
The email is on the Ohr Naava site.
(adorable might be able to help you out about emailing him, IIRC she once said she did.)
Hatzlacha