I got twice an email back stating,
email@example.com 5:38 PM (3 hours ago) to me We're sorry, but your email message to ["firstname.lastname@example.org"] (titled ES 0.90, disable_delete_all_indices) didn't work. Your account does not have the required trust level to post new topics to this email address. If you believe this is in error, contact a staff member.
.. what am I missing ?