wordpress post by email not receiving from jotform

Hi I've set up a jotform to send submission email notifications to wordpress at a 'post by email address' however submissions are not going through.

They are however being received by any other email address. And if I forward these emails to wordpress as a post by email - they get published.

Please advise

Please check my reply in your other thread here https://www.jotform.com/answers/986789.

Thanks!