The Problem: All of a sudden, WordPress notifications (and Gravity Forms notifications as well) weren’t working from our client’s site. It turns out that WordPress admin notifications stopped working when they switched over to Office365.
To try and solve the problem, we installed the Easy WP SMTP plugin with the following SMTP settings:
However, the notifications still didn’t work!!!
The solution: If you are using cPanel, go to MX Entry and select Remote Mail Exchanger!