not getting email

Hi, I’ve followed the instructions in the documentation carefully. When I send a test email I receive it, but not from the contact form itself on my site. My host has been unable to resolve the issue.

Are there any settings in my cpanel that I control that would help?
Or any suggestions for my host to allow emails from the form on my webpage?

Thx.

https://wordpress.org/plugins/si-contact-form/