How to Create a Mail Domain for existing website

Hi Guys,

I would like to know how we can create a Mail Domain to an already added website, as modify website it is not showing option to Create Mail Domain for the website.

I can create an email address for the website but not receiving any email sent to that email address.

As when creating website I did not checked the option for Create Mail Domain.

Any Idea how to resolve this @CyberPanel @qtwrk @usmannasir .