Domain worked for me and a few others, but having trouble with other recipients opening my domain

Question:
I have a relatively new domain and it works for me and a few others I have sent it to, but there are others that are having trouble opening my domain. Would there be any reason why some can and others can’t view it? DNS is correct.

Product:
Wix Editor

What are you trying to achieve:
Need ALL recipients to see my domain.

What have you already tried:
Just checked with others to see if they could view it, and checked DNS settings