How to set email

Hello everyone, first post here!

I'm really new here and this is my first time with servers (vps) and my provider just gave me an cwp7.admin panel and i would love to set up the email with my custom domain, the problem is, when i go to Navigation > Email > Email accounts and click on the "add new domain email" button a modal pops up and ask me to select an user, which i don't have (and since i have another process running in paralel with cwp and it needs to be accessed throught the same domain (on another port) i dont want to delegate the domain to some random user created only for email stuff), so the question is:

How can i set up an email with my domain from the cwp7.admin without having to delegate my domain to some user? is this possible?

Thanks for reading, i hope tat yo have a great day!

nope not possible it should be in some user account

So which is the best way to achieve this, i mean having in consideration of my other service, will it be still accesible if i delegate the domain to some user? will i have to move the index.html from the cwp to the user?

you can host your website else where and emails on CWP server.
to do this use the MX DNS to point to the email CWP server which you're using.