Contact form error

Hello,

I need help with contact form. In section for e-mail:
To [_site_admin_email]

From [_site_title] <[client_email]>
!(configuration error) Sender email address does not belong to the site domain.

i don't know what to put in from section because i need client email but anyone can apply by this form and I don't know what to put in this section.

This is code for contact form:

[email* client_email class:form-input placeholder "Your email"]



Please, I really need Your help urgently.

The page I need help with: [log in to see the link]