Create DNS WebHop record in MIAB DNS Server?

Hi,
I found the solution by searching this forum for redriction.

Please check this link: Best way to redirect root page to /mail?

I simply change the configfile /mailinabox/conf/nginx.conf

        location / {
                 #return 301 https://$HOSTNAME$request_uri;
                return 301 https://$server_name/mail;
        }

and than rerun the setup.