The requested domain name is not configured for any web site:
https://alimentosmascotas.mercola.com:443/suscripcion/optin.html?p=https://alimentosmascotas.mercola.com/proteina/pavo.html
If you're an administrator of this site, you need to go to
Site Manager -> Sites
and use the following domain name either in the Site properties or add a new domain alias:
alimentosmascotas.mercola.com:443