(Shopify) Domain authentication has failed. Review your DNS configuration and try again

Hello! We have encountered an error message while authenticating our sender email. The message states that our domain authentication has failed and we need to review our DNS configuration. We followed the steps suggested by Shopify, but the issue persists. We would appreciate your help in resolving this matter. Thank you!

Make sure any CNAMEs and A/AAAA records pointing to Shopify are set to “DNS only” (Shopify already uses Cloudflare).

Otherwise, what is the domain and what are the settings you are being asked to set?