Your domain must follow one of these formats: "www.mysite.com" or "blog.mysite.com."
This error message appears if you're trying to connect a top-level domain to HubSpot rather than a subdomain. In order to connect your root domain to HubSpot, you'll first need to connect a subdomain (like "www") and then set up a 301 redirect from the root domain to the subdomain ("non-www" to the "www") you connected.
For example, imagine you own example.com and want to connect this domain to HubSpot. First, you need to connect a subdomain, like www.example.com, to HubSpot through the Domain Manager. Then, you can set up a 301 redirect that will send visitors from your root domain, example.com, to www.example.com. If your DNS provider does not provide a 301 redirect, please reach out to our Support team and they can help you with a solution.