MX Record Error Fix

error

I receive this in my all domains is that an issue? how to fix that?

and top it says

" Some of your DNS only records are exposing IPs that are proxied through Cloudflare. Make sure to proxy all A, AAAA, and CNAME records pointing to proxied records to avoid exposing your origin IP. "

and another question is it ok to have multiple domains in a free account?

Thanks in Advance

You can’t. An MX record will always expose the underlying address. You could only get another address in one way or another.

Not the account is “free” but the plan on which the domain runs. And yes, you can pretty much have an unlimited number of domains on the Free plan in one account.

Thank you