DNS is usually plain, your ISP can read what sites you visit.

Is there any benefit you using this if you're not paranoid your current DNS provider is tracking you (or you don't care if they do)?

that is why when you change IP in cloudflare dns for account not migrated it shows invalid SSL cert (same as my case). Wait for entire migration to complete and then check if its still giving ssl cer

* Reverse DNS Management

Ooops typo. Anyone using our dns servers is fine.

point there for now.. I'm using cloudflare for DNS

The email reads "If you're pointing your domains to your DNS servers, no action should be needed."

You need to create it in the DNS zone where you have it hosted (cPanel or even Cloudflare) and after that you need to go to your registrar and put that record there.

How should the DNSSEC be set?

2) Linode provides Slave DNS service, whereas Vultr doesn't. I'm using he.net for free slave DNS now.

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74.48.84.247 ,but I don't buy any dns record for my ip to use.

Just set your DNS records correctly, even the DNSSEC one.

The error message from the first post "Domain Lookup Failed" the error is more likely a DNS issue, do you use dnssec on the domain and if so is it setup correctly.

You could test trial 14 days google workspace and set MX DNS on subdomain and see mail was sended on inbox or not.

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582.50 Mbit/s 84.146 ms Germany, Berlin (DNS:NET) 158.17 Mbit/s 439.64 Mbit/s 109.053 ms Spain, Madrid (MasMovil) 183.69 Mbit/s 489.43 Mbit/s 98.132 ms Italy, Rome (Unidata)

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Does Bunny support IPv6 for DNS yet? They didn't when I last checked.