~ dig NS normail.co @ns1.cctld.co.
;; ADDITIONAL SECTION: ns1.box.normail.co. 3600 IN A 178.62.214.105 ns2.box.normail.co. 3600 IN A 178.62.214.105
ns1.cctld.co. is the registry server for the ".co" domain tld. Everyone has access to the glue records. It's how DNS works. They are not secure by any definition. You can also see for yourself at https://www.ultratools.com/tools/dnsLookup (in the Trace tab after you lookup)
And your only MX record:
normail.co. 3600 IN MX 10 box.normail.co.
I'm honestly surprised you even have DNSSEC setup. That one hugely surprised me.
And the host of 178.62.214.105? A single Digital Ocean VPS in Amsterdam.
inetnum: 178.62.128.0 - 178.62.255.255 netname: DIGITALOCEAN-AMS-5 descr: DigitalOcean Amsterdam
I'll accept that you're unaware of how the internet or cybersecurity works besides a primitive level as an explanation for the incoherent technobabble in your comment.
I say this in the absolutely nicest way possible: please don't run a service where others rely on you when you know you are not capable of running a reliable service. There is a point where incompetency becomes malicious.