mail.easy-feedback.de has no CNAME records.
Question and response
Question
dig mail.easy-feedback.de. NS
Answer
The response has no answer records.
Authority
easy-feedback.de. 130 SOA ns1.first-ns.de. dns.hetzner.com. 2026022701 300 300 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0