mail.selbstdenker.com has no NS records.
NS records for this zone are defined at selbstdenker.com.
NS records for this zone are defined at selbstdenker.com.
Question and response
Question
dig mail.selbstdenker.com. NS
Answer
The response has no answer records.
Authority
selbstdenker.com. 300 SOA anycast.regdns1.de. root.netzblick.de. 2026030601 10800 3600 604800 300
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0