mail.ilkdns.de has no CNAME records.
Question and response
Question
dig mail.ilkdns.de. NS
Answer
The response has no answer records.
Authority
ilkdns.de. 3507 SOA ns.pop-hannover.de. hostmaster.net.de. 2024022001 21600 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0