mail.gunnarhofmann.de has no NS records.
NS records for this zone are defined at gunnarhofmann.de.
NS records for this zone are defined at gunnarhofmann.de.
Question and response
Question
dig mail.gunnarhofmann.de. NS
Answer
The response has no answer records.
Authority
gunnarhofmann.de. 86400 SOA ns.gunnarhofmann.de. hostmaster.gunnarhofmann.de. 23 86400 28800 2419200 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0