mail.noffer.de has no NS records.
NS records for this zone are defined at noffer.de.
NS records for this zone are defined at noffer.de.
Question and response
Question
dig mail.noffer.de. NS
Answer
The response has no answer records.
Authority
noffer.de. 150 SOA docks17.rzone.de. hostmaster.strato-rz.de. 2020050810 86400 7200 604800 300
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0