mx2.mail.vrmd.de has no NS records.
NS records for this zone are defined at vrmd.de.
NS records for this zone are defined at vrmd.de.
Question and response
Question
dig mx2.mail.vrmd.de. NS
Answer
The response has no answer records.
Authority
vrmd.de. 86400 SOA ns1.variomedia.de. support.variomedia.de. 2025121858 28800 7200 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0