mail.ergovia.de has no NS records.
NS records for this zone are defined at ergovia.de.
NS records for this zone are defined at ergovia.de.
Question and response
Question
dig mail.ergovia.de. NS
Answer
The response has no answer records.
Authority
ergovia.de. 300 SOA ns1044.ui-dns.org. hostmaster.schlund.de. 2017052975 28800 7200 604800 300
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0