mx.elschneider.net has no NS records.
NS records for this zone are defined at elschneider.net.
NS records for this zone are defined at elschneider.net.
Question and response
Question
dig mx.elschneider.net. NS
Answer
The response has no answer records.
Authority
elschneider.net. 3600 SOA dns.elschneider.net. hostmaster.elschneider.net. 1447756355 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0