mx.hostpoint.ch has no NS records.
NS records for this zone are defined at hostpoint.ch.
NS records for this zone are defined at hostpoint.ch.
Question and response
Question
dig mx.hostpoint.ch. NS
Answer
The response has no answer records.
Authority
hostpoint.ch. 60 SOA ns.hostpoint.ch. hostmaster.hostpoint.ch. 1771459200 14400 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0