smtp.gsgo.msft.net has no NS records.
NS records for this zone are defined at msft.net.
NS records for this zone are defined at msft.net.
Question and response
Question
dig smtp.gsgo.msft.net. NS
Answer
The response has no answer records.
Authority
msft.net. 300 SOA ns1-205.azure-dns.com. azuredns-hostmaster.microsoft.com. 1 3600 300 2419200 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0