mx.iriswinery.com has no NS records.
NS records for this zone are defined at iriswinery.com.
NS records for this zone are defined at iriswinery.com.
Question and response
Question
dig mx.iriswinery.com. NS
Answer
The response has no answer records.
Authority
iriswinery.com. 3600 SOA dns.iriswinery.com. hostmaster.iriswinery.com. 1609782818 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0