mail.netvay.com has no NS records.
NS records for this zone are defined at netvay.com.
NS records for this zone are defined at netvay.com.
Question and response
Question
dig mail.netvay.com. NS
Answer
The response has no answer records.
Authority
netvay.com. 1800 SOA cris.ns.cloudflare.com. dns.cloudflare.com. 2399251169 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0