vmmsx.netsolmail.com has no NS records.
NS records for this zone are defined at netsolmail.com.
NS records for this zone are defined at netsolmail.com.
Question and response
Question
dig vmmsx.netsolmail.com. NS
Answer
The response has no answer records.
Authority
netsolmail.com. 1800 SOA heidi.ns.cloudflare.com. dns.cloudflare.com. 2398293170 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0