winmail2.winserversecure.com has no NS records.
NS records for this zone are defined at winserversecure.com.
NS records for this zone are defined at winserversecure.com.
Question and response
Question
dig winmail2.winserversecure.com. NS
Answer
The response has no answer records.
Authority
winserversecure.com. 1800 SOA jerome.ns.cloudflare.com. dns.cloudflare.com. 2398741330 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0