mail.xservers.ro has no NS records.
NS records for this zone are defined at xservers.ro.
NS records for this zone are defined at xservers.ro.
Question and response
Question
dig mail.xservers.ro. NS
Answer
The response has no answer records.
Authority
xservers.ro. 1800 SOA norman.ns.cloudflare.com. dns.cloudflare.com. 2395280572 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0