webmail2.net-rosas.com.br has no NS records.
NS records for this zone are defined at net-rosas.com.br.
NS records for this zone are defined at net-rosas.com.br.
Question and response
Question
dig webmail2.net-rosas.com.br. NS
Answer
The response has no answer records.
Authority
net-rosas.com.br. 1800 SOA net-rosas.com.br. root.net-rosas.com.br. 2017053306 36000 900 604800 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0