mails.bp2contato.com.br has no NS records.
NS records for this zone are defined at bp2contato.com.br.
NS records for this zone are defined at bp2contato.com.br.
Question and response
Question
dig mails.bp2contato.com.br. NS
Answer
The response has no answer records.
Authority
bp2contato.com.br. 1800 SOA kim.ns.cloudflare.com. dns.cloudflare.com. 2397606388 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0