mbacgroup.entregaemail.com has no NS records.
NS records for this zone are defined at entregaemail.com.
NS records for this zone are defined at entregaemail.com.
Question and response
Question
dig mbacgroup.entregaemail.com. NS
Answer
The response has no answer records.
Authority
entregaemail.com. 1800 SOA kim.ns.cloudflare.com. dns.cloudflare.com. 2398296022 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0