mail.cesmet.mil.do has no NS records.
NS records for this zone are defined at cesmet.mil.do.
NS records for this zone are defined at cesmet.mil.do.
Question and response
Question
dig mail.cesmet.mil.do. NS
Answer
The response has no answer records.
Authority
cesmet.mil.do. 1800 SOA chuck.ns.cloudflare.com. dns.cloudflare.com. 2399084942 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0