mx.lecoindesenfants.com has no NS records.
NS records for this zone are defined at lecoindesenfants.com.
NS records for this zone are defined at lecoindesenfants.com.
Question and response
Question
dig mx.lecoindesenfants.com. NS
Answer
The response has no answer records.
Authority
lecoindesenfants.com. 3600 SOA dns.lecoindesenfants.com. hostmaster.lecoindesenfants.com. 1566578942 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0