mx.travelsoft.fr has no NS records.
NS records for this zone are defined at travelsoft.fr.
NS records for this zone are defined at travelsoft.fr.
Question and response
Question
dig mx.travelsoft.fr. NS
Answer
The response has no answer records.
Authority
travelsoft.fr. 1800 SOA asa.ns.cloudflare.com. dns.cloudflare.com. 2398421980 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0