smtp2.sfrbusinessteam.fr has no NS records.
NS records for this zone are defined at sfrbusinessteam.fr.
NS records for this zone are defined at sfrbusinessteam.fr.
Question and response
Question
dig smtp2.sfrbusinessteam.fr. NS
Answer
The response has no answer records.
Authority
sfrbusinessteam.fr. 3600 SOA ns1.sfrbusinessteam.fr. admin.9services.com. 2014102606 3600 3600 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0