smtp01.srv.celeste.fr has no NS records.
NS records for this zone are defined at srv.celeste.fr.
NS records for this zone are defined at srv.celeste.fr.
Question and response
Question
dig smtp01.srv.celeste.fr. NS
Answer
The response has no answer records.
Authority
srv.celeste.fr. 3600 SOA ns1.celeste.fr.srv.celeste.fr. support.celeste.fr. 2025051201 3600 900 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0