spf1.groupeot.com has no NS records.
NS records for this zone are defined at groupeot.com.
NS records for this zone are defined at groupeot.com.
Question and response
Question
dig spf1.groupeot.com. NS
Answer
The response has no answer records.
Authority
groupeot.com. 3600 SOA ns1.celhost.eu. hostmaster.groupeot.com. 1773212275 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0