spf.postal2.fbr.group has no NS records.
NS records for this zone are defined at fbr.group.
NS records for this zone are defined at fbr.group.
Question and response
Question
dig spf.postal2.fbr.group. NS
Answer
The response has no answer records.
Authority
fbr.group. 86287 SOA ns10.servicio-online.net. hostmaster.ns10.servicio-online.net. 1774739932 14400 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0