_spf.zenbox.pl has no NS records.
NS records for this zone are defined at zenbox.pl.
NS records for this zone are defined at zenbox.pl.
Question and response
Question
dig _spf.zenbox.pl. NS
Answer
The response has no answer records.
Authority
zenbox.pl. 600 SOA ns1.zenbox.pl. hostmaster.zenbox.pl. 2026012800 600 3600 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0