Question and response
Question
dig spf.mailcore.net. TXT
Answer
spf.mailcore.net. 3600 TXT "v=spf1 ip4:194.19.134.0/25 ip4:185.138.56.128/25 -all"
Authority
mailcore.net. 3600 NS pns23.cloudns.net.
mailcore.net. 3600 NS pns24.cloudns.net.
mailcore.net. 3600 NS pns21.cloudns.net.
mailcore.net. 3600 NS pns22.cloudns.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0