Question and response
Question
dig _spf.mailer.twinfield.com. HTTPS
Answer
The response has no answer records.
Authority
twinfield.com. 1800 SOA jihoon.ns.cloudflare.com. dns.cloudflare.com. 2397080772 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0