Question and response
Question
dig spf.tetra.in. TXT
Answer
spf.tetra.in. 600 TXT "v=spf1 a:server-relay-1.tetra.in ~all"
Authority
tetra.in. 3600 NS ns38.domaincontrol.com.
tetra.in. 3600 NS ns37.domaincontrol.com.
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0