Question and response
Question
dig spf.mxthunder.com. DS
Answer
spf.mxthunder.com. 900 CNAME mxthunder.com.
Authority
mxthunder.com. 172800 SOA ns.dnsbox.net. hostmaster.dnsbox.net. 2026021706 10000 3600 604800 172800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0