Question and response
Question
dig mail.smtp48.com. NSEC
Answer
The response has no answer records.
Authority
smtp48.com. 1800 SOA amy.ns.cloudflare.com. dns.cloudflare.com. 2396545288 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0