Question and response
Question
dig mx.mailfiltering.com. NSEC
Answer
The response has no answer records.
Authority
mailfiltering.com. 300 SOA dns1.vps.net. root.mailfiltering.com. 2025111802 7200 600 1728000 300
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0