bucks-smtp2.binarywizard.info has no CNAME records.
Question and response
Question
dig bucks-smtp2.binarywizard.info. NS
Answer
The response has no answer records.
Authority
binarywizard.info. 1773 SOA apollo.ns.cloudflare.com. dns.cloudflare.com. 2396108104 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0