mail.waugi.cloud has no CNAME records.
Question and response
Question
dig mail.waugi.cloud. NS
Answer
The response has no answer records.
Authority
waugi.cloud. 1428 SOA celeste.ns.cloudflare.com. dns.cloudflare.com. 2396658129 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0