mail1.daviddeangelo.com has no CNAME records.
Question and response
Question
dig mail1.daviddeangelo.com. NS
Answer
The response has no answer records.
Authority
daviddeangelo.com. 600 SOA ns43.domaincontrol.com. dns.jomax.net. 2023050900 28800 7200 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0