email.doppiozero.to has no CNAME records.
Question and response
Question
dig email.doppiozero.to. NS
Answer
The response has no answer records.
Authority
doppiozero.to. 60 SOA ns1.systemdns.com. hostmaster.systemdns.com. 1771843556 10800 3600 1209600 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0