ca-smtp.ragingwire.com has no CNAME records.
Question and response
Question
dig ca-smtp.ragingwire.com. NS
Answer
The response has no answer records.
Authority
ragingwire.com. 34 SOA ns1.ragingwire.com. dnsadmin.ragingwire.com. 2026021800 3600 1800 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0