inbox.mellowooddesigns.com has no CNAME records.
Question and response
Question
dig inbox.mellowooddesigns.com. NS
Answer
The response has no answer records.
Authority
mellowooddesigns.com. 1609 SOA dns.mellowooddesigns.com. hostmaster.mellowooddesigns.com. 1447120453 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0