relay3.mymailcheap.com has no CNAME records.
Question and response
Question
dig relay3.mymailcheap.com. NS
Answer
The response has no answer records.
Authority
mymailcheap.com. 3026 SOA dns31.cloudns.net. support.cloudns.net. 2026022008 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0