mail8.mymailcheap.com has no CNAME records.
Question and response
Question
dig mail8.mymailcheap.com. NS
Answer
The response has no answer records.
Authority
mymailcheap.com. 3600 SOA dns31.cloudns.net. support.cloudns.net. 2026030601 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0