mail.krpservers.com has no CNAME records.
Question and response
Question
dig mail.krpservers.com. NS
Answer
The response has no answer records.
Authority
krpservers.com. 5648 SOA ns0.krpservers.com. root.krpservers.com. 2025101601 10800 3600 1600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0