mail3.mfocus.com.my has no CNAME records.
Question and response
Question
dig mail3.mfocus.com.my. NS
Answer
The response has no answer records.
Authority
mfocus.com.my. 7901 SOA ns1.webranet.com.my. jerry.mfocus.com.my. 2000052499 7200 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0