mx4.sgict.gov.sg has no CNAME records.
Question and response
Question
dig mx4.sgict.gov.sg. NS
Answer
The response has no answer records.
Authority
sgict.gov.sg. 900 SOA gccin3psicnsp01.sgnet.gov.sg. root.pridns.gov.sg. 2014092688 10800 1080 2419200 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0