pop.go.net.mt has no CNAME records.
Question and response
Question
dig pop.go.net.mt. NS
Answer
The response has no answer records.
Authority
go.net.mt. 7342 SOA GODNS01.go.net.mt. dnsadmin.go.net.mt. 1487329859 1800 60 604800 38400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0