dnspri.singnet.com.sg has no MX records.
Question and response
Question
dig dnspri.singnet.com.sg. MX
Answer
The response has no answer records.
Authority
singnet.com.sg. 3600 SOA dnspri.singnet.com.sg. hostmaster.singnet.com.sg. 2025081521 3600 1200 2419200 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0