orinoco.impsat.net.co has no MX records.
Question and response
Question
dig orinoco.impsat.net.co. MX
Answer
The response has no answer records.
Authority
impsat.net.co. 21600 SOA ns1.impsat.net.co. hostmaster.impsat.net.ar. 2230426014 10800 3600 604800 21600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0