ns3.iplanet.ec has no MX records.
Question and response
Question
dig ns3.iplanet.ec. MX
Answer
The response has no answer records.
Authority
iplanet.ec. 7200 SOA iplanet.ec. root.iplanet.ec. 2021082384 10800 900 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0