ns3.interplanet.com.mx has no MX records.
Question and response
Question
dig ns3.interplanet.com.mx. MX
Answer
The response has no answer records.
Authority
interplanet.com.mx. 3600 SOA ns1.mysecurecloudhost.com. servers.mysecurecloudhost.com. 2025071601 3600 3600 3600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0