ns4.totalplay.com.mx has no MX records.
Question and response
Question
dig ns4.totalplay.com.mx. MX
Answer
The response has no answer records.
Authority
totalplay.com.mx. 900 SOA ns3.totalplay.com.mx. post.totalplay.com.mx. 979 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0