dns3.cableworld.tv has no MX records.
Question and response
Question
dig dns3.cableworld.tv. MX
Answer
The response has no answer records.
Authority
cableworld.tv. 86400 SOA ns1.registrodns.com. info.banthar.net. 2026022202 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0