www.twcsc.com has no MX records.
Question and response
Question
dig www.twcsc.com. MX
Answer
The response has no answer records.
Authority
twcsc.com. 14400 SOA ns1.twcable.com. hostmaster.ns1.twcable.com. 2025032604 10800 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0