nstelecablecr.com has no MX records.
Question and response
Question
dig nstelecablecr.com. MX
Answer
The response has no answer records.
Authority
nstelecablecr.com. 300 SOA ns1.nstelecablecr.com. postmaster.telecablecr.com. 2016090513 10800 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0