otnt10.otelcoinc.com has no MX records.
Question and response
Question
dig otnt10.otelcoinc.com. MX
Answer
The response has no answer records.
Authority
otelcoinc.com. 86400 SOA otelcoinc.com. root.iland.net. 2018032201 10800 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0