deviation.unitedbyhealthcare.com has no MX records.
Question and response
Question
dig deviation.unitedbyhealthcare.com. MX
Answer
The response has no answer records.
Authority
unitedbyhealthcare.com. 3600 SOA ns1.name.com. hostmaster.nsone.net. 1741594318 43200 7200 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0