xlhdns.com has no MX records.
Question and response
Question
dig xlhdns.com. MX
Answer
The response has no answer records.
Authority
xlhdns.com. 3600 SOA localhost. support.xlhost.com. 1 10380 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0