auth5.dns.datapointinc.net has no MX records.
Question and response
Question
dig auth5.dns.datapointinc.net. MX
Answer
The response has no answer records.
Authority
auth5.dns.datapointinc.net. 3600 SOA auth1.dns.expedient.com. hostmaster.expedient.com. 2010043001 3600 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0