mx.mansfieldrealestateagent.com has no MX records.
Question and response
Question
dig mx.mansfieldrealestateagent.com. MX
Answer
The response has no answer records.
Authority
mansfieldrealestateagent.com. 3600 SOA dns.mansfieldrealestateagent.com. hostmaster.mansfieldrealestateagent.com. 1897121666 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0