hesiaws.com has no MX records.
Question and response
Question
dig hesiaws.com. MX
Answer
The response has no answer records.
Authority
hesiaws.com. 900 SOA ns1.reedelsevier.com. hostmaster.lexisnexis.com. 57 3600 900 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0