mra.hughes.com has no MX records.
Question and response
Question
dig mra.hughes.com. MX
Answer
The response has no answer records.
Authority
hughes.com. 1800 SOA ns1.hns.com. no_email.hughes.com. 1395 86400 14400 432000 302400
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0