hrdns.info has no MX records.
Question and response
Question
dig hrdns.info. MX
Answer
The response has no answer records.
Authority
hrdns.info. 300 SOA ns1.name.com. hostmaster.nsone.net. 1652913370 7200 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0