rackhostmx.com has no MX records.
Question and response
Question
dig rackhostmx.com. MX
Answer
The response has no answer records.
Authority
rackhostmx.com. 3600 SOA ns1.dns24.hu. hostmaster.dns24.hu. 2025111000 86400 7200 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0