ns501.hostingrd.com has no MX records.
Question and response
Question
dig ns501.hostingrd.com. MX
Answer
The response has no answer records.
Authority
ns501.hostingrd.com. 600 SOA ns1.verification-hold.suspended-domain.com. admin.suspended-domain.com. 2012022012 7200 7200 172800 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0