dns3.hbidc.net has no MX records.
Question and response
Question
dig dns3.hbidc.net. MX
Answer
The response has no answer records.
Authority
hbidc.net. 600 SOA dns.bizcn.com. abuse.bizcn.com. 7 28800 14400 14400 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0