hostmaster.conwaycorp.net has no MX records.
Question and response
Question
dig hostmaster.conwaycorp.net. MX
Answer
The response has no answer records.
Authority
conwaycorp.net. 2560 SOA ns.conwaycorp.net. hostmaster.conwaycorp.net. 1769541783 16384 2048 1048576 2560
Additional
The response has no additional records.