ns1.redwing.net has no MX records.
Question and response
Question
dig ns1.redwing.net. MX
Answer
The response has no answer records.
Authority
redwing.net. 3600 SOA ns1.bevcomm.net. empty.empty. 1005 3600 600 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0