dumathoin.cwshs.com has no MX records.
Question and response
Question
dig dumathoin.cwshs.com. MX
Answer
The response has no answer records.
Authority
cwshs.com. 600 SOA ns.cgi.com. dnsops\.gto.cgi.com. 789868939 1200 180 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0