exmbx01.ex5.goinet.net has no MX records.
Question and response
Question
dig exmbx01.ex5.goinet.net. MX
Answer
The response has no answer records.
Authority
goinet.net. 7200 SOA ns1.ashcom.net. postmaster.ashcom.net. 2026012901 3600 1800 1800000 7200
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0