mm.hge.net has no MX records.
Question and response
Question
dig mm.hge.net. MX
Answer
The response has no answer records.
Authority
hge.net. 300 SOA auth1.america.net. dns.america.net. 2026012001 3600 600 864000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0