in-addr.dgcsystems.net has no MX records.
Question and response
Question
dig in-addr.dgcsystems.net. MX
Answer
The response has no answer records.
Authority
in-addr.dgcsystems.net. 3600 SOA ns1.dgcsystems.net. registry.dgc.se. 2003109245 86400 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0