lfpgr9.static.netgroup.dk has no MX records.
Question and response
Question
dig lfpgr9.static.netgroup.dk. MX
Answer
The response has no answer records.
Authority
static.netgroup.dk. 86400 SOA authns1.ngdc.net. hostmaster.ngdc.net. 2016091000 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0