fm1._domainkey.hojmark.dk has no MX records.
Question and response
Question
dig fm1-2691-hojmark-dk.fmdkim.net. MX
Answer
The response has no answer records.
Authority
fmdkim.net. 300 SOA ns1.flowmailer.net. contact.flowmailer.net. 2603100628 300 600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0