lb1.ubivox.dk has no MX records.
Question and response
Question
dig lb1.ubivox.dk. MX
Answer
The response has no answer records.
Authority
ubivox.dk. 300 SOA ns1.ubivox.org. hostmaster.ubivox.org. 2026022601 7200 1800 1209600 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0