ns4.gdmnet.se has no MX records.
Question and response
Question
dig ns4.gdmnet.se. MX
Answer
The response has no answer records.
Authority
gdmnet.se. 3600 SOA ns3.gdmnet.se. kommunikation.gdm.se. 1359720017 14400 3600 604800 38400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0