ns.nic.se has no MX records.
Question and response
Question
dig ns.nic.se. MX
Answer
The response has no answer records.
Authority
nic.se. 600 SOA ns.nic.se. hostmaster.nic.se. 1772458147 14400 3600 2592000 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0