nac.no has no MX records.
Question and response
Question
dig nac.no. MX
Answer
The response has no answer records.
Authority
nac.no. 3600 SOA biff.uninett.no. hostmaster.uninett.no. 2013050700 28800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0