ns3.simnet.is has no MX records.
Question and response
Question
dig ns3.simnet.is. MX
Answer
The response has no answer records.
Authority
simnet.is. 3600 SOA ns1.simnet.is. hostmaster.simnet.is. 2026021905 28800 7200 1555200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0