cobain2.simlab.net has no MX records.
Question and response
Question
dig cobain2.simlab.net. MX
Answer
The response has no answer records.
Authority
simlab.net. 14400 SOA ns1.megapath.com. support.megapath.com. 1734984407 7200 300 604800 14400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0