dyn.netcompartner.com has no MX records.
Question and response
Question
dig dyn.netcompartner.com. MX
Answer
The response has no answer records.
Authority
dyn.netcompartner.com. 300 SOA s2.netcompartner.com. hostmaster.netcompartner.com. 1 10800 3600 604800 38400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0