ns3.megapath.com has no MX records.
Question and response
Question
dig ns3.megapath.com. MX
Answer
The response has no answer records.
Authority
megapath.com. 300 SOA ns1.megapath.com. support.megapath.com. 1753889482 14400 3600 2718281828 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0