trafficmanager.net has no MX records.
Question and response
Question
dig trafficmanager.net. MX
Answer
The response has no answer records.
Authority
trafficmanager.net. 30 SOA tm1.dns-tm.com. hostmaster.trafficmanager.net. 2003080800 900 300 2419200 30
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0