cm.net.sap has no MX records.
Question and response
Question
dig cm.net.sap. MX
Answer
The response has no answer records.
Authority
cm.net.sap. 7200 SOA ns1.sap.net. dns.sap-ag.de. 1765449739 3530 600 3600000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0