scs-ns.org has no MX records.
Question and response
Question
dig scs-ns.org. MX
Answer
The response has no answer records.
Authority
scs-ns.org. 600 SOA ns3.scs-ns.org. admin\.dns.swisscom.com. 3532 21600 3600 604800 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0