ns2.safedc.net has no MX records.
Question and response
Question
dig ns2.safedc.net. MX
Answer
The response has no answer records.
Authority
safedc.net. 600 SOA ns0.safedc.net. hostmaster.safespring.com. 1772348106 7200 3600 864000 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0