ncnoc.ncren.net has no MX records.
Question and response
Question
dig ncnoc.ncren.net. MX
Answer
The response has no answer records.
Authority
ncren.net. 14400 SOA ns-01.mcnc.org. hostmaster.ncren.net. 2026022501 14400 7200 1209600 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0