rci.rcimx.net has no MX records.
Question and response
Question
dig rci.rcimx.net. MX
Answer
The response has no answer records.
Authority
rci.rcimx.net. 300 SOA eden.redcondor.net. hostmaster.redcondor.net. 1554940545 1800 180 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0