ns2.lumos.net has no MX records.
Question and response
Question
dig ns2.lumos.net. MX
Answer
The response has no answer records.
Authority
lumos.net. 3600 SOA ns1.lumos.net. dns.ntelos.net. 2025062400 43200 3600 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0