hosting.nerdie.net has no MX records.
Question and response
Question
dig hosting.nerdie.net. MX
Answer
The response has no answer records.
Authority
nerdie.net. 1800 SOA lucy.ns.cloudflare.com. dns.cloudflare.com. 2396883165 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0