mail.nerfed.net has no MX records.
Question and response
Question
dig mail.nerfed.net. MX
Answer
The response has no answer records.
Authority
nerfed.net. 1800 SOA barbara.ns.cloudflare.com. dns.cloudflare.com. 2398023602 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0