plk110l.sectorshared.net has no MX records.
Question and response
Question
dig plk110l.sectorshared.net. MX
Answer
The response has no answer records.
Authority
sectorshared.net. 1800 SOA dolly.ns.cloudflare.com. dns.cloudflare.com. 2397949457 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0