info.xlhost.com has no MX records.
Question and response
Question
dig group3.sites.hscoscdn00.net. MX
Answer
The response has no answer records.
Authority
hscoscdn00.net. 1800 SOA jerry.ns.cloudflare.com. dns.cloudflare.com. 2397440551 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0