backup300prox.afrihost.com has no MX records.
Question and response
Question
dig backup300prox.afrihost.com. MX
Answer
The response has no answer records.
Authority
afrihost.com. 1800 SOA edna.ns.cloudflare.com. dns.cloudflare.com. 2395781089 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0