grat1.truehost.cloud has no MX records.
Question and response
Question
dig grat1.truehost.cloud. MX
Answer
The response has no answer records.
Authority
truehost.cloud. 1800 SOA hugh.ns.cloudflare.com. dns.cloudflare.com. 2397107735 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0