you will need to check if you have a valid rDNS set and DKIM signed emails.
Simple rDNS Checker (PTR records)
resolves to:
i.root-servers.net.
k.root-servers.net.
h.root-servers.net.
f.root-servers.net.
e.root-servers.net.
c.root-servers.net.
g.root-servers.net.
l.root-servers.net.
m.root-servers.net.
b.root-servers.net.
j.root-servers.net.
a.root-servers.net.
d.root-servers.net.
DKIM & SPF Manager
File /etc/opendkim/TrustedHosts don't exists!
File /etc/opendkim/KeyTable don't exists!
File /var/named/JO.NS.CLOUDFLARE.COM.db don't exists!
File /var/named/JO.NS.CLOUDFLARE.COM.db don't exists!
What to do next?