Hi there,
onCloud flare the MX points to G Suite and also mail.domain.com is pointing to our CWP IP address. We also have the G Suite DKIM and SPF records set up. As we dont use hte local mail for anything but sending system message and submition to ourself from different websites this is what the rDNS is showing
Your rDNS for IP "I.P. h.e.r.e" is set as following:
resolves to:
l.root-servers.net.
j.root-servers.net.
b.root-servers.net.
e.root-servers.net.
m.root-servers.net.
a.root-servers.net.
h.root-servers.net.
k.root-servers.net.
i.root-servers.net.
g.root-servers.net.
c.root-servers.net.
f.root-servers.net.
d.root-servers.net.