I trying to clear up all the warnings on my server. I get the following on my email server Reverse DNS does not match SMTP Banner How do I fix this
Set the reverse dns name to match your server's hostname (preferred), or force the use of a specific hostname in smtp greeting to match your reverse dns name.
So just to be sure im asking them to create an rDNS record martin.gregson.me.uk and point it to my email server IP address