Almost there... but not quite yet..
I get stuck at this:
System check report:
Environment check passed.
Filesystem check passed.
Network check failed -- Could not find a host name in DNS that matches an IP address
Network check failed -- IP address '192.168.1.213' associated with host name 'XXX.XXX.eu' in DNS cannot be confirmed as this host's IP address
When I check the IP address of eth0 it is correctly 192.168.1.213 and I did put in the mail server hostname using this:
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
And the response from DNS in my firewall correctly gives the DNS reponse back on "XXX.XXX.eu" if I do a nslookup.
It all looks fine