Your hosts file is still slightly wrong, this line
Code:
10.0.0.175 zimbra.peperzaken.nl
should be like this
Code:
10.0.0.175 zimbra.peperzaken.nl zimbra
The results from your DNS are incorrect, they should point to the LAN IP of your Zimbra server, you seem to get conflicting results from the 'host `hostname`' command and the dig output. Does the output of this command:
Code:
cat /etc/resolv.conf
give you the IP of your LAN server only?