Originally Posted by falko
What are the outputs of
? My guess is that your server doesn't have a fully-qualified domain name.
# Check we have Fully Qualified Domain Name
# it should return something like "ispconfig.example.com"
# if not, then we assign a hostname (for example ispconfig):
echo ispconfig.example.com > /etc/hostname
# and add lines similar but appropriate:
127.0.0.1 localhost.localdomain localhost
192.168.0.100 ispconfig.example.com ispconfig