It's somewhat difficult to comment as you've not provided the contents of your /etc/hosts file. Please post the output of the following:
Code:
cat /etc/hosts
cat/etc/resolv/conf
dig yourdomain.com any
dig yourdomain.com mx
host `hostname` <-- type that command exactly and us ebackticks not single quotes
Then read the
Quick Start Installation Guide then
this documentation, I assume that's the version you're running?