I have a static IP and I believe I assigned it properly to the server. I'm using ubuntu 9.10 server edition. auto eth0 iface eth0 inet static address xxx.xx.xxx.x - my static IP netmask xxx.xxx.xxx.xxx - subnetmask network xx.x.xx.xx - currently I have this set to what my routers dhcp starting range is broadcast xx.x.xx.xxx - currently I have this set to what my routers dhcp ending range is gateway xxx.xx.xxx.xx - I have this set to the gateway the tech wrote down for me The issue I'm having is that postfix isn't seeing internet e-mail and I think the issue is because it's listening on the router IP and not my static IP. I just want to make sure my settings are correct before moving on with troubleshooting further. So if someone could explain what network, and broadcast values should be I'd appreciate it. Edit: with the information above my website is fine when my static IP is called in the browser or via domain name. Internet connectivity works great so I'm guessing the values are correct, I just need clarification. Thanks for any input!