Hi howto'ers, Firstly thanks for passing on your knowledge in these guides. I have a couple of questions if any one has some time. I followed the howto for a perfect Fedora core 4 install with ispconfig. All went well and i'm left with a nice system. With the hostname part I didn't have a registered domain spare at the time so I made up mars.servery.com. Then I noticed that the system is trying to send mail to email@example.com... not too good. So my question is two parts,what should I use as the hostname if I don't have a registered domain? Also I read on aboutdebian.com that you shouldn't use your domain as the hostname because it is a security risk. Therefore if I register a domain,for example mydomain.com,what should I set the hostname to? I do intend it to be publically available in a non production sense once the domain is registered. One last question if I may,which Fedora dist is best for this job, the latest 6 or is better to stick with 4? Thanks for anyones help. I am grateful.