I am running ISPCONFIG with Fedora Core 5. It's been running flawlessly for over a year now. All of a sudden I can't send or receive any mail. When I reboot the server it takes an extremely long time to come up to the login screen. On a side note. I can reload everything from backups, reboot and it works great for a couple of days and then it becomes unstable again. Any help would be greatly appreciated.