Hi! I use ISPconfig 2.2.14 for some weeks. The hostname of my server is something like Code: # hostname static.<IP>.clients.your-server.de This is the name of the server given by my ISP Hetzner. There are some .de and .com-domains an this server and everything works great. Only emails from postfix itself (like sender not found etc) are a little bit ugly: Code: This is the Postfix program at host static.<ip>.clients.your-server.de. I'm sorry to have to inform you that your message I think postfix gets its name from hostname. Can i change it to something like somedomain.de? I tried changing main.cf this way: Code: myhostname = mail.somedomain.de But this results in looping emails: Code: relay=none, delay=0, status=bounced (mail for mail.somedomain.de loops back to myself) I guess it's because somedomain.de is already an virtual domain on this server. Any ideas how to change the hostname?