I need to install Postfix on a fresh Ubuntu box on first boot, but the interactive configuration screen that the installer presents to you isn't scriptable. When my startup script attempts the following:
apt-get -y install postfix
the init script hangs. If I run it by hand, I'm presented with a "dialog" screen from the whiptail command.
Is there a way for me to force a particular option from the command-line, or tell the Postfix installer that I don't want it to give me any configuration at all? I'm generating my own main.cf file anyway, and don't need Ubuntu's helper screen.