It is perfect.  There are no typos and the grammar is perfect.

A real joy after struggling with trying to get proftpd and vhcs set up.

Now I actually have a completely working server with postfix, ftp, etc.

The only thing that would have made this perfect is if you had continued with the installation of ISPConfig.  I am a little nervous now because I have to follow ISPConfig's documentation, which I know won't be as good as yours.  Good job!!