Ok, thank you for your article, but can you tell me:

1. why don't you use the default email server from tasksel or from the ubuntu server guide?

https://help.ubuntu.com/8.04/serverguide/C/email-services.html

Why are you using courier and cyrus-sasl2 instead dovecot?

2.  why you're disable the apparmour and enable root account but you use bind chrooted?

3. why don't you just select lamp server at install and go for the suplimentary needed packages later?

It seems to me that this is not the "perfect ubuntu server", but a platform for ispconfig.