Trouble installing Postfix on 10.2.6 server

I have followed the (AFP548.com) instructions but during the make install process I got an error. One of the question ask me for specifying a group for mail submission and for queue management commands. At first I just hit the return key but got an error at the end about having to specify a group. I thought I would put maildrop instead since I had to create an group called maildrop before the install but still gave me an error. It requires me to put in an dedicated group ID. Used the maildrop group ID but still no luck. Any ideas??