Before you compile the program, you need to create users and groups that will be expected to be in place when the install script executes. Add the users and groups with the following commands: groupadd postfix && groupadd postdrop && groupadd -g 65534 nogroup && useradd -c postfix -d /dev/null -g postfix -s /bin/false postfix && useradd -c nobody -d /home -g nogroup -s /bin/bash -u 65534 nobody && chown postfix:postfix /var/mail Install postfix by running the following commands: make && sh postfix-install daemon_directory=/usr/sbin \ manpage_directory=/usr/share/man \ sample_directory=/usr/share/doc/postfix \ -non-interactive The final installation step is to install the program's documentation with this command: install -d /usr/share/doc/postfix && cp -rf html/* /usr/share/doc/postfix