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 && make install The install script will enter an interactive stage with questions in the form of '*_directory:[default]input'. Defaults can be accepted in all but three cases. The following shows the three cases and the modified response. daemon_directory:[/usr/libexec/postfix]/usr/sbin manpage_directory:[/usr/local/man]/usr/share/man sample_directory:[/etc/postfix]/usr/share/doc/postfix The final installation step is to install the program's documentation with this command: cp -rf html/* /usr/share/doc/postfix