...so I started with Yellow Dog in 2000. Then progressed through Red Hat, CentOS, Suse, Fedora, Slackware, Ubuntu and Gentoo. Now have a "tools for the job" relationship with Ubuntu, CentOS and OS X. (Work uses RHEL and CentOS).
Sendmail may be safely run set-user-id to root. -- Eric Allman, "Sendmail Installation Guide"