During 2000-2006 I maintained (and hacked) Sendmail at a large Internet hosting company, where I fielded numerous questions from internal support staff. To avoid answering the same questions repeatedly, I drafted some documents and posted them anonymously at a new web site I called Technoids.org. I released that domain name several years ago. However, the Sendmail documents are still available at weldon.whipple.org

This Tech Notes sub-site is now mainly for my own benefit. I hope it helps you as well