Sendmail Consortium -  .

Elandsys.com: Sendmail - - Features a tutorial on how to install and configure it.

Explosion in a Punctuation Factory - - Excellent tutorial on how sendmail's rewriting rules work. Written by Brian Costales, the author of the best sendmail book around, "Sendmail", published by O'Reilly and Associates.

A First Guide for E-mail Installation - - A draft about the installation/configuration of sendmail.

HP-UX Mailing Services Administrator's Guide - - HP-UX sendmail documentation. Also applicable to sendmail in general.

Jeremy Mates’s sendmail pages - - Sendmail flow diagram with explanations and example configuration files for various situations.

Linux-Sec.net - - Features minimum mail server hardening recommendations. Includes information on how to do it, antispam, filtering, open relay, antivirus, and statistics analyzer.

MeTA1 - - MeTA1 is a successor of Sendmail X. Release notes, documentation, source code and contact information.

Sendmail FAQ - - Frequently asked questions about sendmail.

Sendmail Inc. - - Commercial Sendmail products and services.

Sendmail Routing with LDAP - - Step-by-step instructions on using sendmail's LDAP routing feature. [Sun support contract required.

Sendmail: Theory and Practice - - Homepage for the sedmail book by Paul A. Vixie and Frederick M. Avolio. Errata, sample chapter and ordering information.

Sendmail V8: A (Smoother) Engine Powers Network E-mail - - Article on sendmail version 8 features. Mostly of historical value.

Tek-Tips Sendmail Forum - - Technical support forums and mutual help system for computer professionals. Selling and recruiting forbidden.