Preface

Contents:
Specific
Conventions

Specific

The sendmail program is a Mail Transport Agent (MTA). It accepts mail from Mail User Agents (MUAs), mail users (humans), and other MTAs. It then delivers that mail to Mail Delivery Agents (MDAs) on the local machine, or transports that mail to another MTA at another machine. The behavior of sendmail is determined by its command line and by commands in its configuration file.

The sendmail program is written and maintained by Eric Allman at sendmail.org. Versions V8.7 and earlier are no longer supported and are no longer considered secure. If you are not currently running V8.8, we recommend you upgrade now. This Desktop Reference covers sendmail version 8.8.5.

This Desktop Reference is a companion to the second version of the sendmail tutorial by Bryan Costales with Eric Allman, published by Anonymous. Section numbers herein reference the section numbers in that tutorial. This is a reference guide only - for detail or tutorial information, refer to the full sendmail tutorial.