What Is Sendmail?

This section provides a quick introduction of Sendmail, a MTA (Mail Transfer Agent), that works other MTAs and MDAs (Mail Delivery Agents) to transfer and deliver emails.

Sendmail is a MTA (Mail Transfer Agent) program developed by Eric Allman at UCB in 1983 for UNIX systems. Sendmail was developed based on "delivemail" program, which was also developed by Eric Allman in 1979.

Some features of Sendmail are:

The picture below shows how Sendmail can used on the local machine to transfer a mail message to a remote machine, and how Sendmail can also be used on the remote machine to receive a mail message (Source: www.feep.net).
Sendmail at MTA on Both Local and Remote Machines

Table of Contents

 About This Book

 1957 - FORTRAN Language Developed by IBM

 1970 - UNIX Operating System Developed by AT&T Bell Labs

 1971 - FTP Protocol Created by Abhay Bhushan

 1972 - C Language Developed by Dennis Ritchie

 1976 - vi Text Editor Developed by Bill Joy

 1977 - Apple II Designed by Steve Jobs and Steve Wozniak

 1977 - The Bourne Shell Developed by Stephen Bourne

 1978 - The C Shell Developed by Bill Joy

 1978 - Bash (Bourne-Again Shell) Developed by Brian Fox

 1979 - The Tcsh (TENEX C Shell) Developed by Ken Greer

1983 - "Sendmail" Mail Transfer Agent Developed by Eric Allman

What Is Sendmail?

 Using Sendmail as a Mail User Agent (MUA)

 Pushing an Email Message in Mail Queue

 Using Sendmail as a STMP Server Daemon

 1984 - Macintosh Developed by Apple Inc.

 1984 - X Window System Developed a MIT Team

 1991 - WWW (World Wide Web) Developed by Tim Berners-Lee

 1991 - Gopher Protocol Created by a University of Minnesota Team

 1995 - Java Language Developed by Sun Microsystems

 1995 - PHP: Hypertext Preprocessor Created by Rasmus Lerdorf

 2002 - .NET Framework Developed by Microsoft


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