Computer History - Herong's Notes - Version 3.11, by Dr. Herong Yang
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
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