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Get info about the Encyclopedia of Networking and Telecommunicatons, 3rd edition (2001)
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Note: Many topics at this site are reduced versions of the text in "The Encyclopedia of Networking and Telecommunications." Search results will not be as extensive as a search of the book's CD-ROM.
Sendmail is an SMTP-compatible mail server that has been used for over 20 years in the UNIX and Internet environments. It is an MTA (message transfer agent) that transfers messages from user agents and delivers them to mail servers. Like other MTAs, it attempts to deliver mail to the recipient immediately; but if the recipient's mailbox is not available, it queues the message for later delivery.
Historically, Sendmail has been hard to administer and has had a number of security problems. But many of Sendmail's problems have been worked out. Sendmail, Inc., has a commercial version of the package with many enhancements. You can also obtain Sendmail source code from Sendmail.ORG.
Copyright (c) 2001 Tom Sheldon and Big Sur Multimedia.