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|| The TCP/IP Guide|
9 TCP/IP Application Layer Protocols, Services and Applications (OSI Layers 5, 6 and 7)
9 TCP/IP Key Applications and Application Protocols
9 TCP/IP File and Message Transfer Applications and Protocols (FTP, TFTP, Electronic Mail, USENET, HTTP/WWW, Gopher)
9 TCP/IP Electronic Mail System: Concepts and Protocols (RFC 822, MIME, SMTP, POP3, IMAP)
TCP/IP Electronic Mail Addresses and Addressing
The entire concept of electronic
mail is based on an analogy: the comparison of sending electronic messages
to the sending of paper messages. The analogy works well because e-mail
was indeed intended to be like regular mail, only with the advantages
of the electronic era: speed and flexibility.
One of the many similarities between
electronic and regular mail is the need for addressing. In order
for a message to be delivered, it is necessary that the sender specify
who the recipient is, and provide a reasonable amount of information
to indicate how the recipient can be reached. In TCP/IP electronic mail,
a standard electronic mail address format is used for this, and
support is also provided for alternative addressing schemes that may
be used in special cases.
In this section I describe how electronic
mail messages are addressed. I begin with a discussion of standard electronic
mail addressing in TCP/IP, and how those addresses are used to determine
where e-mail should be sent. I then provide a brief discussion of historical
and special e-mail addresses that you may encounter from time to time.
I also discuss the use of e-mail address books (aliases) and how multiple
recipients may be addressed, as well as providing an overview of electronic
mailing lists, one of the earliest ways in which electronic group communication
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The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005
© Copyright 2001-2005 Charles M. Kozierok. All Rights Reserved.
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