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URL:
http://ietf.org/rfc/rfc1939.txt
On certain types of smaller nodes in the Internet it
is often impractical to maintain a message transport system (MTS). For example,
a workstation may not have sufficient resources (cycles, disk space) in order
to permit a SMTP server and associated local e-mail delivery system to be kept
resident and continuously running. Similarly, it may be expensive (or
impossible) to keep a personal computer interconnected to an IP-style network
for long amounts of time.
The Post Office Protocol - Version 3 (POP3) is
intended to permit a workstation to dynamically access a mail-drop on a server
host in a useful fashion. POP3 is not intended to provide extensive
manipulation operations of e-mail on the server; normally, e-mail is downloaded
and then deleted. A more advanced (and complex) protocol is IMAP4.
POP3 is defined in RFC1939.
Keywords:
Mail, Internet, Protocol, Application layer
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