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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)
9 TCP/IP Electronic Mail Access and Retrieval Protocols and Methods
9 TCP/IP Internet Message Access Protocol (IMAP/IMAP4)
IMAP Selected State: Message Manipulation Process and Commands
(Page 1 of 3)
Once the IMAP client has been authorized
to access the server, it enters the Authenticated state, where
it is allowed to execute tasks on whole mailboxes. Since IMAP allows
multiple mailboxes to be manipulated, message-specific commands cannot
be used until the client tells the server what mailbox in wants to work
with. Only one mailbox can be accessed at a time in a given session.
After the SELECT or EXAMINE
command is successfully issued, the session enters the Selected
state. In this state, the full palette of message and mailbox
commands is available to the client. This includes the message-specific
commands below as well as the mailbox commands defined for the Authenticated
state. Most of IMAP's message-specific commands do not include a mailbox
name as a parameters, since the server knows automatically that the
commands apply to whatever mailbox was selected in the Authenticated
The session remains in the Selected
state for as long as the client continues to have work to do with the
particular selected (or examined) mailbox. Three different
actions can cause a transition out of the Selected state:
- If the client has nothing more to do when it
is done with the current mailbox, it can use the LOGOUT command
to end the session.
- The client can use the CLOSE command to
tell the server it is done with the current mailbox but keep the session
active. The server will close the mailbox and the session will go back
to the Authenticated state.
- The client can issue a new SELECT or EXAMINE
command. This will implicitly close the current mailbox and then open
the new one. The transition in this case is from the Selected
state back to the Selected state, but with a new current mailbox.
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The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005
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