connection
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... into the transport system, it establishes an SMTP connection to
its relay host (this relay host ...
... client host wishes to make use of the service,
it establishes a TCP connection with the server host. When the
connection ...
... TCP connection with the server host. When the
connection is established, the POP3 server sends a greeting. The
client ...
... POP3 server then exchange commands and responses
(respectively) until the connection is closed or aborted.
Commands in the POP3 ...
... session progresses through a number of states during its
lifetime. Once the TCP connection has been opened and the POP3
server has sent the greeting, the session ...
... the UPDATE state--the server should close the TCP connection without
removing any messages or sending any response to the client ...
... POP3 server must release the lock prior to rejecting the command.)
After returning a negative status indicator, the server may close the
connection. If the server does not close the connection, the client
...
... After returning a negative status indicator, the server may close the
connection. If the server does not close the connection, the client
may either issue a new authentication ...
... the maildrop. It then releases any exclusive-access lock
on the maildrop and replies as to the status of these
operations. The TCP connection is then closed.
Possible Responses:
...
... connection on TCP port 110>
C: <open connection>
S: +OK POP3 server ready <1896.697170952@dbc.mtview.ca.us>
...
... POP3 server signing off (maildrop empty)
C: <close connection>
S: <wait for next connection>
...
... C: <close connection>
S: <wait for next connection>
...