ssh tunnelling

To Create a local ssh tunnel on your machine (port 1234 – example) to the POP3 server’s port 110. You will need to be the root user to bind to “privileged” ports

ssh -f -N -L 1234:localhost:110 user@POP3_server

Test the tunnel.
telnet localhost 1234
You should see the POP3 server’s banner information.

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