Your questions is a bit unclear (for me, anyway).
Looking at what happens, all seems to be ok:
You are trying to telnet to a non telnet port (port 110 being pop3, port 23 being telnet).
If you telnet to port 110, you see that your pop3 answers. So both your telnet client and pop3 seem to be working.
What is it you want to accomplish??
If you want to be able to telnet to your own machine, install/activate the telnet daemon. Then you can telnet to your localhost (without specifying the port, it will default to 23, the telnet port).