The stunnel program is designed to work as SSL encryption wrapper
between remote client and local (inetd-startable) or remote server.
The concept is that having non-SSL aware daemons running on your
system you can easily setup them to communicate with clients over
secure SSL channel.

stunnel can be used to add SSL functionality to commonly used inetd
daemons like POP-2, POP-3 and IMAP servers without any changes in
the program code.