Description:

libspopc is a simple-to-use POP3 client library. It's primary goal is
to provide an easy and quick way to host a POP3 client within a
program to C developers without exposing them to socket programming.
However, the socket layer is also accessible. libspopc allows mail
programs to connect to many POP accounts and manage email. It
implements the client side of RFC 1939. The email client can download
email headers before downloading the entire message.