...HS POP3 is a software library in C (supplied with full source code) implements...according to RFC 1939. Among other features, the library supports user authentication, reception of basic internet headers...POP3 over TLS / SSL using two methods: POP3S (used by Gmail) and RFC 2595 HS POP3...and login user name and password. HS POP3 library then resolves the server name, connects to it,...repeated until all messages are received.