The following function set is a complete implementation of the Post Office Protocol 3. The MD5 message digest encryption standard and other optional POP3 commands are also implemented. The POP3 functions can also be used mixed with the Application Level functions. This means it is possible to use the same handle hWeb with WebPopConnect and WebTcpipRecv, for instance. Most of the POP3 functions send a command to the POP3 server and interpret the response immediately. For example, WebPopUser sends the USER command to the server and returns “true” if the server responds with "+OK".