This package can be used to send e-mail messages via SMTP connections.
There is one class that takes care of establishing a TCP socket connection to send and retrieve data through that socket.
There is another class that establishes a connection with an SMTP server using the socket class.
It can send a message an SMTP server from a given sender address to one or more recipient addresses.
If necessary, the class can authenticate with a server that supports the LOGIN authentication mechanism.