hurrdurrimasheep

import java.io.*;
import java.net.ConnectException;
import java.net.Socket;

public class EmailSender {

    public static void main(String[] args) {

/* INITIALIZING VARIABLES                                                     */
    //Declaring variable and pulling values from arguments
        String emailserver_hostname = args[0];
        int emailserver_port_number = Integer.parseInt(args[1]);
        String my_username = args[2];
        String my_emailaddress = args[3];

    // Initializing client's socket to connect to email server (connectsocket)
        Socket connectsocket = null;

    // Initializing responses from EmailServer
        String replycode = "";

    // Initializing email to be sent
        String email_body = "SUBJECT: TEST" + System.getProperty("line.separator") + "Test" + ";" + ".." + "/n" + System.getProperty("line.separator") + ".";

/* ESTABLISHING TCP CONNECTION                                              */

            try {
            // Creating a socket and connecting to server
                connectsocket = new Socket(emailserver_hostname, emailserver_port_number);

            // Establishing IO stream writers for the socket.
                // Note: I know the examples use DataOutputStream, but I could only get it to work when using
                // PrintWriter methods. I learned about it from here:
                // http://docs.oracle.com/javase/tutorial/networking/sockets/clientServer.html

                PrintWriter dataout = new PrintWriter(connectsocket.getOutputStream(), true);
                BufferedReader datain = new BufferedReader(new InputStreamReader(connectsocket.getInputStream()));


                // Obtaining the 220 reply code
                replycode = datain.readLine();
                // Print it to the user
                System.out.println(replycode);

/* SENDING COMMANDS                                     */
            // Processing HELO command
                dataout.println("HELO " + my_username);
                System.out.println("HELO " + my_username);
                replycode = datain.readLine();
                System.out.println(replycode);

            // Processing MAIL FROM command
                dataout.println("MAIL FROM: " + my_emailaddress);
                System.out.println("MAIL FROM: " + my_emailaddress);
                replycode = datain.readLine();
                System.out.println(replycode);

            // Processing RCPT TO command
                dataout.println("RCPT TO: " + my_emailaddress);
                System.out.println("RCPT TO: " + my_emailaddress);
                replycode = datain.readLine();
                System.out.println(replycode);

            // Processing DATA command and email to be sent
                dataout.println("DATA");
                System.out.println("DATA");
                replycode = datain.readLine();
                System.out.println(replycode);
                dataout.println(email_body);
                System.out.println(email_body);
                replycode = datain.readLine();
                System.out.println(replycode);

            // Processing QUIT command
                dataout.println("QUIT");
                replycode = datain.readLine();
                System.out.println(replycode);
                replycode = datain.readLine();
                System.out.println(replycode);


                // Closing the socket when connection is closed. (I know the server does it as well, but why leave a waiting port)
                connectsocket.close();


            // Catching exceptions thrown by server
            }catch (IOException e) {
                System.out.println("Error with connection, connection not established.");
                e.printStackTrace();
                System.exit(1);
        }
    }
}