import java.io.*; 
import java.net.*; 
class EmailClient { 

    public static void main(String argv[]) throws Exception 
    { 
        String smtp_server = "smtp.chapman.edu";
	String my_email = "smith237@chapman.edu";
	String send_to_address, subject, status;

        BufferedReader inFromUser = 
          new BufferedReader(new InputStreamReader(System.in)); 

        Socket clientSocket = new Socket(smtp_server, 25); 

        DataOutputStream outToServer = 
          new DataOutputStream(clientSocket.getOutputStream()); 

	BufferedReader inFromServer = 
          new BufferedReader(new
          InputStreamReader(clientSocket.getInputStream())); 
	
	String send; 

	System.out.print("Send an email to: ");
	send_to_address = inFromUser.readLine();

	System.out.print("Message Subject: ");
	subject = inFromUser.readLine();
	status = inFromServer.readLine();

	if (!status.startsWith("220"))
	{
		System.out.println("Error!");
		System.out.println(status);
		clientSocket.close(); 
		System.exit(1);
	}
        
	outToServer.writeBytes("HELO acm.chapman.edu" + '\n'); 
	status = inFromServer.readLine();

	if (!status.startsWith("250"))
	{
		System.out.println("Error!");
		System.out.println(status);
		clientSocket.close(); 
		System.exit(1);
	}
	
	send = "MAIL FROM: " + my_email + "\n";
        outToServer.writeBytes(send); 
	status = inFromServer.readLine();
	if (!status.startsWith("250"))
	{
		System.out.println("Error!");
		System.out.println(status);
		clientSocket.close(); 
		System.exit(1);
	}

	send = "RCPT TO: " + send_to_address + "\n";
	System.out.println(send);
        outToServer.writeBytes(send); 
	status = inFromServer.readLine();
	if (!status.startsWith("250"))
	{
		System.out.println("Error!");
		System.out.println(status);
		clientSocket.close(); 
		System.exit(1);
	}

        outToServer.writeBytes("DATA" + '\n'); 
	status = inFromServer.readLine();
	if (!status.startsWith("354"))
	{
		System.out.println("Error!");
		System.out.println(status);
		clientSocket.close(); 
		System.exit(1);
	}

	send = "Subject: " + subject + "\n\n";
	System.out.println(send);
	outToServer.writeBytes(send);
	
        outToServer.writeBytes("Hello, World!\n.\n"); 
	status = inFromServer.readLine();

	if (!status.startsWith("250"))
	{
		System.out.println("Error!");
		System.out.println(status);
		clientSocket.close(); 
		System.exit(1);
	}

	send = "QUIT"+  '\n';
	System.out.println(send);
	outToServer.writeBytes(send); 
	status = inFromServer.readLine();
	if (!status.startsWith("221"))
	{
		System.out.println("Error!");
		System.out.println(status);
		clientSocket.close(); 
		System.exit(1);
	}
	
        clientSocket.close(); 
                   
    } 
}