If you want processing to talk to a mail server to send e-mail you'll need: http://www.faqs.org/rfcs/rfc821.html

That's the document that defines the standard for sending e-mail that most programs and mail servers understand.

Hi Stoic

Fancy sharing that?

Cheers, Andy

//This works without any extra libraries!

//Code adapted from http://www.javaworld.com/javaworld/javatips/jw-javatip36-p3.html

//and Craig Morrall <morrall at comp.lancs.ac.uk>

String sender = "<me at gold.ac.uk>";
String reciever = "<someone else at gold.ac.uk>";
String subject = "This message is coming from Processing";
String message = "Mail Message";
String mailServer = "postbox.gold.ac.uk";

//strange java thing to get a correct carriage return
String  carriageReturn = System.getProperty("line.separator");

void setup()
{
 sendMessage();
}

void sendMessage()
{
 println("Trying...");
 try {

   //connect to the mail server
   Socket socket = new Socket(mailServer, 25);

   //create an in and out connection
   DataOutputStream out = new DataOutputStream(socket.getOutputStream());
   DataInputStream in = new DataInputStream(socket.getInputStream());

   //ask your machine what it's really called
   String hostname = InetAddress.getLocalHost().getHostName();
   println("HOST: "+hostname);

   //converse with the mail server
   readIn(in);
   sendEmail(out, in, "HELO " + hostname + carriageReturn);
   readIn(in);
   sendEmail(out, in, "RSET" + carriageReturn);
   readIn(in);
   //tell the mail server your email
   sendEmail(out, in, "MAIL FROM: " + sender + carriageReturn);
   readIn(in);
   //tell the mail server where you want to send the message
   sendEmail(out, in, "RCPT TO: " + reciever + carriageReturn);
   readIn(in);
   //start the message body
   sendEmail(out, in, "DATA" +  carriageReturn);
   readIn(in);
   sendEmail(out, in, "To:" + reciever + carriageReturn);
   sendEmail(out, in, "From:" + sender + carriageReturn);
   sendEmail(out, in, "Subject: " + subject + carriageReturn);
   sendEmail(out, in, message);

   //close the message body
   sendEmail(out, in, carriageReturn + "." + carriageReturn);
   //end of message body

   //end the conversation
   readIn(in);
   sendEmail(out, in, "QUIT" + carriageReturn);
   readIn(in);

   //close the connections
   in.close();
   out.close();

   println("Message '" + subject + "' sent to '" + reciever + "'");

 }//end of try statement
 catch (UnknownHostException e)
 {
   println("Unknown Host Exception: " + e);
 }//end of catch statement
 catch(IOException e)
 {
   println("Send failure: " + e);
 }//end of catch statement

}//end of method sendMessage

void sendEmail(DataOutputStream out, DataInputStream in, String stringHolder)
throws IOException
{

 if(stringHolder != null)
 {
   out.writeBytes(stringHolder);
   println(stringHolder);
 }//end of if statement

}//end of method sendEmail

void readIn(DataInputStream in)
throws IOException
{
 String record;

 if ((record = in.readLine()) != null)
 {
   println("Message from host: "+record);
 }//end of if statement

}//end of method readIn