sending mail from apache tomcat

Question

I am working on a web project using Tomcat 6 as my webserver and JSP as frontend. I want to send a mail from the web server to an email account. How can I achieve this?

Answer 1

This is simplest way, using MailToURLConnection. No additional libraries needed.

public static void sendMail(String from, String to, String subject, String body, String[] headers) throws IOException {
   System.setProperty("mail.host", "localhost");

   URL u = new URL("mailto:"+to);
   MailToURLConnection con = (MailToURLConnection)u.openConnection();
   OutputStream os = con.getOutputStream();
   OutputStreamWriter w = new OutputStreamWriter(os);

   DateFormat df = new SimpleDateFormat("E, d MMM yyyy H:mm:ss Z");
   Date d = new Date();
   String dt = df.format(d);
   String mid = d.getTime()+from.substring(from.indexOf('@'));

   w.append("Subject: "+subject+"\r\n");
   w.append("Date: " +dt+ "\r\n");
   w.append("Message-ID: <"+mid+ ">\r\n");
   w.append("From: "+from+"\r\n");
   w.append("To: <"+to+">\r\n");
   if(headers!=null) {
      for(String h: headers)
         w.append(h).append("\r\n");
   }
   w.append("\r\n");

   w.append(body.replace("\n", "\r\n"));
   w.flush();
   w.close();
   os.close();
   con.close();
}