Java Code to Send E-Mail

• You can send or fetch e-mail through your Java application or servlet using the JavaMail API.
• You use the JavaMail API where as JavaMail implementation providers implement the JavaMail API to give you a JavaMail client (Java JAR file). Sun gives you mail.jar which has Sun's SMTP, POP3 and IMAP client implementations along with the JavaMail API. This is sufficient to send and receive e-mail but not to read or post to newgroups which use NNTP.

• To compile and run, you must have mail.jar (from the JavaMail download) and activation.jar (from the JavaBeans Activation Framework download) in Java classpath.
• You need to replace email addresses and mail server with your values where noted. Username and password is generally not needed to send e-mail although your ISP may still require it to prevent spam from going through its systems.
• This sample code has debugging turned on ("mail.debug") to see what is going on behind the scenes in JavaMail code.

  import java.util.*;
  import javax.mail.*;
  import javax.mail.internet.*;
  import javax.activation.*;
  
  // Send a simple, single part, text/plain e-mail
   public class TestEmail {
  
      public static void main(String[] args) {
  
          // SUBSTITUTE YOUR EMAIL ADDRESSES HERE!!!
          String to = "subh@subh.com";
           String from = "subh@subh.com";
          // SUBSTITUTE YOUR ISP'S MAIL SERVER HERE!!!
          String host = "smtp.yourisp.net";
   
          // Create properties, get Session
          Properties props = new Properties();
  
          // If using static Transport.send(),
          // need to specify which host to send it to
          props.put("mail.smtp.host", host);
           // To see what is going on behind the scene
          props.put("mail.debug", "true");
          Session session = Session.getInstance(props);
  
          try {
               // Instantiatee a message
              Message msg = new MimeMessage(session);
  
              //Set message attributes
              msg.setFrom(new InternetAddress(from));
               InternetAddress[] address = {new InternetAddress(to)};
              msg.setRecipients(Message.RecipientType.TO, address);
              msg.setSubject("Test E-Mail through Java");
               msg.setSentDate(new Date());
  
              // Set message content
              msg.setText("This is a test of sending a " +
                          "plain text e-mail through Java.\n" +
                           "Here is line 2.");
  
              //Send the message
              Transport.send(msg);
          }
          catch (MessagingException mex) {
              // Prints all nested (chained) exceptions as well
               mex.printStackTrace();
          }
      }
  }//End of class