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copied!<p>First download the <a href="https://java.net/projects/javamail/pages/Home" rel="noreferrer">JavaMail API</a> and make sure the relevant jar files are in your classpath.</p> <p>Here's a full working example using GMail.</p> <pre><code>import java.util.*; import javax.mail.*; import javax.mail.internet.*; public class Main { private static String USER_NAME = "*****"; // GMail user name (just the part before "@gmail.com") private static String PASSWORD = "********"; // GMail password private static String RECIPIENT = "lizard.bill@myschool.edu"; public static void main(String[] args) { String from = USER_NAME; String pass = PASSWORD; String[] to = { RECIPIENT }; // list of recipient email addresses String subject = "Java send mail example"; String body = "Welcome to JavaMail!"; sendFromGMail(from, pass, to, subject, body); } private static void sendFromGMail(String from, String pass, String[] to, String subject, String body) { Properties props = System.getProperties(); String host = "smtp.gmail.com"; props.put("mail.smtp.starttls.enable", "true"); props.put("mail.smtp.host", host); props.put("mail.smtp.user", from); props.put("mail.smtp.password", pass); props.put("mail.smtp.port", "587"); props.put("mail.smtp.auth", "true"); Session session = Session.getDefaultInstance(props); MimeMessage message = new MimeMessage(session); try { message.setFrom(new InternetAddress(from)); InternetAddress[] toAddress = new InternetAddress[to.length]; // To get the array of addresses for( int i = 0; i < to.length; i++ ) { toAddress[i] = new InternetAddress(to[i]); } for( int i = 0; i < toAddress.length; i++) { message.addRecipient(Message.RecipientType.TO, toAddress[i]); } message.setSubject(subject); message.setText(body); Transport transport = session.getTransport("smtp"); transport.connect(host, from, pass); transport.sendMessage(message, message.getAllRecipients()); transport.close(); } catch (AddressException ae) { ae.printStackTrace(); } catch (MessagingException me) { me.printStackTrace(); } } } </code></pre> <p>Naturally, you'll want to do more in the <code>catch</code> blocks than print the stack trace as I did in the example code above. (Remove the <code>catch</code> blocks to see which method calls from the JavaMail API throw exceptions so you can better see how to properly handle them.)</p> <hr> <p>Thanks to <a href="https://stackoverflow.com/users/4223/jodonnell">@jodonnel</a> and everyone else who answered. I'm giving him a bounty because his answer led me about 95% of the way to a complete answer.</p>

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