sending email with ssl using javax.mail

Question

i want to send an email using gmail as smtp server.

this is my code, and i do not get it to work... after running testSettings() i get the debug output and then it just stops. no timeout, no error, nothing....

public void testSettings() {
    final String username = Settings.get("benutzername");
    final String password = Settings.get("passwort");

    Properties props = new Properties();
    props.put("mail.transport.protocol", "smtps");

        props.put("mail.smtp.starttls.enable", "true");
        props.put("mail.smtp.socketFactory.port", Settings.get("port"));
        props.put("mail.smtp.socketFactory.class",
                "javax.net.ssl.SSLSocketFactory");

    props.put("mail.smtp.auth", "true");

    props.put("mail.smtp.host", Settings.get("server"));
    props.put("mail.smtp.port", Settings.get("port"));
    props.put("mail.smtp.timeout", "10000");

    props.put("mail.smtp.ssl.checkserveridentity", "false");
    props.put("mail.smtp.ssl.trust", "*");
    props.put("mail.smtp.connectiontimeout", "10000");

    props.put("mail.smtp.debug", "true");
    props.put("mail.smtp.socketFactory.fallback", "false");
    Session session = Session.getInstance(props,
            new javax.mail.Authenticator() {
                protected PasswordAuthentication getPasswordAuthentication() {
                    return new PasswordAuthentication(username, password);
                }
            });
    session.setDebug(true);
    try {

        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress("[email protected]"));
        message.setRecipients(Message.RecipientType.TO,
                InternetAddress.parse("[email protected]"));
        message.setSubject("Testing Subject");
        message.setText("test");
        Transport transport = session.getTransport("smtps");
        transport.send(message);
        // Transport.send(message);

        System.out.println("Done");

    } catch (MessagingException e) {
        // throw new RuntimeException(e);
    }
}


DEBUG: setDebug: JavaMail version 1.4.7
DEBUG: getProvider() returning     javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle]
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "smtp.gmail.com", port 587, isSSL false

The following error occurs: http://pastie.org/private/rkoknss6ppiufjd9swqta

Answer 1

From reading this: http://www.oracle.com/technetwork/java/javamail/faq-135477.html#commonmistakes

The use of

props.put("mail.smtp.socketFactory.class",
        "javax.net.ssl.SSLSocketFactory");** 

and

props.put("mail.smtp.socketFactory.port", "465");

is kind of outdated. To simplify the code, use:

properties.put("mail.smtp.port", "465");
properties.put("mail.smtp.ssl.enable", "true");

Answer 2

Instead of

props.put("mail.transport.protocol", "smtps");

Transport transport = session.getTransport("smtps");

Use

props.put("mail.transport.protocol", "smtp");

Transport transport =session.getTransport("smtp");

Use smtp, not smtps

I used JDK 8, Netbeans 8, JavaMail 1.5.2 and this example works fine:

public static void main(String[] args) {
    Properties props = new Properties();
    props.put("mail.smtp.host", "smtp.gmail.com");
    props.put("mail.smtp.socketFactory.port", "465");
    props.put("mail.smtp.socketFactory.class",
            "javax.net.ssl.SSLSocketFactory");
    props.put("mail.smtp.auth", "true");
    props.put("mail.smtp.port", "465"); 
    Session session = Session.getDefaultInstance(props,
        new javax.mail.Authenticator() {
                            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication("[email protected]","password");
            }
        });

    try {

        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress("[email protected]"));
        message.setRecipients(Message.RecipientType.TO,
                InternetAddress.parse("[email protected]"));
        message.setSubject("Testing Subject");
        message.setText("Test Mail");

        Transport.send(message);

        System.out.println("Done");

    } catch (MessagingException e) {
        throw new RuntimeException(e);
    }
}

If you are not able connect with port 465, try port 587