使用javax.mail通过ssl发送电子邮件

Question

我想使用gmail作为smtp服务器发送电子邮件.

这是我的代码,我没有让它工作...运行testSettings()后,我得到调试输出,然后它就停止了.没有超时,没有错误,没有......

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("myemail@gmail.com"));
        message.setRecipients(Message.RecipientType.TO,
                InternetAddress.parse("myemail@gmail.com"));
        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

发生以下错误:http: //pastie.org/private/rkoknss6ppiufjd9swqta

Answer 1

从阅读本文:http: //www.oracle.com/technetwork/java/javamail/faq-135477.html#commonmistakes

指某东西的用途

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

和

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

有点过时了.要简化代码,请使用:

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

Answer 2

代替

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

运输运输= session.getTransport("smtps");

使用

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

运输运输= session.getTransport("smtp");

使用smtp,而不是smtps

我使用了JDK 8,Netbeans 8,JavaMail 1.5.2,这个例子运行正常:

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("username@gmail.com","password");
            }
        });

    try {

        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress("frommail@gmail.com"));
        message.setRecipients(Message.RecipientType.TO,
                InternetAddress.parse("tomail@gmail.com"));
        message.setSubject("Testing Subject");
        message.setText("Test Mail");

        Transport.send(message);

        System.out.println("Done");

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

如果您无法连接端口465,请尝试端口587