java - 发送电子邮件无需身份验证

Question

我正在尝试开发一个代码，允许使用 javamail 发送邮件而无需身份验证。

        Properties properties = System.getProperties();
        properties.put("mail.smtp.auth", "false");
        properties.put("mail.smtp.starttls.enable", "true");
        properties.put("mail.smtp.host", "smtp.gmail.com");
        properties.put("mail.smtp.port", 587);
        Session session = Session.getInstance(properties);
        try {
            MimeMessage message = new MimeMessage(session);
            message.setFrom(new InternetAddress("xxxxxx@hotmail.com"));
            message.addRecipient(Message.RecipientType.TO,
                    new InternetAddress("yyyyyyy@gmail.com"));
            message.setSubject("This is the Subject Line!");
            message.setText("This is actual message");
            Transport.send(message);
            System.out.println("Sent message successfully....");
        } catch (MessagingException mex) {
            mex.printStackTrace();
        }

但是当我执行它时，我得到了这个异常

com.sun.mail.smtp.SMTPSendFailedException: 530-5.5.1 Authentication Required.

是否可以不认证就发送邮件？我错过了什么吗？

Answer 1

试试这个

    Properties props = new Properties();
    props.put("mail.smtp.host", mailHost);
    props.put("mail.smtp.port", port);
    props.put("mail.smtp.auth", "true");
    props.put("mail.smtp.starttls.enable", "true");

    Session session = Session.getInstance(props, new javax.mail.Authenticator() {
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(username, password);
        }
    });

    session.setDebug(true);

    MimeMessage message = new MimeMessage(session);

    message.setFrom(new InternetAddress(fromAddress));
    message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(toAddress));
    message.setSubject(subject);
    message.setContent(body, "text/html; charset=utf-8");
    message.setText(body);
    Transport.send(message);