java - 已发送邮件的送达确认

Question

我的要求是为我们的客户向各种客户发送电子邮件警报，我们计划为此使用 JavaMail API。但是，一旦邮件发送完毕，我们需要根据邮件的状态将数据库中的状态更新为已发送/已送达/失败。请告诉我如何获取到达收件人邮件服务器的邮件的送达通知。没有必要确保此人是否已阅读邮件，但是，如果我们能够知道这一点，那就太好了。必须检查的是交货。我们如何获得状态。我读到的是使用“SMTPMessage”我们可以获得状态，但是，我找不到有关如何读取通知的代码示例。我正在放置我的代码，这是我到目前为止所做的非常示例。请让我知道如何实现我们正在努力实现的目标。

public class MailSender {
    private int port = 25;
    private String host = "testmailsrvr";
    private String from = "test@test.com";
    private boolean auth = true;
    private String username = "test";
    private String password = "test@123";
    private Protocol protocol = Protocol.SMTP;
    private boolean debug = true;


    public void sendEmail(String strMailID, String strSubject, String strBody) throws MessagingException{
        Properties props = new Properties();
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.port", port);
        switch (protocol) {
        case SMTPS:
            props.put("mail.smtp.ssl.enable", true);
            break;
        case TLS:
            props.put("mail.smtp.starttls.enable", true);
            break;
        case SMTP:
            props.put("mail.smtp.ssl.enable", false);
            break;
        }

        Authenticator authenticator = null;
        if (auth) {
            props.put("mail.smtp.auth", true);
            authenticator = new Authenticator() {
                private PasswordAuthentication pa = new PasswordAuthentication(username, password);
                @Override
                public PasswordAuthentication getPasswordAuthentication() {
                    return pa;
                }
            };
        }

        Session session = Session.getInstance(props, authenticator);
        session.setDebug(debug);

        MimeMessage message = new MimeMessage(session);
        message.setFrom(new InternetAddress(from));

        InternetAddress[] toAddress = {new InternetAddress(strMailID)};
        message.setRecipients(Message.RecipientType.TO, toAddress);

        message.setSubject(strSubject);
        message.setSentDate(new Date());

        message.setText(strBody);
        Transport.send(message);
    }
}

Answer 1

您需要阅读这些 JavaMail FAQ 条目:

• > If I send a message to a bad address, why don't I get a SendFailedException or TransportEvent indicating that the address is bad?
• > When a message can't be delivered, a failure message is returned. How can I detect these "bounced" messages?

然后阅读 com.sun.mail.smtp 的 javadocs和 com.sun.mail.dsn包裹以了解递送状态通知。