java - 无法从 GAE 的 java mail APi 发送邮件

Question

我正在尝试使用 Java 邮件 Api 发送电子邮件，并且我的应用程序部署在 Google App Engine 上，

早些时候我能够从我的java代码发送电子邮件，但最近它停止了，

下面是错误

javax.mail.AuthenticationFailedException: 534-5.7.14 <https://accounts.google.com/signin/continue?sarp=1&scc=1&plt=AKgnsbuq
534-5.7.14 szPbAPjs-PmJgBd5xmPAVgRB8-3WxkoQy7WaGBIGRyltJO9LxKnw0oagw1e-jZeQcgABnK
534-5.7.14 mcxSUPyD4ohtBPkovBS45tnMElRdeWM7mzfw2wU3vqqQpDw7_8Z9rphQR_SZpR> Please
534-5.7.14 log in via your web browser and then try again.
534-5.7.14 Learn more at
534 5.7.14 https://support.google.com/mail/answer/78754 186sm22205348pfb.99 - gsmtp

我已经完成了所有操作，在 IAM 中添加了 gmail 帐户，因为所有者在 gmail 中启用了 lesssecure 选项，但我仍然遇到相同的错误

这是代码

public static void sendWelcomeMail(String msg,String email,String subject) {
         System.out.println("Starte - "+email);
       final String username = "serv*******@gmail.com";
       final String password = "********";

       Properties prop = new Properties();
       prop.put("mail.smtp.host", "smtp.gmail.com");
       prop.put("mail.smtp.port", "465");
       prop.put("mail.smtp.auth", "true");
       prop.put("mail.smtp.socketFactory.port", "465");
       prop.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");

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

       try {

        Message message = new MimeMessage(session);
           message.setFrom(new InternetAddress(username));
           message.setRecipients(
                   Message.RecipientType.TO,
                   InternetAddress.parse(email+", fo*********@gmail.com")
           );
           message.setSubject(subject);
           Multipart multipart = new MimeMultipart(); //1
        // Create the HTML Part
        BodyPart htmlBodyPart = new MimeBodyPart(); //4
        htmlBodyPart.setContent(msg, "text/html"); //5

        multipart.addBodyPart(htmlBodyPart); // 6
        // Set the Multipart's to be the email's content
        message.setContent(multipart); //7 

           Transport.send(message);

           System.out.println("Done");
       }catch(Exception e) {
        e.printStackTrace();
       }
    }

但是从我的本地计算机我可以发送电子邮件。让我知道我做错了什么。

TIA

Answer 1

这是我用来解决问题的更改。

我更改了这部分代码:

message.setRecipients(
                   Message.RecipientType.TO,
                   InternetAddress.parse(email+", fo*********@gmail.com")
       );

对此:

message.addRecipient(
                   Message.RecipientType.TO,
                   new InternetAddress(email, "")
           );

代码的另一部分来自:

message.setFrom(new InternetAddress(用户名));

对此:

message.setFrom(new InternetAddress(用户名, "Admin"));

因此，这是完整的代码:

public static void sendWelcomeMail(String msg,String email,String subject) {
       final String username = "ser******@gmail.com";
       final String password = "**********";

       Properties prop = new Properties();
       prop.put("mail.smtp.host", "smtp.gmail.com");
       prop.put("mail.smtp.port", "465");
       prop.put("mail.smtp.auth", "true");
       prop.put("mail.smtp.starttls.enable", "true");
       prop.put("mail.smtp.socketFactory.port", "465");
       prop.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");

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

       try {

        Message message = new MimeMessage(session);
           message.setFrom(new InternetAddress(username, "Admin"));
           message.addRecipient(
                   Message.RecipientType.TO,
                   new InternetAddress(email, "")
           );
           message.addRecipient(
                   Message.RecipientType.CC,
                   new InternetAddress("fo********@gmail.com", "")
           );
           message.setSubject(subject);
           Multipart multipart = new MimeMultipart(); //1
        // Create the HTML Part
        BodyPart htmlBodyPart = new MimeBodyPart(); //4
        htmlBodyPart.setContent(msg, "text/html"); //5

        multipart.addBodyPart(htmlBodyPart); // 6
        // Set the Multipart's to be the email's content
        message.setContent(multipart); //7 

           Transport.send(message);

           System.out.println("Done");
       }catch(Exception e) {
           System.out.println("Exception in sending mail - "+e.getMessage());
        e.printStackTrace();
       }
    }