使用 JavaMail API 发送邮件时出现 javax.mail.MessagingException

Question

我尝试通过我的 gmail 帐户使用 JavaMail API 发送电子邮件，但出现 javax.mail.MessagingException 异常

代码:

  public static Result sendMail() {

      Map < String, String[] > values = request().body().asFormUrlEncoded();

      String toAddresses = values.get("toaddrs")[0];
      String subject = values.get("subject")[0];
      String body = values.get("body")[0];

      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() {
          protected PasswordAuthentication getPasswordAuthentication() {
              return new PasswordAuthentication("samplemail@gmail.com", "samplepass");
          }
      });

      try {

          Message message = new MimeMessage(session);
          message.setFrom(new InternetAddress("samplemail@gmail.com"));
          message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(toAddresses));
          message.setSubject(subject);
          message.setText(body);

          Transport.send(message);
          return ok("sent");

      } catch (MessagingException e) {
          return ok("Error in sending email");
      }


  }

在调试时，我最终进入服务类

抛出异常:javax.mail.MessagingException:必须指定主机、用户名和密码。

Answer 1

更正这些common mistakes 。如果还是不行，发帖debug output .