發送郵件：身份驗證失敗

Question

我正在嘗試從應用發送電子郵件，並且使用以下代碼：

private static final String username = "sth@gmail.com";
private static final String password = "pass";


private void sendMail(String email, String subject, String messageBody) {
        Session session = createSessionObject();

        try {
            Message message = createMessage(email, subject, messageBody, session);
            new SendMailTask().execute(message);
        } catch (AddressException e) {
            e.printStackTrace();
        } catch (MessagingException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }

    private Message createMessage(String email, String subject, String messageBody, Session session) throws MessagingException, UnsupportedEncodingException {
        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress("sth@gmail.com"));
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(email, email));
        message.setSubject(subject);
        message.setText(messageBody);
        return message;
    }

    private Session createSessionObject() {
        Properties properties = new Properties();
        properties.put("mail.smtp.auth", "true");
        properties.put("mail.smtp.starttls.enable", "true");
        properties.put("mail.smtp.host", "smtp.gmail.com");
        properties.put("mail.smtp.port", "587");

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

    private class SendMailTask extends AsyncTask<Message, Void, Void> {
        private ProgressDialog progressDialog;

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            progressDialog = ProgressDialog.show(SendQuestion.this, "Please wait", "Sending mail", true, false);
        }

        @Override
        protected void onPostExecute(Void aVoid) {
            super.onPostExecute(aVoid);
            progressDialog.dismiss();
        }

        @Override
        protected Void doInBackground(Message... messages) {
            try {
                Transport.send(messages[0]);
            } catch (MessagingException e) {
                e.printStackTrace();
            }
            return null;
        }
    }

Eclipse拋出javax.mail.AuthenticationFailedException。 當我第一次嘗試發送郵件時，我的gmail帳戶收到了Google發出的有關安全性的郵件，並阻止了該郵件。 然后，我在/ lesssecureapps激活，我希望允許安全性較低的應用程序。 但這並沒有解決。 我的代碼有問題嗎？還是有Gmail問題？

PS：我已經添加了所有必需的.jar並包括了Internet訪問以顯示清單

Answer 1

嘗試這樣做：

public static int Email(String fromemail, String toemail, String cc,
            String bcc, String Subject, String Body, String Attachment) {
        final String fromEmail = fromemail;// "user@gmail.com"; //requires
        // valid gmail id
        // final String password = Password; // correct password for gmail id
        final String toEmail = toemail;// "user2@ymail.com"; // can be any
        // email id

        MailSSLSocketFactory sf = null;
        try {
            sf = new MailSSLSocketFactory();
        } catch (GeneralSecurityException e) {
            e.printStackTrace();
        }
        sf.setTrustAllHosts(true);

        Properties props = new Properties();
        props.put("mail.smtp.host", "smtp.gmail.com"); // SMTP Host
        props.put("mail.smtp.socketFactory.port", "465"); // SSL Port
        props.put("mail.smtp.socketFactory.class",
                "javax.net.ssl.SSLSocketFactory"); // SSL Factory Class
        props.put("mail.smtp.auth", "true"); // Enabling SMTP Authentication
        props.put("mail.smtp.port", "465"); // SMTP Port

        Authenticator auth = new Authenticator() {
            // override the getPasswordAuthentication method
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(fromEmail, Password);
            }
        };

        Session session = Session.getDefaultInstance(props, auth);

        int i;
        i = sendEmail(session, toEmail, Subject, Body);
        return i;

    }

這是發送功能：

public static void sendEmail(Session session, String toEmail,
            String subject, String body) {
        try {
            MimeMessage msg = new MimeMessage(session);
            // set message headers
            msg.addHeader("Content-type", "text/HTML; charset=UTF-8");
            msg.addHeader("format", "flowed");
            msg.addHeader("Content-Transfer-Encoding", "8bit");

            msg.setFrom(new InternetAddress("no_reply@journaldev.com",
                    "Operation Department Email"));

            msg.setReplyTo(InternetAddress.parse("no_reply@journaldev.com",
                    false));

            msg.setSubject(subject, "UTF-8");

            msg.setText(body, "UTF-8");

            msg.setSentDate(new Date());

            msg.setRecipients(Message.RecipientType.TO,
                    InternetAddress.parse(toEmail, false));
            Transport.send(msg);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

Answer 2

事實證明，這是Google服務器的問題。 我與支持人員聯系，他們將其修復。 上面的代碼可以正常工作。