無法使用Javamail通過SSL或TLS使用SMTP發送郵件

Question

新年快樂！

我正在開發一個應用程序，用戶只要發生特定觸發器就會收到電子郵件。

這是我用來發送電子郵件的功能：

public static void sendEmail(String host, String port, String useSSL, String useTLS, String useAuth, String user, String password, String subject, String content, String type, String recipients)
            throws NoSuchProviderException, AddressException, MessagingException  {
        final Properties props = new Properties();
        props.setProperty("mail.transport.protocol", "smtp");
        props.setProperty("mail.smtp.host", host);
        props.setProperty("mail.smtp.port", port);        
        if (useSSL != null && !useSSL.equals("false") && useSSL.equals("true")) {
            props.setProperty("mail.smtp.ssl.enable", useSSL);
            props.setProperty("mail.smtp.socketFactory.class",
                    "javax.net.ssl.SSLSocketFactory");
            props.setProperty("mail.smtp.socketFactory.port", port);

        }
        if (useTLS != null && !useTLS.equals("false") && useTLS.equals("true")) {
            props.setProperty("mail.smtp.starttls.enable", useTLS);
            props.setProperty("mail.smtp.socketFactory.fallback", "true");
        }   
        props.setProperty("mail.smtp.auth", useAuth);
        props.setProperty("mail.from", user);  
        props.setProperty("mail.smtp.user", user);
        props.setProperty("mail.password", password);

        Session mailSession = Session.getDefaultInstance(props, new Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(props.getProperty("mail.smtp.user"), props
                        .getProperty("mail.password"));
            }
        });   

        Transport transport = mailSession.getTransport();

        MimeMessage message = new MimeMessage(mailSession);
        message.setHeader("Subject", subject);
        message.setContent(content, type);

        StringTokenizer tokenizer = new StringTokenizer(recipients, ";");
        while (tokenizer.hasMoreTokens()) {
            String recipient = tokenizer.nextToken();
            message.addRecipient(Message.RecipientType.TO,
                    new InternetAddress(recipient));
        }

        transport.connect();
        transport.sendMessage(message, message.getRecipients(Message.RecipientType.TO));
        transport.close();

奇怪的是，每當我嘗試使用main方法運行上述代碼時，它都會成功發送SSL和TLS協議的電子郵件。

public static void main(String args[])
    {
        try {
            Notifier.sendEmail("smtp.gmail.com", "587", "false", "true", "true","sender_email@gmail.com", "testpassword", "CHECKING SETTINGS", "CHECKING EMAIL FUNCTIONALITY", "text/html", "cc_email@gmail.com");
        } catch (Exception ex) {
            ex.printStackTrace();
        } 
    }

但每當我嘗試通過我的Web應用程序運行相同的代碼時它就會失敗。

通過SSL發送它會引發此錯誤：

com.sun.mail.smtp.SMTPSendFailedException: 530-5.5.1 Authentication Required. Learn more at
jvm 1    | 530 5.5.1  https://support.google.com/mail/answer/14257 f12sm88286300pat.20 - gsmtp
jvm 1    | 
jvm 1    |  at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:2057)

通過TLS發送會拋出此錯誤：

javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 587;
jvm 1    |   nested exception is:
jvm 1    |  javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
jvm 1    |  at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1934)

任何形式的幫助表示贊賞。

EDIT1：

這是前端的tpl文件

<div class="label1"><h3 class="label">Host:</h3></div>
     <div class="field1"><input type="text" class="input1" name="host" size="20" value="$HOST$"></div>
         <div class="port"><h3 class="label">Port:</h3></div>
         <div class="fieldport"><input type="text" class="fieldport" name="port" size="5" value="$PORT$"></div>
         <div class="ssl">
                <input type="radio" name="sslEnable" value="$SSLENABLE$">
                    Enable SSL?
         </div>
         <div class="tls">
                <input type="radio" name="tlsEnable" value="$TLSENABLE$">
                    Enable TLS?
         </div>
         <div class="auth">
                <input type="checkbox" name="auth"$AUTH$>
                    Enable Authentication?
         </div>            
     <div class="label2"><h3 class="label">User:</h3></div>
     <div class="field2"><input type="text" class="input1" name="user" size="20" value="$USER$"></div>
     <div class="label3"><h3 class="label">Password:</h3></div>
     <div class="field3"><input type="password" class="input1" name="password" size="20" value="$PASSWORD$"></div>
     <div class="label4"><h3 class="label">Recipient(s):</h3></div>
     <div class="field4"><input type="text" class="input1" name="recipients" size="50" value="$RECIPIENTS$"></div>

值將保存在配置文件中，如下所示：

host=smtp.gmail.com
port=587
ssl=false
tls=true
auth=true
user=send_user_email@gmail.com
password=O0UbYboDfVFRaiA=
recipients=cc_user_email@gmail.com
trigger1=false
attempt=0
trigger2=false
percent=5
anyOrAll=ANY
trigger3=true
format=HTML
trigger4=true
trigger5=true

EDIT2：

public static void sendEmail(String message)
      throws NoSuchProviderException, AddressException, MessagingException
  {
    if (message == null || message.trim().equals("")) return;

    StringBuffer content = new StringBuffer();
    content.append(getHeader());
    content.append(message);
    content.append(getFooter());
    String format = NotifyProps.getFormat();
    String type = "text/plain";
    if (format.equals(NotifyProps.HTML)) type = "text/html";

    sendEmail(NotifyProps.getHost(), NotifyProps.getPort(), Boolean.toString(NotifyProps.getUseAuth()), Boolean.toString(NotifyProps.getUseSSL()), Boolean.toString(NotifyProps.getUseTLS()),NotifyProps.getUser(), NotifyProps.getPassword(),
              "Transaction Processor Auto Notification", content.toString(), type,
              NotifyProps.getRecipients())
  }

這是設置和獲取屬性的類：

https://codeshare.io/5G8ki

謝謝。

Answer 1

你的代碼看起來還不錯，至少有一個大問題。 您正嘗試對TLS和SSL使用相同的端口（587）。 我不確定TLS，但如果您將請求發送到端口465，則SSL代碼應該有效。如此處所寫（google FAQ） ：

在端口465（使用SSL）和端口587（使用TLS）上配置SMTP服務器[...]

他們有自己的特定端口。 您獲得的SSL錯誤：

Unrecognized SSL message, plaintext connection?

您的客戶端是否了解它收到非SSL編碼響應的事實（由於TLS端口未實現SSL）。

Answer 2

我們為TLS設置了更多屬性

props.put("mail.smtp.starttls.enable", "true");
props.setProperty("mail.smtp.ssl.enable", "true");
props.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.socketFactory.fallback", "false");

對於Auth使用smtps而不是smtp

props.setProperty("mail.smtps.auth", useAuth);

在獲得運輸時

session.getTransport("smtps"); 

連接時再次傳遞主機電子郵件和密碼

transport.connect("smtp.gmail.com", "user@email", "password");

用於調試

session.setDebug(true);

Answer 3

請嘗試以下適用於我的代碼。

public void sendEmail(){

        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("senderEmail@gmail.com","secret");
                }
            });

            try {
            Message message = new MimeMessage(session);
            message.setFrom(new InternetAddress("from-email@gmail.com"));
            message.setRecipients(Message.RecipientType.TO,
                    InternetAddress.parse("to-email@gmail.com"));
            message.setSubject("This is testing message");
            message.setText("Hi this is testing email....not spam");

        Transport.send(message);
            System.out.println("email successfully sent..");

        } catch (MessagingException e) {
            throw new RuntimeException(e);
        }
    }

Answer 4

最近，gmail中有一個更新安全性。 您必須在https://myaccount.google.com/security?pli=1頁面中選擇“允許安全性較低的應用程序訪問”選項。 然后，您可以毫無問題地從您的帳戶發送郵件

Answer 5

simple-java-mail有一個簡單的枚舉，可用於表示SSL或TLS。 您無需擔心這種方式的正確屬性：

Email email = new Email();

(...)

new Mailer("smtp.gmail.com", 25, "your user", "your password", TransportStrategy.SMTP_TLS).sendMail(email);
new Mailer("smtp.gmail.com", 587, "your user", "your password", TransportStrategy.SMTP_TLS).sendMail(email);
new Mailer("smtp.gmail.com", 465, "your user", "your password", TransportStrategy.SMTP_SSL).sendMail(email);

如果您啟用了雙因素登錄，則需要從Google帳戶生成應用程序專用密碼才能使此示例正常運行。