无法使用Javamail通过SSL或TLS使用SMTP发送邮件

Question

新年快乐！

我正在开发一个应用程序，用户只要发生特定触发器就会收到电子邮件。

这是我用来发送电子邮件的功能：

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，每当我尝试使用main方法运行上述代码时，它都会成功发送SSL和TLS协议的电子邮件。

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();
        } 
    }

但每当我尝试通过我的Web应用程序运行相同的代码时它就会失败。

通过SSL发送它会引发此错误：

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)

通过TLS发送会抛出此错误：

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)

任何形式的帮助表示赞赏。

EDIT1：

这是前端的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>

值将保存在配置文件中，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())
  }

这是设置和获取属性的类：

https://codeshare.io/5G8ki

谢谢。

Answer 1

你的代码看起来还不错，至少有一个大问题。 您正尝试对TLS和SSL使用相同的端口（587）。 我不确定TLS，但如果您将请求发送到端口465，则SSL代码应该有效。如此处所写（google FAQ） ：

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

他们有自己的特定端口。 您获得的SSL错误：

Unrecognized SSL message, plaintext connection?

您的客户端是否了解它收到非SSL编码响应的事实（由于TLS端口未实现SSL）。

Answer 2

我们为TLS设置了更多属性

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");

对于Auth使用smtps而不是smtp

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

在获得运输时

session.getTransport("smtps"); 

连接时再次传递主机电子邮件和密码

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

用于调试

session.setDebug(true);

Answer 3

请尝试以下适用于我的代码。

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中有一个更新安全性。 您必须在https://myaccount.google.com/security?pli=1页面中选择“允许安全性较低的应用程序访问”选项。 然后，您可以毫无问题地从您的帐户发送邮件

Answer 5

simple-java-mail有一个简单的枚举，可用于表示SSL或TLS。 您无需担心这种方式的正确属性：

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);

如果您启用了双因素登录，则需要从Google帐户生成应用程序专用密码才能使此示例正常运行。