如何使用java从Web服务器发送电子邮件。使用Gmail服务器发送邮件

Question

我试图发送电子邮件使用gmail smtp使用javax.mail.下面是我的代码

 public static void send(String from,String password,String to,String sub,String msg){  
      //Get properties object    
      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");    
      //get Session   
      Session session = Session.getDefaultInstance(props,    
       new javax.mail.Authenticator() {    
       protected PasswordAuthentication getPasswordAuthentication() {    
       return new PasswordAuthentication(from,password);  
       }    
      });    
      //compose message    
      try {    
       MimeMessage message = new MimeMessage(session);    
       message.addRecipient(Message.RecipientType.TO,new InternetAddress(to));    
       message.setSubject(sub);    
       message.setText(msg);    
       //send message  
       Transport.send(message);    
       System.out.println("message sent successfully");    
      } catch (MessagingException e) {throw new RuntimeException(e);}    

}  

代码工作正常当我在本地服务器上运行它时，但当我尝试在Elastic beanstek上运行它时（我的服务器在AWS EBS上运行），身份验证失败异常即将到来注意：我已打开从Google A/c设置访问不太安全的应用程序，但我仍然收到此错误

javax.mail.身份验证失败异常：534-5.7.14请通过您的网络浏览器登录，然后重试。534-5.7.14了解更多信息，请访问534 5.7.14https://support.google.com/mail/answer/78754l13sm3053341iti6-gsmtp

Answer 1

请试试这个

public static void sendPDFReportByGMail(String from, String pass, String to, String subject, String body) {
    Properties props = System.getProperties();
    String host = "smtp.gmail.com";
    props.put("mail.smtp.starttls.enable", "true");
    props.put("mail.smtp.host", host);
    props.put("mail.smtp.user", from);
    props.put("mail.smtp.password", pass);
    props.put("mail.smtp.port", "587");
    props.put("mail.smtp.auth", "true");

    Session session = Session.getInstance(props, new javax.mail.Authenticator() {
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(from, pass);
        }
    });

    MimeMessage message = new MimeMessage(session);

    try {
        // Set from address
        message.setFrom(new InternetAddress(from));
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
        // Set subject
        message.setSubject(subject);
        // Set Mail body
        message.setText(body);

        BodyPart objMessageBodyPart = new MimeBodyPart();

        objMessageBodyPart.setText(body);

        Transport transport = session.getTransport("smtp");
        transport.connect(host, from, pass);
        transport.sendMessage(message, message.getAllRecipients());
        transport.close();
    } catch (AddressException ae) {
        ae.printStackTrace();
    } catch (MessagingException me) {
        me.printStackTrace();
    }
}

Answer 2

我最近遇到的同样问题，我发现问题是EC2区域。Google不允许从用户的非频繁位置登录较少的安全应用程序。您可以使用Google Mail API或使用其他一些邮件平台，例如Yahoo。检查您的EC2实例区域。尝试使用yahoo mail执行代码，在Elastic beanstek或您使用的任何环境上部署它。这对我有用。

public void yahooSend(String mail,String subject,String msg) {

        // Sender's email ID needs to be mentioned
         String from = "YOUR_YAHOO_MAIL";
         String pass ="YOUR_YAHOO_PASSWORD";
        // Recipient's email ID needs to be mentioned.
       String to = mail;
       String host = "smtp.mail.yahoo.com";

       // Get system properties
       Properties properties = System.getProperties();
       // Setup mail server
       properties.put("mail.smtp.starttls.enable", "true");
       properties.put("mail.smtp.host", host);
       properties.put("mail.smtp.user", from);
       properties.put("mail.smtp.password", pass);
      // props.put("mail.smtp.user", "YAHOO_USER_NAME"); 
       properties.put("mail.smtp.port", "587");
       properties.put("mail.smtp.auth", "true");


       // Get the default Session object.
       Session session = Session.getDefaultInstance(properties);

       try{
          // Create a default MimeMessage object.
          MimeMessage message = new MimeMessage(session);

          // Set From: header field of the header.
          message.setFrom(new InternetAddress(from));

          // Set To: header field of the header.
          message.addRecipient(Message.RecipientType.TO,
                                   new InternetAddress(to));

          // Set Subject: header field
          message.setSubject(subject);

          // Now set the actual message
          message.setText(msg);
          System.out.print("Sending msg "+msg);
          // Send message
          Transport transport = session.getTransport("smtp");
          transport.connect(host,587, from, pass);
          transport.sendMessage(message, message.getAllRecipients());
          transport.close();
         System. out.println("Sent message successfully....");
       }catch (MessagingException mex) {
           System. out.print(mex);
          mex.printStackTrace();
       }
 }