Question

我想知道为什么以下基本的java邮件程序无效，因为我没有得到任何错误，因为程序执行得很好。有什么我做错了吗？任何帮助将不胜感激。我还想补充一点，我也尝试使用错误的用户名和密码组合，但仍然没有错误，程序运行完全正常。

public class emailfromgmail {

 public static void main(String[]args)
 {
    final String from = "username";
    final String pass = "password";
    String to = "recipient@gmail.com";
    String host="smtp.gmail.com";
    String subject = "java Mail";
    String body = "example of java mail api using gmail smtp";

 //get the session object

      Properties p = System.getProperties();
      p.put("mail.smtp.starttls.enable","true");
      p.put("mail.smtp.host",host);
      p.put("mail.smtp.user",from);
      p.put("mail.smtp.password",pass );
      p.put("mail.smtp.port", "587");
      p.put("mail.smtp.auth","true");

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

    try{
        MimeMessage msg = new MimeMessage(session);
        msg.setFrom(new InternetAddress(from));
        msg.addRecipient(Message.RecipientType.TO,new InternetAddress(to));
        msg.setSubject(subject);
        msg.setText(body);

        Transport.send(msg);
        System.out.print("message sent successfully");

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

    }     
 }
}

Answer 1

我遇到了同样的问题 - 我运行了我的程序并在各个地方放置了一个对话框，看看它停止了做什么。我仍然不知道出了什么问题，但我尝试了一种完全不同的方法而且它有效。我通过SSL发送，而不是通过TLS发送。我用过这个网站：

https://www.mkyong.com/java/javamail-api-sending-email-via-gmail-smtp-example/

他们的TLS没有用 - 当我跑它时它什么也没做。他们的SSL就像一个魅力！

以下是代码：

＆＃13;

package com.mkyong.common;

import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class SendMailSSL {
	public static void main(String[] args) {
		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("username","password");
				}
			});

		try {

			Message message = new MimeMessage(session);
			message.setFrom(new InternetAddress("from@no-spam.com"));
			message.setRecipients(Message.RecipientType.TO,
					InternetAddress.parse("to@no-spam.com"));
			message.setSubject("Testing Subject");
			message.setText("Dear Mail Crawler," +
					"\n\n No spam to my email, please!");

			Transport.send(message);

			System.out.println("Done");

		} catch (MessagingException e) {
			throw new RuntimeException(e);
		}
	}
}

＆＃13;

简单的Java邮件程序不起作用？

1 个答案: