Java 使用Gmail Smtp发送邮件时出现异常？

我正在尝试使用Gmail smtp服务器发送邮件

package com;

import java.util.Properties;

import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class Email {
public static void main(String[] args) {
    try 
    {
    String host = "smtp.gmail.com";
    final String from = "myuname@gmail.com";
    final String pass = "mypassword";
    Properties props = System.getProperties();
    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");

    String[] to = {"to@gmail.com"}; 

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

    InternetAddress[] toAddress = new InternetAddress[to.length];

    // To get the array of addresses
    for( int i=0; i < to.length; i++ ) { 
        toAddress[i] = new InternetAddress(to[i]);
    }
    System.out.println(Message.RecipientType.TO);

    for( int i=0; i < toAddress.length; i++) { 
        message.addRecipient(Message.RecipientType.TO, toAddress[i]);
    }
    message.setSubject("sending in a group");
    message.setText("Welcome to JavaMail");
    Transport transport = session.getTransport("smtp");
    transport.connect(host, from, pass);
    transport.sendMessage(message, message.getAllRecipients());
    transport.close();
    }catch (Exception e) {
        System.out.println(e);
    }
}
}

如何删除此错误？

---

提前感谢。

一个更简单的选择是使用apache commons邮件

import org.apache.commons.mail.*;

Email email = new SimpleEmail();
email.setHostName("smtp.googlemail.com");
email.setSmtpPort(465);
email.setAuthenticator(new DefaultAuthenticator("username", "password"));
email.setSSL(true);
try{
email.setFrom("yourID@gmail.com");
email.setSubject("hello");
String s="hi"
email.setMsg(s);
email.addTo(id);
email.send();

---

我想问题出在我的电子邮件Id上。 我创建了一个新的，它正在工作

---

谢谢大家。

这可能是重复的吗？你真的能连接到smtp.gmail.com 587吗？试试telnet smtp.gmail.com 587？防火墙规则可能会阻止连接。@beny23我可以在哪里运行此命令telnet？？您是否有实际的smtp客户端连接到此服务器？我不知道。我正在从

import org.apache.commons.mail.*;

Email email = new SimpleEmail();
email.setHostName("smtp.googlemail.com");
email.setSmtpPort(465);
email.setAuthenticator(new DefaultAuthenticator("username", "password"));
email.setSSL(true);
try{
email.setFrom("yourID@gmail.com");
email.setSubject("hello");
String s="hi"
email.setMsg(s);
email.addTo(id);
email.send();