如果需要提供用户名和密码给e-mail服务器来达到用户认证的目的，你可以通过如下设置来完成：

props.put("mail.smtp.auth", "true");

props.setProperty("mail.user", "myuser");

props.setProperty("mail.password", "mypwd");

e-mail其他的发送机制和上述保持一致。

需要用户名密码验证邮件发送实例:

本实例以 QQ 邮件服务器为例，你需要在登录QQ邮箱后台在"设置"=》账号中开启POP3/SMTP服务 ，

// 关于QQ邮箱，还要设置SSL加密，加上以下代码即可

MailSSLSocketFactory sf = new MailSSLSocketFactory();

sf.setTrustAllHosts(true);

props.put("mail.smtp.ssl.enable", "true");

props.put("mail.smtp.ssl.socketFactory", sf);

参考消息：

import java.security.GeneralSecurityException;

import java.util.Properties;

import javax.mail.Authenticator;

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;

import com.sun.mail.util.MailSSLSocketFactory;

public class SendEmail

{

public static void main(String [] args) throws GeneralSecurityException

{

// 收件人电子邮箱

String to = "XXXXX@qq.com";

// 发件人电子邮箱

String from = "XXXXXX@qq.com";

// 指定发送邮件的主机为 smtp.qq.com

String host = "smtp.qq.com"; //QQ 邮件服务器

// 获取系统属性

Properties properties = System.getProperties();

// 设置邮件服务器

properties.setProperty("mail.smtp.host", host);

properties.put("mail.smtp.auth", "true");

MailSSLSocketFactory sf = new MailSSLSocketFactory();

sf.setTrustAllHosts(true);

properties.put("mail.smtp.ssl.enable", "true");

properties.put("mail.smtp.ssl.socketFactory", sf);

// 获取默认session对象

Session session = Session.getDefaultInstance(properties,new Authenticator(){

public PasswordAuthentication getPasswordAuthentication()

{

return new PasswordAuthentication("647976802@qq.com", "授权的 QQ 邮箱密码"); //发件人邮件用户名、密码

}

});

try{

// 创建默认的 MimeMessage 对象

MimeMessage message = new MimeMessage(session);

// Set From: 头部头字段

message.setFrom(new InternetAddress(from));

// Set To: 头部头字段

message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));

// Set Subject: 头部头字段

message.setSubject("This is the Subject Line!");

// 设置消息体

message.setText("This is actual message");

// 发送消息

Transport.send(message);

System.out.println("Sent message successfully....from runoob.com");

}catch (MessagingException mex) {

mex.printStackTrace();

}

}

}