jar下載：mail.jar

package email;

import java.io.*;
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;

public class SendEmail {
    
    public static void main(String[] args) throws Exception  {
    	
        String email_receive_qq = "[email protected]";	    //收件人
        String email_send_qq = "
 
[email protected]";         //發件人
        
        String email_receive_163 = "[email protected]"；  //收件人
        String email_send_163 = "[email protected]";      //發件人
        
        //主機名
        String host_qq = "smtp.qq.com";
        String host_163 = "smtp.163.com";
        
        //授權碼
        String pwd_qq = "dthflvqsezbtfjib";
        String pwd_163 = "123456abcdef";
        
        //郵件內容
        String content = "111";                             
        
    	sendMail(email_send_163,email_receive_163,content,host_163,pwd_163);
    	sendMail(email_send_qq,email_receive_qq,content,host_qq,pwd_qq);
        
    }
	private static void sendMail(String email_send,String email_receive,String content,String host,String pwd) throws MessagingException, AddressException, NoSuchProviderException {
		Properties properties = new Properties();
        properties.put("mail.transport.protocol", "smtp");// 連線協議
        properties.put("mail.smtp.host",host); // 主機名
        properties.put("mail.smtp.port", 465);// 埠號
        properties.put("mail.smtp.auth", "true");
        properties.put("mail.smtp.ssl.enable", "true");// 設定是否使用ssl安全連線 ---一般都使用
        properties.put("mail.debug", "true");// 設定是否顯示debug資訊 true 會在控制檯顯示相關資訊
        // 得到回話物件
        Session session = Session.getInstance(properties);
        // 獲取郵件物件
        Message message = new MimeMessage(session);
        // 設定發件人暱稱
        String nick="";
        try {
            nick=javax.mail.internet.MimeUtility.encodeText("發件人暱稱");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        message.setFrom(new InternetAddress(nick+" <"+email_send+">"));
        // 設定收件人郵箱地址
        //message.setRecipients(Message.RecipientType.TO, new InternetAddress[]{new InternetAddress("
 
[email protected]"),new InternetAddress("[email protected]"),new InternetAddress("[email protected]")});
        message.setRecipient(Message.RecipientType.TO,new InternetAddress(email_receive));//一個收件人
        // 設定郵件標題
        message.setSubject("郵件標題");
        // 設定郵件內容及格式
        message.setContent(content,"text/html;charset=utf-8");
        // 得到郵差物件
        Transport transport = session.getTransport();
        // 連線自己的郵箱賬戶
        transport.connect(email_send, pwd);// 密碼為郵箱開通的stmp服務後得到的客戶端授權碼
        // 傳送郵件
        transport.sendMessage(message, message.getAllRecipients());
        transport.close();
	}
}