javamail使用SSL加密方式465端口

 目前使用javamail發送郵件通常使用25端口,因爲25端口是一個簡單的郵件發送協議,因此常常會被濫用發送垃圾郵件,所以在一些服務器好比阿里雲上會封禁該端口的使用.

解決的辦法就是使用465端口:465端口是爲SMTPS（SMTP-over-SSL）協議服務開放的，這是SMTP協議基於SSL安全協議之上的一種變種協議，它繼承了SSL安全協議的非對稱加密的高度安全可靠性，可防止郵件泄露。SMTPS和SMTP協議同樣，也是用來發送郵件的，只是更安全些，防止郵件被黑客截取泄露，還可實現郵件發送者抗抵賴功能。防止發送者發送以後刪除已發郵件，拒不認可發送過這樣一份郵件。

package com.diannuo.util.emailUtil;

import java.security.Security;
import java.util.Date;
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.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class MailBySSL{
	public static boolean sendMailBySSL() throws AddressException, MessagingException{
		  Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
		  final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
		  // Get a Properties object
		  Properties props = new Properties();
		  props.setProperty("mail.smtp.host", "smtp.163.com");
		  props.setProperty("mail.smtp.socketFactory.class", SSL_FACTORY);
		  props.setProperty("mail.smtp.socketFactory.fallback", "false");
		  props.setProperty("mail.smtp.port", "465");
		  props.setProperty("mail.smtp.socketFactory.port", "465");
		  props.put("mail.smtp.auth", "true");
		  final String username = "506865679@163.com";
		  final String password = "xxxxxxx";
		  Session session = Session.getDefaultInstance(props, new Authenticator(){
		      protected PasswordAuthentication getPasswordAuthentication() {
		          return new PasswordAuthentication(username, password);
		      }});
		 
		       // -- Create a new message --
		  Message msg = new MimeMessage(session);
		 
		  // -- Set the FROM and TO fields --
		  msg.setFrom(new InternetAddress("506865679@163.com"));
		  msg.setRecipients(Message.RecipientType.TO, 
		    InternetAddress.parse("506865679@qq.com",false));
		  msg.setSubject("你好,這是來自本地11111服務器");
		  msg.setText("來自測試郵件");
		  msg.setSentDate(new Date());
		  Transport.send(msg);
		  
		  System.out.println("Message sent.");
		  return true;
		 }
}

 

發送至多人郵箱:

package com.diannuo.util.emailUtil;

import java.io.IOException;
import java.io.InputStream;
import java.security.Security;
import java.util.Date;
import java.util.Properties;

import javax.mail.Address;
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.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class MailBySSL{
	private static Properties p = new Properties();
	private static InputStream is = MailBySSL.class
			.getResourceAsStream("/config.properties");
	
	
	
	public static boolean sendMailBySSL(String sender,String text) throws AddressException, MessagingException, IOException{
		  Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
		  final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
		  // Get a Properties object
		  Properties props = new Properties();
		  props.setProperty("mail.smtp.host", "smtp.163.com");
		  props.setProperty("mail.smtp.socketFactory.class", SSL_FACTORY);
		  props.setProperty("mail.smtp.socketFactory.fallback", "false");
		  props.setProperty("mail.smtp.port", "465");
		  props.setProperty("mail.smtp.socketFactory.port", "465");
		  props.put("mail.smtp.auth", "true");
		  
		  p.load(is);
		  final String username = p.getProperty("userName");
		  final String password = p.getProperty("password");
		  Session session = Session.getDefaultInstance(props, new Authenticator(){
		      protected PasswordAuthentication getPasswordAuthentication() {
		          return new PasswordAuthentication(username, password);
		      }});
		 
		  // 建立郵件
		  Message msg = new MimeMessage(session);
		 
		  // 設置發件人和收件人
		  msg.setFrom(new InternetAddress(p.getProperty("userName")));
		  
		  // 多個收件人地址
		  String[] add = p.getProperty("receiver").split(",");
		  Address[] addArr =  new InternetAddress[add.length];
		  for(int i=0;i<add.length;i++){
			  addArr[i] = new InternetAddress(add[i]);
		  }
		  
		  msg.setRecipients(Message.RecipientType.TO, addArr);
		  msg.setSubject(sender); // 標題
		  msg.setText(text);// 內容
		  msg.setSentDate(new Date());
		  Transport.send(msg);
		  
		  return true;
		 }
}