javamail使用SSL加密方式465端口

 目前使用javamail发送邮件通常使用25端口,因为25端口是一个简单的邮件发送协议,因此常常会被滥用发送垃圾邮件,所以在一些服务器好比阿里云上会封禁该端口的使用.

解决的办法就是使用465端口:465端口是为SMTPS（SMTP-over-SSL）协议服务开放的，这是SMTP协议基于SSL安全协议之上的一种变种协议，它继承了SSL安全协议的非对称加密的高度安全可靠性，可防止邮件泄露。SMTPS和SMTP协议同样，也是用来发送邮件的，只是更安全些，防止邮件被黑客截取泄露，还可实现邮件发送者抗抵赖功能。防止发送者发送以后删除已发邮件，拒不认可发送过这样一份邮件。

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,这是来自本地11111服务器");
		  msg.setText("来自测试邮件");
		  msg.setSentDate(new Date());
		  Transport.send(msg);
		  
		  System.out.println("Message sent.");
		  return true;
		 }
}

 

发送至多人邮箱:

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);
		      }});
		 
		  // 建立邮件
		  Message msg = new MimeMessage(session);
		 
		  // 设置发件人和收件人
		  msg.setFrom(new InternetAddress(p.getProperty("userName")));
		  
		  // 多个收件人地址
		  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); // 标题
		  msg.setText(text);// 内容
		  msg.setSentDate(new Date());
		  Transport.send(msg);
		  
		  return true;
		 }
}