javamail使用SSL加密方式465端口

目前使用javamail发送邮件一般使用25端口,由于25端口是一个简单的邮件发送协议,所以经常会被滥用发送垃圾邮件,因此在一些服务器比如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协议一样，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。防止发送者发送之后删除已发邮件，拒不承认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);
}});

// 创建邮件
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;
}
}