JAVA利用网易邮箱smtp服务发送邮件（使用465和25端口）

一、用465端口进行发送

	<dependency>
			<groupId>javax.mail</groupId>
			<artifactId>mail</artifactId>
			<version>1.4.1</version>
		</dependency>

MailUtil.java

package com.qiaojun;

import org.apache.commons.lang.StringUtils;

import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;

/**
 * 用465端口发送邮件
 *
 * @author qiaojun
 * @date 2019/8/12
 */
public class MailUtil {

    private static String USER_NAME = "xxxx@163.com";//发件人

    private static String PASSWORD = "xxxx";//密码

    private static String HOST = "smtp.ym.163.com";

    public static void main(String[] args) {
        sendMail("xxxxsfdsf@163.com", null, "测试标题", "测试内容");
    }

    public static void sendMail(String subject, String content) {
        sendMail(null, null, subject, "content");
    }

    public static void sendMail(String to, String subject, String content) {
        sendMail(to, null, subject, "content");
    }

    /**
     * 发邮件端口改为465
     *
     * @param to      发送人 逗号分开
     * @param cc      抄送人 逗号分开
     * @param content 发送内容
     */
    public static void sendMail(String to, String cc, String subject, String content) {
        if (null == to) {
            return;
        }
        Properties props = new Properties();
        props.put("username", USER_NAME);
        props.put("password", PASSWORD);

        //网易的smtp服务器地址
        props.put("mail.smtp.host", HOST);
        //SSLSocketFactory类的端口
        props.put("mail.smtp.socketFactory.port", "465");
        //SSLSocketFactory类
        props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
        props.put("mail.smtp.auth", "true");
        //网易提供的ssl加密端口,QQ邮箱也是该端口
        props.put("mail.smtp.port", "465");

        Session defaultInstance = Session.getDefaultInstance(props);
        try {
            Session session = Session.getInstance(props, null);
            Message message = new MimeMessage(session);
            message.setFrom(new InternetAddress(props.get