java发邮件，这个坑你能填吗？

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正文
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今天利用java发邮件，本地windows上测试时发送ok的，部署到服务器上却报异常，让我们走进异常，探索到底坑在哪里，并填之。

利用outlook发邮件代码如下：


package com.website.service.impl;

import com.alibaba.fastjson.JSON;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;

import javax.mail.internet.MimeMessage;
import java.util.Properties;

/**
* @program: WebSite
* @description: SpringMvc实现的发送email
* @author: smallsoup
* @create: 2018-06-30 20:29
**/
public class EmailServiceImpl {

   private static final Logger LOGGER = LoggerFactory.getLogger(Test.class);

   @Autowired
   @Qualifier("javaMailSender")
   private JavaMailSenderImpl sender;

   /**
    * @方法名: sendMail
    * @参数名：@param subject  邮件主题
    * @参数名：@param content 邮件内容
    * @参数名：@param to     收件人Email地址
    * @描述语: 发送邮件
    */
   public void sendMailHtml(String to, String subject, String content) throws Exception {

       sender.setUsername("yourusername@outlook.com");
       sender.setPassword("your_password");
       sender.setPort(587);

       Properties props = new Properties();
       props.setProperty("mail.transport.protocol", "smtp");
       props.setProperty("mail.smtp.host", "smtp-mail.outlook.com");
       props.setProperty("mail.smtp.starttls.enable", "true");
       props.setProperty("mail.smtp.auth", "true");
       props.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
       props.setProperty("mail.smtp.socketFactory.port", "587");
       props.setProperty("mail.smtp.socketFactory.fallback", "true");
       props.setProperty("mail.smtp.auth.ntlm.domain", "THING");

       sender.setJavaMailProperties(props);

       //建立邮件消息,发送简单邮件和html邮件的区别
       MimeMessage mailMessage = sender.createMimeMessage();
       MimeMessageHelper messageHelper = new MimeMessageHelper(mailMessage);

       messageHelper.setFrom("smallsoup@outlook.com");

       //用于接收邮件的邮箱
       messageHelper.setTo(to);
       //邮件的主题
       messageHelper.setSubject(subject);
       //邮件的正文，第二个boolean类型的参数代表html格式
       messageHelper.setText(content, true);

       LOGGER.info("----------sendMailHtml-----------------");
       LOGGER.info("----------mailMessage is------------FROM:{}, Subject:{}, content:{}, AllRecipients:{}", mailMessage.getFrom(), mailMessage.getSubject(), mailMessage.getContent(), JSON.toJSONString(mailMessage.getAllRecipients()));
       //发送
       sender.send(mailMessage);
   }
}