code: public static void sendMail(MailHost mailHost, String personal, String to, String title, String content,
                                  final String from, final String key) throws Exception {
          setHost(mailHost);
          setPersonal(personal);
          sendMail(to, title, content, from, key);
      }
docs: 发送邮件
  
  @param mailHost 邮件服务器
  @param personal 个人名称
  @param to 收件箱
  @param title 标题
  @param content 内容
  @param from 收件箱
  @param key 密码
  
  @throws Exception 异常