邮件提醒,在开机时如有新的邮件，则提醒你有未阅读的邮件。-Email alerts, at boot time if there is new mail, it reminds you of unread messages.

本程序是为测试一卡通服务器是否可用而写的。定时检测服务器是否可用，如果不可用则发邮件提醒，并记录下错误信息，供查找故障原因。 -This procedure is to test the card and write the server is available. Timing detection server is available, if not available then mail alerts, and record the error message, find out th