windows server 2012 创建安装SMTP

参考 ：

安装SMTP

http://blog.powerbiz.net.au/exchange/how-to-set-up-an-internal-smtp-service-for-windows-server-2012-essentials/

测试安装是否成功

http://www.simplescripts.de/smtp-check-port-25-telnet-command.htm