A securities company has established over 40 branches and 100 business departments in more than 100 cities and regions across the country. Its business scope covers: securities brokerage, securities investment consulting, financial advising relating to securities transaction or securities investment, underwriting and recommendation of securities, securities proprietary, and securities assets management, securities margin trading, the securities investment funds and financial product consignment, introducing broker for futures companies, securities investment fund custody, stock option marketing.

The securities company's mail system plays a key role in enterprise internal communicating and key information conveying. With enterprise's business development, its mail system pressure becomes increasingly heavy. As mail server is a standalone server, any unexpected downtime would bring inconvenience to the enterprise’s daily work, and even cause heavy losses. Therefore, high availability protection on mail system is needed urgently, in order to guarantee mail server runs 7×24 hours continuously.