Users can set a time period after which a message can no longer be read. The system consists of client software, which is currently available for Microsoft Outlook, and a service that resides on Disappearing's servers. Once the message has expired, the key that opens the message is deleted from its server. The company last week revealed plans to develop a version of the software for Lotus Notes. Disappearing also offers a developers' kit that lets users port the system to other mail clients.
Users can download a free trial copy of the client software from the company's Web site.
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