Staring at the "Loose Lips Sinks Ships" sign, you've had everyone who's walked through your door sign a NDA and haven't even told your wife what exactly you do from seven to seven every day. How can you sleep at night, though, when you can't ensure that your confidential emails will never leave your building?

Microsoft today announced a partnership with San Francisco-based Disappearing Inc., a provider of corporate e-policy management systems, to help companies evaluate, implement and monitor email policies across the enterprise.

Disappearing Email for Microsoft Outlook is a plug-in that allows the corporate user to email messages and attachments that self-destruct at a time specified by the user or the user's corporate email policy.

"As a greater number of business documents today are housed in email archives, we believe the benefits provided by Disappearing Email are increasingly important to companies concerned about email retention," said Jeff Olund, general manager, Microsoft Office. "Disappearing Inc. has done an excellent job integrating its software with Microsoft Outlook."

As a Microsoft eServices partner, Disappearing Email will be added to the Microsoft Office XP toolbar link that connects customers to different Web services. In addition, Disappearing Inc. has implemented the Microsoft Passport Single Sign-in Service to its Web site registration process.