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Tumbleweed Communications on Tuesday announced new software for companies wanting to encrypt their e-mail that stays inside the organization.

Called MailGate Desktop Messenger, the new software integrates with e-mail clients such as Microsoft’s Outlook to give users one-button access to encryption, says Dan Maier, director of product marketing with Tumbleweed.

Because of the rise in internal threats as well as the increase in regulations specifying which employee at a company can view certain data, enterprises are looking to safeguard not only communications leaving the organization, but also e-mails being sent within the network, Maier says.

The new desktop software works with Tumbleweed’s Secure Messenger that encrypts messages that are being sent outside the network at an organization’s gateway. It lets administrators set policies regarding what types of messages should be encrypted, and redirect unencrypted messages that should have been secured, Maier says.

Slated for availability in March, Desktop Messenger will start at US$5,000 per 100 users.