EntourageGPG Preferences 1.0Free
EntourageGPG is a front end for GPG inside Microsoft Entourage. GPG, or GNU Privacy Guard, is an OpenPGP-compatible free public key encryption tool.
For both new and old users, it is extremely important that you set up the cleanup script to run as a schedule, run it yourself before closing Entourage or leaving your computer unattended, and/or set the preferences to show decrypted messages in a new window. Otherwise, decrypted messages are saved to the disk by Entourage, which is not a good thing.