Try Penango for Google Apps!
Penango is the world's only solution for 100% end-to-end encryption and authentication without gateways for Google Apps. Built on the S/MIME standard, Penango is used by enterprises, governments, militaries, and nonprofit organizations, and is interoperable with recipients and senders who are using Outlook, Eudora, Thunderbird, Apple Mail, and more. With Penango, you can enjoy the convenience of webmail and the security of standards-based cryptography.
Using free Gmail or free Google Apps? You can use Penango for free!
Sign up below to request a free 14-day trial of Penango for Google Apps or buy Penango for only $21.95/year/e-mail account.