T/bone SecureMail Gateway
T/bone SecureMail Gateway provides digital signatures and encryption for the entire email traffic of a company with a single organizational certificate. It is a server-based solution which works transparently for end users. T/bone automatically finds the certificates of external users or companies via the Internet. Secure email traffic to customers, suppliers, and partners is easily established, no matter whether or not they also deploy T/bone. Packages for Red Hat, SuSE, and Debian GNU/Linux are available for download.