p7mViewer 4.5 displays the contents of smime.p7m files and other files with file extension p7m, encrypted or signed in the S/MIME standard. It gives easy access to encrypted or signed email messages in web-based mail clients, encrypted e-mail attachments, signed documents and secure file archives.

Eudora S/MIME Plugin enables Eudora users to send and receive S/MIME messages. With administrative tasks reduced to the minimum and the intuitive wizards' guidance, the plugin is easy to use even by an inexperienced user.