4 Email Signing

Scute also allows you to use your card-based X.509 certificate to sign your emails with the S/MIME signature format. This has been tested with Mozilla Thunderbird only, but should work with any mail client with support for PKCS #11 (notably GNOME Evolution).

You must first load the Scute module into your mail client. With Mozilla Thunderbird, the procedure is the same as the one described above for Mozilla Firefox.

Then, open your account configuration dialog (Edit->Account Settings), and in the Security tab, under the section Digital Signing, use the Select... button to associate your card-based certificate with your account.

When writing a new message, you may then use the S/MIME button and select Digitally sign this message in the popup menu. You will be prompted for your User PIN before the message is sent.