Using Self-Signed S/MIME Certificates in Thunderbird
How to install and use self-signed S/MIME digital certificates in Thunderbird for e-mail digital signatures and encryption.
OpenSSL
Using Self-Signed S/MIME Certificates in Outlook
How to install and use self-signed S/MIME digital certificates in Microsoft Outlook for e-mail digital signatures and encryption.
Using Self-Signed S/MIME Certificates in iOS Mail App
How to install and use self-signed S/MIME digital certificates in iOS Mail app for e-mail digital signatures and encryption.
Create Self-Signed S/MIME Certificates
How to create self-signed S/MIME certificates to sign and encrypt e-mail for free.