Secure emails with S/MIME


This is a step-by-step guide on how to setup and use digital signing and encryption to secure emails. It describes getting and using X.509v3 certificates with S/MIME secured emails.


  1. Understand the basics
  2. Get a certificate for your email address
  3. Export your private key and certificate
  4. Setup your email program and use them
  5. Understand the limitations