Mailvelope is an extension to encrypt and decrypt emails directly into your mail provider (Chrome and Firefox support only).

The following mail providers are supported:

• Gmail™
• GMX™
• Outlook.com™
• Posteo™
• WEB.DE™
• Yahoo!™

Here is how to install and configure your Mailvelope:

Open your Chrome browser and click on Window and Extensions
Click on Get more extensions
Look for Mailvelope
Add to Chrome
Here you can see your installed Mailvelope in the main Google Chrome toolbar
Click on the lock icon and open the Options menu.
Open Generate Key
Generate your own key pair
Your key pair was generated
Here is your generated key pair
Look for the public key of your recipient (https://pgp.mit.edu/) and insert the public key for the recipient you want to send
Public key was imported
Just log in to your account e.g. web.de Freemail and click on the compose button (pen icon)
Write your email and click on Encrypt.

Add the recipient you want to write an encrypted email.
Now you can see your encrypted email. Just click on Transfer to put it in your webmail window.
Your encrypted email in your webmail window. Click on Send to mail your encrypted email.

If your recipient receives an encrypted email, you will only see coded text.
Mailvelope marks it with an overlay when your mouse hovers the coded text.
If you want to decrypt the coded text, click on the envelope and type in your password to decrypt it.
Now you can see the decrypted message.