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Add PostGuard to your mail client

Using the PostGuard addon for Thunderbird or Outlook, you can send encrypted emails in a breeze!

Install instructions

Download for:

  1. Download and save the file postguard-tb-addon.xpi somewhere on your computer, where you can find it again easily.

  2. Within Thunderbird:

    • under the menu Tools, go to Add-ons and Themes,
    • click on the cog icon next to Manage Your Extensions and select Install Add-on From File ...,
    • a file selection window opens; go to the folder where you stored the file postguard-tb-addon.xpi and select it,
    • Thunderbird tells you what an add-on can do; when you wish to continue, click the Add button.
  3. Now, when you compose a new mail message, a new header is shown with a button to switch PostGuard on or off. When on, it will encrypt the message for all recipients. Each recipient needs to use the Yivi app to prove that (s)he really posesses the email address that you used.