Here we'll illustrate how to get Enigmail up and running.

As a first step, if you don't already use it, you need a mail client (Postbox, SeaMonkey or Epyrus).

Second, you need the Enigmail extension. How to install these two will be covered in the next paragraphs.

As a third and fundamental requirement you need GnuPG which will be used to perform all cryptographic operations. If it is not installed on your system (or Enigmail cannot access it), the Setup Wizard will offer to download and install it for you.

Mail Client install

First, download PostboxSeaMonkey or Epyrus.

For configuring Postbox or Interlink, we recommend you check the corresponding documentation.

In any case, you should have fully configured your mail client and your email account before proceeding to the installation of Enigmail.

Enigmail install

Automatic install

Postbox: please use the Manual installation described below.

Interlink: You can install Enigmail just like any other add-on through the Add-ons Manager.

Open the menu and select Add-ons:


You can now select Enigmail from Extensions, or click on Search and search for it. Once you've found it, click on Install:


You will get a confirmation dialog warning you not to download software from unknown sources. However, the Interlink Mail & News site can be trusted and you can safely confirm. After installing the extension, you have to restart Interlink to activate it.

Manual install

  1. Download the Enigmail XPI file through the download page and save it to your disk.
  2. Open the Add-On manager:
    Postbox: Use the to level menu bar:Tools → Labs.
    Interlink: click on the Hamburger menu and select Add-Ons.
  3. To install a downloaded XPI file, drag and drop it to the Add-ons / Labs Manager, or use the menu item in the upper right corner: Install Add-on from file.