The Thunderbird developers have announced that they will implement OpenPGP support in Thunderbird 78. Support for Thunderbird in Enigmail will therefore be discontinued.

We would like to explain in the following paragraphs what this will mean for Enigmail, and why this is an inevitable step.

The Future of Enigmail

We will continue to support and maintain Enigmail for Thunderbird 68 until 2 months after Thunderbird 91 will have been. Enigmail will not run anymore on Thunderbird 72 beta and newer.

Will this be the end of Enigmail?

No! We will continue to maintain and support Enigmail for Postbox and Interlink Mail & News, which are both running on a different release schedule than Thunderbird for the foreseeable future.

Why Is This Happening?

The Mozilla developers have been and still are actively working on removing old code from their code base. This affects not only Thunderbird itself, but also add-ons. While it was possible for Thunderbird to keep old "legacy" add-ons alive for a certain time, the time has come for Thunderbird to stop supporting them. Thunderbird 78 will no longer to support the APIs that Enigmail requires and only allow new "WebExtensions".

WebExtensions have a completely different API than classical add-ons, and a much reduced set of capabilities to hook into the user interface. For Enigmail to continue to work, it would therefore be required to rewrite it from scratch. However, that's beyond our available time limitations.

We have therefore agreed with the Thunderbird developers that it's much better to implement OpenPGP support directly in Thunderbird. The set of functionalities will be different than what Enigmail offers, and at least initially likely be less feature-rich. But in our eyes, this is by far outweighed by the fact that OpenPGP will be part of Thunderbird and no add-on and no third-party tool will be required.


If you prefer to continue using Enigmail over migrating to the OpenPGP functionality in Thunderbird, then check out the following alternatives. Both are and will be fully supported by Enigmail for the foreseeable future:

  • Postbox: a commercial mail client, available for Windows and macOS.
  • Interlink Mail & News: a free open source mail client available for Windows and Linux

We are happy to announce Enigmail 2.0.12 for Postbox 7!

Postbox is a commercial email client based on Thunderbird. We have cooperated with the Postbox developers to make Enigmail ready for their newest version, Postbox 7. With version 7, Postbox introduces a new feature called "Lab Experiments", and we are proud to announce that Enigmail is the first "experiment" available.

Compared to Enigmail on Thunderbird, there are a few notable differences in functionality:

  • No support for the pEp Junior mode on Postbox
  • Composing messages is restricted to PGP/MIME (no support for composing Inline-PGP messages)
  • No Enigmail Header Bar when reading messages - click on the pen/lock icon to get details about the decryption/verification status
  • The Enigmail menu is only available when composing messages