Thunderbird/Enigmail

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Enigmail is a Thunderbird extension that allows writing and receiving email signed and encrypted with the OpenPGP standard. It relies on the GnuPG.

Note: Enigmail functionality will be integrated into Thunderbird 78, planned for release in summer 2020.[1]

Installation

Install the thunderbird-extension-enigmail package.

Usage

Sharing the public key

To distribute the public key one may upload it to a keyserver.

Encrypting emails

Encryption does not always work properly with emails containing HTML. It is best to use plain text by choosing Options > Delivery Format > Plain Text Only in the new email window.

Once the email is finished it can be signed through the OpenPGP menu.

Decrypting emails

Assuming that the email was encrypted properly, just trying to open it should result in a pop-up asking to type in the keyphrase.

See also