Enigmail is an add-on to the email clients Interlink Mail & News, Postbox and Mozilla Thunderbird (up to version 68), allowing users to access the authentication and encryption features provided by GnuPG. Thus Enigmail enables Postbox and Interlink to send and receive digitally signed and/or encrypted messages using the OpenPGP standard.

In order to provide the crypto-features, Enigmail requires GnuPG to be installed. Minimum version required is 2.0.14, but we recommend the latest versions of GnuPG as they contain the latest security fixes. If your operating system does not supply GnuPG by itself, you may download GnuPG for Windows or other systems.

GnuPG 2.2.x is recommended for general use. GnuPG versions 2.0.x are end of life since December 31, 2017. The 2.0.x versions are still supported, but no longer recommended. Support will be dropped in medium term.

Main Features

  • Encrypt/sign mail when sending, decrypt/authenticate received mail

  • Support for inline-PGP (RFC 4880) and PGP/MIME (RFC 3156)

  • Per-Account based encryption and signing defaults

  • Per-Recipient rules for automated key selection, and enabling/disabling encryption and signing

  • OpenPGP key management interface

Please see the Features page for a full list of Enigmail's features.

 

System Requirements

Windows

Windows 8 or Windows 10

macOS

macOS 10.9 or newer

Linux

Any system that is supported by Interlink Mail & News

 

Quick Start

For a quick start guide, please see the Installation Manual.

Our Handbook is a complete reference manual, containing a quick start section.