Enigmail is a seamlessly integrated security add-on for Mozilla Thunderbird, Interlink Mail & News and Postbox. It allows you to use OpenPGP to encrypt and digitally sign your emails and to decrypt and verify messages you receive.
Enigmail uses inter-process communication to execute GnuPG to create OpenPGP signatures, encrypt and decrypt mail, etc.
You can tell Enigmail to automatically encrypt outgoing emails.
Key Features
- Integrated support for OpenPGP with the Mozilla Thunderbird and Mozilla Seamonkey mail clients.
- Encrypt/sign mail when sending, decrypt/authenticate received mail.
- Support for inline-PGP (RFC 4880) and PGP/MIME (RFC 3156).
- Per-Identity based encryption and signing defaults.
- Per-Recipient rules for automated key selection, and enabling/disabling encryption and signing.
- OpenPGP key management user interface.
- Automatically encrypt or sign attachments for inline PGP messages.
- Powerful GUI for easy configuration and OpenPGP key management.
- Detailed user preferences for advanced configuration.
- Integrated OpenPGP PhotoID viewer.
- Supports OpenPGP key retrieval via proxy servers.
- Integrates with GnuPG, version 1.4.x and 2.0.x.
- Supports Mozilla’s Multiple Identities feature.
- Supports Autocrypt exchange of cryptographic keys
- Many Language Packs, (mostly) included in the official releases, and available separately for localization of contributed builds.
Website: www.enigmail.net
Support: Documentation, FAQ, GitLab Code Repository
Developer: Patrick Brunschwig
License: Mozilla Public License (MPL) 2.0

Enigmail is written in JavaScript. Learn JavaScript with our recommended free books and free tutorials.
Related Software
| Email Encryption Tools | |
|---|---|
| GnuPG | Encrypt and sign data and communication |
| OpenPGP | Authenticating or encrypting data, using public key cryptography |
| Mailvelope | Extension for Google Chrome and Mozilla Firefox |
| Enigmail | OpenPGP Email Security for Mozilla Applications |
| LibrePGP | Updated specification of the OpenPGP encryption standard |
| Mymail-Crypt for Gmail | Simple solution to mail encryption; not affiliated with Google |
Read our verdict in the software roundup.
Explore our comprehensive directory of recommended free and open source software. Our carefully curated collection spans every major software category.This directory is part of our ongoing series of informative articles for Linux enthusiasts. It features hundreds of detailed reviews, along with open source alternatives to proprietary solutions from major corporations such as Google, Microsoft, Apple, Adobe, IBM, Cisco, Oracle, and Autodesk. You’ll also find interesting projects to try, hardware coverage, free programming books and tutorials, and much more. Discovered a useful open source Linux program that we haven’t covered yet? Let us know by completing this form. |

