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 can use its own built-in library, or GnuPG. For GnuPG, the 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.
Encrypt/sign mail when sending, decrypt/authenticate received mail
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.
Windows 8.1 or Windows 10
macOS 10.9 or newer
Any system that is supported by Interlink Mail & News
For a quick start guide, please see the Installation Manual.
Our Handbook is a complete reference manual, containing a quick start section.