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Enigmail adds OpenPGP message encryption and authentication to your email client. It features automatic encryption, decryption and integrated key management functionality. Enigmail requires GnuPG (www.gnupg.org) for the cryptographic functions, which is not included in the installation.

Features List

Tightly integrated suport for OpenPGP with Mozilla Thunderbird and Mozilla Seamonkey (and other Mozilla-based 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

Integrated 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, versions 1.4.x and 2.0.x