Enigmail is a useful and simple Thunderbird extension featuring automatic encryption, decryption and integrated key management functionality. The Enigmail extensionadds OpenPGP message encryption and authentication to your email client. It enables you to write and receive email messages signed and/or encrypted with the OpenPGP standard.Features Encrypt/sign mail when sending, decrypt/authenticate received mail Support for inline-PGP (RFC 2440) 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 Automatically encrypt attachments for inline PGP messages Powerful GUI for easy configuration and management User Preferences for advanced configuration Integrated OpenPGP PhotoID Viewer Supports OpenPGP key retrieval via proxy servers Integrates with GnuPG Works with the Mozilla Thunderbird, Mozilla Suite, and Netcape 7.x mail clients Supports Thunderbird's Multiple Identities feature Language Packs available for localisation