Enigmail extension for Thunderbird

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OpenPGP extension for Thunderbird. Enigmail allows users to access the features provided by the popular GnuPG software from within Thunderbird.

Enigmail is capable of signing, authenticating, encrypting and decrypting email. Additionally, it supports both the inline PGP format, as well as the PGP/MIME format as described in RFC 3156.

Similar applications: 
PGP