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Tightly integrated support for OpenPGP Epyrus, SeaMonkey and Postbox. Mozilla Thunderbird was supported up to version 68.
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Encrypt/sign mail when sending, decrypt/authenticate received mail
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Support for PGP/MIME (RFC 3156), and inline-PGP (for reading only)
- Support for automatic key discovery and exchange via Autocrypt.
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Per-Identity based encryption and signing defaults
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Per-Recipient rules for automated key selection, and enabling/disabling encryption and signing
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Integrated OpenPGP key management user interface
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Automatically encrypt or sign attachments for inline PGP messages
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Powerful GUI for easy configuration and OpenPGP key management
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Detailed user preferences for advanced configuration
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Integrated OpenPGP PhotoID viewer
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Integrates with GnuPG, version 2.2.x (recommended) and 2.0.x (old version, support ended 2017)
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Supports Mozilla's Multiple Identities feature
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Official release for all platforms supported by the mail clients (Windows, Linux, Mac OS X, Solaris, *BSD)
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Many languages are included in the official releases