Postbox

Postbox for macOS and Windows is a power email app that has the ease of use of Apple Mail, but with more features and configuration options to handle high-volume workloads. Enigmail for Postbox, an add-on that uses GnuPG to implement the OpenPGP standard ¹, enables email encryption and signing directly within the app.

Key Facts

• Developer/Publisher: Postbox, Inc.
• License: Proprietary (Closed Source)
• Encryption Library: OpenPGP (Open Source)
• Price:
  • 1-Year License: $29.00
  • Lifetime License: $59.00
• Web: https://postbox-inc.com
• Help:
  • Documentation and Help Center
  • Twitter

1. GnuPG only supports OpenPGP up to RFC4880+RFC5581+RFC6637 and newer versions generate incompatible formats by default ↩