Claws Mail

Claws Mail is a lightweight and fast email client based on GTK+ for Linux and Windows. It contains a plugin to enable email signing and encryption using GnuPG / gpgme ¹, implementing the OpenPGP standard.

Key Facts

• Developer/Publisher: Team of dedicated developers, translators and contributors
• License: Open Source (GPL)
• Price: Free. Donations welcome
• Web: https://claws-mail.org
• Help: Help is provided on their website
  • User Manual
  • FAQ

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