Schleuder is described as 'Gpg-enabled mailing list manager with resending-capabilities. Subscribers can communicate encrypted (and pseudonymously) among themselves, receive emails from non-subscribers and send emails to non-subscribers via the list' and is an app. There are 1 alternatives to Schleuder for a variety of platforms, including Mac, Linux, BSD, Self-Hosted and Python apps. The best Schleuder alternative is Mailman, which is both free and Open Source.
Mailman is integrated with the web, making it easy for users to manage their accounts and for list owners to administer their lists. Mailman supports built-in archiving, automatic bounce processing.
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