schleuder 3.4.1-2 (s390x binary) in ubuntu focal

 Schleuder is a 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.
 .
 Version 3 of schleuder is a complete rewrite, which aims to be more robust,
 flexible, and internationalized. It also provides an API to be used with
 schleuder-cli and/or schleuder-web.