Schleuder

Schleuder is a mailing list manager designed for secure group communication using OpenPGP. It acts as an email gateway for a group, handling encrypted list mail and enabling controlled remailing to recipients outside the list.

Key Features

• OpenPGP-encrypted mailing list workflows for subscriber group communication
• Email gateway behavior: accept mail from subscribers and non-subscribers
• Remailing capabilities to send messages to non-subscribers via the list
• List administration features for managing subscribers and list behavior

Use Cases

• Secure internal communications for activist groups, NGOs, and collectives
• Encrypted mailing lists for teams that must interact with external recipients
• Privacy-focused discussion lists that require OpenPGP-based message handling

Limitations and Considerations

• Requires participants to use OpenPGP correctly (key management, verification, client support)
• Operational complexity is higher than typical plaintext mailing list setups due to encryption workflows

Schleuder is well-suited for groups that want mailing-list simplicity while keeping email content protected with OpenPGP. It provides a practical bridge between encrypted subscriber discussions and optional remailing to external contacts under list control.