SMTP Service for Local Devices/or specific app

[cy-bertrand]

Tutanota provides end-to-end encryption for emails, ensuring maximum privacy. However, there is currently no SMTP service that allows local devices (e.g., printers, scanners, home automation systems, NAS, ...) to send emails to a (Tutanota or any other) mailbox without relying on third-party services like Gmail or Outlook. This forces users to expose message content to external servers, which contradicts Tutanota’s privacy-first philosophy.

Problem:
Local devices often require an SMTP server to send notifications or documents via email. The lack of a dedicated SMTP service forces users to use insecure solutions or third-party providers, compromising confidentiality.

Proposal:
Implement a minimal SMTP service that:

• Enables sending emails from local devices / specific app
• Uses secure authentication (e.g., app-specific password or token).
• Guarantees that emails passing through this service are not stored and are deleted immediately after delivery.

Benefits:

• Reduces dependency on third-party services (Google, Microsoft, etc.).
• Not perfect but greatly improves user privacy even for devices that do not support end-to-end encryption.

[kunscht]

Please add this