Settings & security

Theme, language, sessions, privacy and encryption.

Theme & language

Astreo offers a light and a dark theme — switchable by click or following the system. The interface language can be switched between German and English.

Active sessions & devices

Under the security settings you see your active sessions (signed-in devices). You can end individual sessions or sign out on all other devices — useful if you signed in on someone else's computer.

Privacy & encryption at rest

• Astreo is hosted in the EU.
• Credentials and OAuth tokens are stored encrypted at rest (AES-256-GCM), never logged in plaintext.
• Mail content is processed solely to deliver the service, not for advertising.

Details are in the privacy policy.

Deleting your account & data

You can disconnect individual mailboxes at any time or delete your account entirely. On deletion the associated data is removed. Since Astreo is only a client, your mail remains with the original provider.