Add-ons
Retyc 1.1.1
by emantel-triplestack
Encrypt and upload large files with to Retyc. Recipients with a Retyc account get E2E encryption; others access files using a passphrase.
About this Add-on
Retyc for Thunderbird automatically intercepts outgoing emails with attachments, uploads them to Retyc, and replaces the attachments with a secure download link — all before the message is sent.
How it works
End-to-end encryption
Features
Privacy & compliance
A free Retyc account is required. Requires Thunderbird 115 or later.
How it works
- Click Send as usual. If your email has attachments, the extension opens a confirmation dialog.
- Review the files and recipients, then click Upload & Send.
- Attachments are encrypted on your device and uploaded to Retyc. The original attachments are removed and a download link is added to the message body.
- The email is sent — recipients just click the link to download the files.
End-to-end encryption
- Recipients with a Retyc account receive files encrypted with their public key — only they can decrypt them.
- Recipients without an account access files via a passphrase you set (minimum 8 characters).
- Files are encrypted on your device before upload. Retyc cannot access your files or their names.
- Post-quantum hybrid keys, resistant to future quantum computing attacks.
Features
- Configurable transfer expiry (default: 7 days)
- Auto-send mode or manual 2-step mode
- Per-message kill switch to bypass the extension when needed
- OIDC device flow login — authenticate directly from Thunderbird
- Compatible with self-hosted Retyc instances
Privacy & compliance
- 100% European — servers hosted in the EU, no AWS, Azure, or Google Cloud
- Zero-knowledge architecture — Retyc cannot read your files
- GDPR-compliant by design, no telemetry, no AI processing
A free Retyc account is required. Requires Thunderbird 115 or later.
