Thunderbird Extension
The Retyc extension for Thunderbird lets you send large files directly from your email client, without leaving Thunderbird. Files are end-to-end encrypted and shared via a secure Retyc link.
Outlook Extension
The Retyc extension for Outlook lets you send large files directly from your email client. Files are encrypted client-side and uploaded directly to Retyc — they never go through Outlook attachments.