Using Protected MFT dropbox™
A protected mode for MFT Dropbox™ requires external senders to register and authenticate before uploading files.
When you click a protected MFT Dropbox™ link, you will be directed to a login or registration page. For more information, refer to Secure Message Login – Registered Recipient Login.

After the registration, the From field is populated with the registered sender's information. To enable this on your site, contact support.