Send secure email right from Outlook (classic)
The Protected Trust add-in puts one-click encryption in your Outlook ribbon — no separate portal, no new inbox.
The Protected Trust Outlook add-in is the classic desktop add-in for Outlook (classic) on Windows. It adds the Protected Trust icon to your ribbon, so you can send HIPAA- and GLBA-compliant encrypted email without ever leaving your inbox. It installs as part of Send It Secure for Windows.
What you can do
| Encrypt with one click
Compose as usual, then click the Protected Trust icon so the Message Protected lock is on — your message sends securely. |
Secure or regular, your choice
Toggle protection per message: lock it to send securely, or leave it unlocked to send a normal email. |
Full message control
Revoke access after sending, set messages to expire, get read receipts, and apply organization-wide message policies. |
| Keep your address
Use your existing email address — nothing to migrate. And your recipients never need an account to open a secure message. |
Proof of Delivery
A real-time Proof of Delivery log shows exactly who opened each message and when — your compliance audit trail. |
Large file transfer
Send large files securely, well beyond the size limits of ordinary email. |
Built for regulated work. Send It Secure is built for dental, medical, financial, legal, and beyond. We maintain a SOC 2 attestation and enter into a HIPAA Business Associate Agreement (BAA) with every client — so you can meet compliance obligations with confidence.
See it in action
Watch one-click encryption right in the Outlook (classic) ribbon.
Get the add-in
The Protected Trust add-in installs with Send It Secure for Windows. Follow the steps in Install the Protected Trust Outlook COM Add-in.
On the New Outlook, Mac, or the web? This classic add-in is for Outlook (classic) on Windows. If you're on the New Outlook, Outlook for Mac, or Outlook on the web, use the cross-platform Send It Secure Outlook Add-in instead. Not sure which you have? See Which version of Outlook do I have?