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Barracuda Email Gateway Defense
formerly Email Security

Barracuda Outlook Add-In User Guide

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This article refers to the Barracuda Essentials Outlook Add-in for customers not currently using Microsoft Office 365. 

The latest Barracuda Email Protection Add-In supports Outlook and Outlook Web Access (OWA) for Microsoft Office 365. For setup details, see How to Deploy the Barracuda Email Protection Add-In and Using the Barracuda Email Protection Add-In.

The Barracuda Essentials Outlook Add-In supports Microsoft Exchange Server 2013, 2016, 2019, Outlook versions 2016, 2019, 2021, and Outlook Web Access (OWA) running on Windows and Mac OS.

Note that the UI can vary depending on the device you are using to access the add-in.

For setup details, see How to Deploy the Barracuda Outlook Add-In.

Use the Outlook Add-In to access your messages and send encrypted messages via Outlook or OWA.

Once the add-in is installed, you can take the following actions with messages:

  • Send encrypted emails;

  • Mark emails as suspicious and send to Barracuda Networks for further analysis;

  • Provide additional feedback as to why the email should be blocked.

Note: If the Outlook Reading Panel is disabled, the icon may be grayed out when you select a message. In this case, double click to open the message in the reading window to activate. You can now take actions on the message.

Send Encrypted Messages

Encrypt outbound messages for secure message transmission. To encrypt an outbound message:

  1. Log into Outlook or OWA, and select to create, forward, or reply to a message.
  2. Click the Barracuda Essentials logo to open the Actions panel.
    • OWAClick the Barracuda Essentials logo in the lower right of the new message
    • Outlook Click the Encrypt Message button in the Outlook ribbon.
  3. By default, Encryption is off. Click to toggle Encryption to on. The encryption attachment is added to the message:
    Encryption in OWA

    Encryption in Outlook


    Do not delete the attachment; if deleted, the message will not be encrypted.

    In Outlook:

    • When the message is encrypted, the Encryption (IconEncryptionOn.png) icon displays at the top of the message.

    • If you turn off encryption from the Actions panel, the message is not encrypted and the Encryption Off (IconEncryptionOff.png) icon displays at the top of the message.

  4. Complete your message, and click Send to send the encrypted message.

Take Action in the Actions Panel

Open the Actions panel to access actions. The actions are described after the common task of opening the Actions panel.

Open the Actions Panel

To open the Actions panel:

  1. Log into OWA.
  2. Select an email, then click the Barracuda Essentials logo in the top right of the page.
  1. Log into Outlook.
  2. On the main Inbox page, click the Barracuda Essentials logo in the Microsoft ribbon.
Submit as Suspicious

Click to flag messages that are potentially harmful or unwanted – including phishing, spear-phishing, spam, or impersonation emails.

Flagging suspicious emails can help protect other users in your organization. Flagged messages are:

  • Submitted to Barracuda Networks for analysis and improving email protection.
  • Sent to your organization’s administrator for review. (Requires Incident Response.)

Additionally, users can provide feedback as to why the message is thought to be suspicious.

To submit an email as suspicious:

  1. Open the Actions panel as described above.
  2. Click Report & Provide Feedback. Alternatively, you can click Report this message without providing additional feedback to bypass the additional feedback form.

  3. The currently selected message is submitted to Barracuda as suspicious and is immediately moved to the Deleted Items folder, or the folder specified in your Preferences, described below.
  4. After the email is submitted, if you opted to provide feedback, you will be redirected to a new browser window to provide additional details about the submission. Your feedback is extremely important to us. Providing additional details will help us improve our systems and allow better understanding of your email preferences.


    If your add-in is displaying differently than the above, remove and reinstall the add-in using How to Deploy the Barracuda Outlook Add-In.

Set Your Preferences
  1. Open the Actions panel as described above.
  2. Click Preferences.
  3. Choose the Outlook folder where you want to send emails you report as suspicious. By default, emails are sent to your Deleted Items folder. Click Back.
Manage Your Sender Policy
  1. Open the Actions panel as described above.
  2. Click Manage your sender policy. You are directed to the Email Gateway Defense Sender Policy page where you can allow or block messages from certain domains. Note that you might need to log in first.

This feature is only available if your administrator has enabled it. It is not available for everyone.