How to mark email message as private or confidential in Outlook?
In Microsoft Outlook, you can mark an outgoing email message or all outgoing email messages as private or confidential, which can remind recipients of keeping that message as private. In this tutorial, I will show you how to mark email message as private or confidential in Outlook.
Mark an email message as private or confidential in Outlook
Mark all email messages as private or confidential in Outlook 2010 and 2013
Mark all email messages as private or confidential in Outlook 2007
Mark an email message as private or confidential in Outlook
If you want to mark a single outgoing email message as private or confidential, please do as follows.
1. Create a new email message.
2. In the "Message" window, please click "File" > "Info" > "Properties". See screenshot:

In Outlook 2007, please click the "Office Button" > "Properties".
3. In the "Properties" dialog box, please select "Private" or "Confidential" from the "Sensitivity" drop-down list. And then click "Close" button to exit the dialog box.

In Outlook 2007, please select "Private" or "Confidential" from the "Sensitivity" drop-down list under "General" tab, and then click "OK" button.

4. Compose your email message, and click "Send" button to send it.
When recipients received your message, it will display the following information in the email header to remind the recipient to treat this email as Private or Confidential.

Note: This function is only applied to the current message, if you create another new message and send it, this function will not take effect.
Mark all email messages as private or confidential in Outlook 2010 and 2013
For marking all outgoing email messages as private or confidential in Outlook 2010 and 2013, you can do as follows.
1. Please click "File" > "Options".

2. In the "Outlook Options" dialog box, please click "Mail" in the left pane, then go to the "Send messages" section, select "Private" or "Confidential" from the "Default Sensitivity Level" drop down list. And finally click "OK" button. See screenshot:

From now on, when you sending an email message, it will be marked as private or confidential automatically according to your configuration above.
Mark all email messages as private or confidential in Outlook 2007
In Outlook 2007, you can mark all email messages as private or confidential as following steps.
1. Please click "Tools" > "Options" to open the "Options" dialog box.
2. In the "Options" dialog box, please click "E-mail Options" button under "Preferences" tab.

3. Click "Advanced E-mail Options" button in this "E-mail Options" dialog box.

4. In the "Advanced E-mail Options" dialog box, please select "Private" or "Confidential" from the "Set sensitivity" drop-down list under "When sending a message" section. And then click "OK" button.

5. Click the "OK" buttons in the following two dialog boxes to finish the whole settings.
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