Make Outlook Appear to Send Emails to Undisclosed Recipients

If you are sending out emails to multiple people and want to protect their emails you use the Bcc field. If you want to let people know you are doing this you can tell them in the message, or you can just set a custom “To” name that implies it.


Have you ever seen an email that said it was sent to “Undisclosed Recipients” because it didn’t reveal who the message was sent to? You can do this in Outlook and it’s a fairly simple trick that can make your mass emails seem either mysterious or more professional. Even if you aren’t using mass emails, this is a neat technique for protecting the privacy of those you are sending emails to by not revealing their addresses and simultaneously using the “To” field to let people know that the message was sent to multiple people.

In Outlook 2013 go to the People pane and then click the New Contact button on the Home ribbon.


A new dialog window will appear. Enter in the Full Name as “Undisclosed Recipients” and in the section underneath enter in your own email address on the E-mail line.


If you’ve already added your own email to your contacts you’ll receive a Duplicate Contact Detected notification. On this window mark the “Add new contact” bullet and click Add.


Now to make emails display that they have been sent to “Undisclosed Recipients” go back to the Mail pane and click the New Email button.


In the new message window that appears click the To… button.


A small contacts dialog box will appear.

  • On the To line enter in “Undisclosed Recipients” and Outlook should automatically insert the full email.
  • On the Bcc line enter in the rest of the people you wish to send the email to.

Note: It’s important to distinguish the difference between Cc and Bcc here. Bcc does not disclose the email addresses of recipients, however Cc does. If you want to protect the email addresses of your recipients remember to always use Bcc.

Push OK to add the recipient info to the message.


Alternatively you can enable the Bcc line in the Options ribbon by clicking the Bcc button. This way you don’t need to go into the contacts menu in the step above mentioned with the To… button.


The result will show that the message was sent to “Undisclosed Recipients” just like in the screenshot below.




  1. Valter

    So you’re sending mail to yourself not the list of recipients or distribution list..

    • Austin Krause

      Good question valter!

      This does send a copy of the message to yourself. However the message is sent to everyone who is listed on the Bcc line.

      “Bcc stands for blind carbon copy which is similar to that of Cc except that the Email address of the recipients specified in this field do not appear in the received message header and the recipients in the To or Cc fields will not know that a copy sent to these address…”

  2. Kate

    Austin, does this only work in Outlook 2013? We still have Outlook 2010 and this is something that would be of great use to us. But when I tested it, the “To” field read my name instead of “Undisclosed Recipients”. Or does this not work for an internal email due to the Global Address Book overriding with my name? Hmmmm. Would love to figure out hot to get this to work . . .

    • Austin Krause

      Hi Kate,

      It should work with Outlook 2010, though the direction and button locations may be a little different. Whether or not it overrides your name will depend on your exchange server’s settings.

  3. Ken

    How do I send mass email and each addressee receives the email with their email address in the To line, however no other recipients addresses are shown?

  4. consolata

    is there a way I can send an email and the recipient does not know that he/she has been bcced?

  5. Jerry

    This does not work. My name appears on the To line rather than Undisclosed Recipients

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