How to send to "undisclosed recipients" - Mozilla Thunderbird

You know those emails you sometimes get, that are not addressed specifically to you, but rather to "undisclosed recipients"? They are usually event invitations or newsletters to a wider audience, where it should not be possible to see everyone's email address for privacy reasons.

So now you need to write such an email yourself. But how to create this mysterious "undisclosed recipients" addressee, and prevent other emails to be seen?

How to go about it depends on your email client, and here we will show how it is done in Mozilla Thunderbird. It is surprisingly easy, and the answer is easily found on their support website:

If there is no entry in the To: field but only in the BCC: then the mail will be sent to all the BCC recipient(s) and the mail will be displayed to recipients as being sent to "undisclosed recipients" or similar wording by the receiving email program.

In concrete terms, this means:

1. Leave the To: line empty
2. Leave the CC: line empty
3. Put all the addresses in the BCC: line

Et voilà! That's all it takes.