How can Send an Email to "Undisclosed Recipients" in Mozilla Thunderbird?

Create an Address Book Entry for "Undisclosed recipients"

To make mailing "undisclosed recipients" easier, let's first set up a special address book entry for that purpose:

·         Select Tools | Address Book (or Window | Address Book) from the menu in Mozilla Thunderbird.

·         Click New Card.

·         Type "Undisclosed" under First:.

·         Enter "recipients" under Last:.

·         Now type your own email address under Email:.

·         Click OK.

Send an Email to Undisclosed Recipients in Mozilla Thunderbird

To compose and send a message to undisclosed recipients in Mozilla Thunderbird:

·         Begin with a new message.

·         Click Contacts in the message's toolbar.

·         Highlight "Undisclosed recipients".

·         Click Add to To:.

·         Highlight all other desired recipients in the Contacts pane.

·         Drag and drop them to the second address field.

·         Click on that second address field's To:.

·         Select Bcc: from the drop-down menu.

·         Add additional recipients (not found in your address book) to the Bcc: field.

·         Separate them from the existing contacts and from each other with commas.

·         Of course, you can also use Mozilla Thunderbird address book groups to add multiple recipients in one go.

          Compose your message and eventually send it.