Undisclosed said:
I know I can send it bcc. But I recieved an email from a friend and
they used undisclosed recipient
What the receipient sees in the "To" field when receiving a Bcc'd message is
up to the receiving client, usually. I use one client that will show my
address. Outlook Express, I believe, shows "Undisclosed Recipient".
You can control it to a degree, though. Create a new Contact named
"Undisclosed Recipient" and give it yor own address. Then when you create a
message, put that contact in the To field and all others in the Bcc field.