You can not actually get them - the information is not sent with the email.
You can try replying all and ask for a "confirm on receipt" reply. You may be lucky and get the receipts but it depends on how the mailing list has been set up.
That information is protected by Yahoo, and would most likely require a court order.
salary undisclosed
The Undisclosed ended on 2006-04-28.
The duration of The Undisclosed is 2700.0 seconds.
The Undisclosed was created on 2006-04-03.
He was awarded an undisclosed amount in final settlement.
Undisclosed Desires was created on 2009-11-16.
Microsoft acquired Skype for an undisclosedsum.The secret was undisclosed to my friends.
Undisclosed Files Addendum was created on 1995-02-27.
An undisclosed fracture is a broken bone that is not apparent on examination. Often these kind of fractures are only discovered after they are healed.
Disclosed
Bcc is blind or blank carbon copy. It is used when sending email to undisclosed individuals. Example, correspondence between you and an employee where the initiator of said conversation uses the bcc to a boss or other individuals and recipient of initial email doesn't know and can't see (blind) who ALL can also read email.