If your email client displays "Undisclosed Recipients"
instead of the To: field (receiver) of the email which you addressed?
This may seem odd at first sight, even disturbing, but this only means that the sender sent the letter by putting all the recipients in blind carbon copied (Bcc or Bcc field of your email software)
and individual recipient ( Field A: or To:).
Thus, if addressed, this field is automatically filled by the value "Undisclosed Recipients"
which means that recipients are "hidden
This document, titled « Email Clients - Undisclosed Recipients », is available under the Creative Commons
license. Any copy, reuse, or modification of the content should be sufficiently credited to CCM