I hope that everyone reading this knows when and how to use blind copy (Bcc:) for emails. If not then you can review it here.
A feature I miss from modern email programs is the facility to create a blind distribution list which saves having to remember and also has a title. A mainframe mail system we used in the eighties had this feature. That way you just sent the email to the list and the program used the title in the “To:” field and sent to everyone using Bcc. A useful extension of this feature would be to allow you to specify in the distribution list who should get it in clear and who should get it blind. It would be very useful for circulating minutes etc.