How to View the Bcc Recipients of Your Sent Emails
When you send somebody a Bcc of an email using the Mail application on a Mac, that recipient’s name and address don’t appear in the email, so other recipients don’t see who else received the message. This is the point of Bcc—to protect the recipients’ privacy. At some later point, however, you might want to view the names of all the people to whom you sent that email. To find out who you sent a Bcc of a Mail message to:
How to Add Bcc Field to Your Outgoing Emails
If you send emails that include Bcc recipients frequently, you can add the Bcc field to the header of each new email you send automatically. Next to the recipient in the To line is Bcc, followed by an ampersand and the number of additional recipients. If there were two additional recipients of the original email, it reads & 2 more, for example.
To always have a Bcc field in Mac Mail: Each new email message you begin now contains the Bcc field in addition to the usual To, Subject, and From fields.
How to Manually Add or Remove the Bcc Field
If you prefer to add the Bcc field on the fly only when you need it or remove it when you don’t:
