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When sending a group email, sometimes you don’t want to display all of the group member emails in the “To” field of the email, as it’s visible to everyone. Another reason might be that if any of the recipients click “reply all”, they will inadvertently send a message to everyone listed. The trick is to use the “Bcc” field for the group. “Bcc” means “Black Carbon Copy”, which basically means that the Bcc field is not visible to the email recipients

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