A few years ago, CC provided the ability to suppress certain addresses whe n you sent. For example, if you were sending a 2nd invitation to attend an even, you could upload the list of those who had already registered so the invitation would not be sent to them.
Recently, CC added a function which allowed you to resend an email to those who had not opened it previously. Now this appears to have disappeared, replaced by the ability to resend to recently added contacts.
HAS it disappeared? It was incredibly helpful. Or has it just been moved or renamed?