Q: How can I tell if I responded to an email without opening it back up?
A: Take a look inside a ReplyManager folder. Next to the email, you will see either a red or green arrow. The green arrow (see below) indicates that the last action on this email was a message sent from your company. A red arrow indicates that the last message was sent by a customer (and likely needs to be replied to).
Users can also hover his or her mouse over the Email ID to see a preview of the email. This will show them up to 400 characters of the most recent correspondence.