I am finding a problem with users replying via email to reopen a ticket as well. It essentially makes a brand new ticket, which it shouldn't. It should keep the same ticket number. I have users that keep tabs on their tickets and respond to their old closed tickets because it has the ticket history in it for their reference. Creating a new ticket number and going through the rigmarole of essentially "spamming" the same content as a new ticket to our users is unsatisfactory.
When a user reopens a closed older ticket, only 1 thing should happen, it reopens the ticket.
However, we don't want users to reopen the ticket via email. For example, I close the ticket and the user responds with a "Thank you" response. I don't want the ticket to reopen. The only place that a ticket should be reopened is in the portal. If a user responds to a closed ticket via email, a notification to the assigned agent should be sent, but the ticket will remain closed. Thus, the initial reason for this topic.