We have email templates that specifically request clients not to reply unless they have additional info for a case. We specifically (politely) contact repeat offenders to explain what that means, but still clients reply to final resolution emails with a courtesy "thanks" or "great" or "finally!".

The result is that after we have set a Case to CLOSED (Responded), we continually get replies from clients that reactivate the Case in question. That's just one more thing to deal with on a case that we thought was closed for good. It's small, but it's annoying.

Is there any way that anyone has found to avoid this problem?

:)
Please only post answers with additional information. Courtesy non-answers will extend the life of this question or otherwise result in unnecessary time being spent. thanks
:)