While I appreciate your stance and your response, it’s quite difficult to control what users add to the ticketing system. What if the user accidentally clicks the wrong file and ends up uploading the financials for the company or classified information or any other number of BadThings™ to end up in Zammad? We, the end users of the system, are requesting a way to be in compliance with legal requirements and having a setup whereby we are encouraged not to purge erroneous attachments leaves us potentially exposed to legal action and is, quite frankly, unacceptable.
I sincerely hope that your stance on this request changes in the future.