What tools could we consider to help with this? Ideally all emails would go into a queue, with possibility to pre-filter emails to specific users based on some criteria. All members could access all threads, but more importantly, there would be a single overview where it's easy to identify whether a customer/vendor has been helped or responded to. If not, flag it yourself and take care of it.
I tried searching around, but was not very successful if there's another similar question I'll gladly check it out. Thanks!