Common Communication location

Common Communication location

HI all, for our office we usually have 3/4 different users interact with any given project/task. I really like the fact we can CC an email to have it go into the comments. But when you close the task, you end up 'losing' visibility to that communication. Other than creating a task {common comms} where we would use to 'dump' email communications in there, how do you manage this type of communication?

Thanks