Squadmail drags email into the collaborative age
Forwards and CCs are the mechanisms that make email suitable for many-party conversations. They are also very inefficient, which is why services such as Yammer do so well, but email's extreme standardization makes it ubiquitous, so those are the tools we use.
Enter Squadmail, which has one of those ideas that seems quite obvious in retrospect: shared, cross-client email folders for collaboration.
