In a workplace - especially in larger companies - email seems to be coming a totally increasing waste of time.
I'd like a facility to BLOCK any email that is CC'd to say more than 3 people -- In my view if an email is CC'd to every man and his dog then it's not important or even worth reading. If it's a "company wide" event you would have heard about it anyway.
Sometimes in the workplace I don't bother with email for weeks now (until I get a call from I.T services saying you "Inbox" is full --then I just empty it without even reading what's in it). If an Item is "Urgent" then I'm usually contacted by other means.
I find the instant messaging system a FAR far better system than email since you've got a "Live" one to one dialog session or even "bog standard" phone texts.
Email was a great idea but I think it's become SO unproductive now that it's almost unusable for serious work.
For attachments etc a smart phone can handle these where you can download the document to a PC.