Re: Perfect Mail Client
Actually if memory serves Exchange 2003, and 2007 to an extent, did do single instancing of messages / attachments.
They took it away in 2010 when storage became 'cheap' although I think even then 2010 did attachment compression.
Obviously the user would still be 'charged' for the logical space taken up by the storage limits but, especially with sales teams or accountants who insisted on e-mailing massive spreadsheets to each other, the size of the database could be way less than the sum of the individual mailboxes so to speak.
Biting the hand that feeds IT
