I think this statement really shows how our expectations of privacy have changed. You'd prefer GMail for it's privacy - That's the mail service that 'reads' you

I think this statement really shows how our expectations of privacy have changed. You'd prefer GMail for it's privacy - That's the mail service that 'reads' your email and displays adverts based on it's content. Google clearly have the ability to access the plain text of your email so I'd be really surprised if they don't do some kind of storage de-duplication too. (Unless of course you were being ironic and I misread you)