I think you're slightly under-estimating end users here - and the evolution of ISP technologies.
For one thing, web mail services like Hotmail are already showing people that their mail can be left on servers, and that attachments can be downloaded at leisure.
Re:
For one thing, web mail services like Hotmail are already showing people that their mail can be left on servers, and that attachments can be downloaded at leisure.
(no subject)