POP "leave on server " simply downloads the all mail in the mailbox
(headers/messages/attachments) that hasn't previously been
downloaded by that client and then leaves any messages on the
server that have been downloaded within the "leave on server" time
period deleting mail downloaded prior to that time span.
good for being able to access read and write (if not send) mail off
line, slow particularly on dial up.
'
I'm pretty sure IMAP allows you to ONLY download the headers so you
can then download the message body when you want to read it. good
for mobile devices or dialup/satellite access but can't read mail
that hasn't been already read (or selected to download) when offline
Yup, you're correct. Good point.
Andrew
