Gordon said:
...
She probably doesn't have a different email address. It's probably an ALIAS
of the master account. You need to set up a rule to not download email that
is not to your address....
Is such a rule available in Outlook? The OP didn't bother to mention
WHICH version of Outlook that they use. In OL2002, it is going to
download all messages BEFORE it exercises any rules against them. The
only "rule" that I know of that prevents downloading the e-mails is to
*not* have Outlook download only header (no bodies) or not download
those that exceed some user-specified size.
The OP needs to get 2 *real* e-mail accounts, not one of those cheap-ass
aliased accounts because of a penny-pinching ISP trying to save on
resources.