Here is my problem:

1. I am using Yahoo Business Email.
2. I was using Outlook 2002/XP as my email client before I got a new
Windows image with Outlook 2003 installed.
3. I moved 2002 PST file to the new desktop; create POP email account
identical to the one exit in previous machine, with delivery location
to that old PST file.

The Problem: when performing Send/Receive, it seems Outlook doesn't
recognize that emails are already in the PST and starts downloading the
whole punch of emails exist in my account whether they are new or not,
which leave inbox with duplicate emails.

I thought Outlook keeps a list of downloaded emails in PST file itself
so it won't get them again.

And idea?

Thanks in advance.