What Mary suggests below works fine.
The only problem I have with it is that if there is more then 3 or 4 new mails on the server, when outlook is first opened it will timeout and disconnect from the POP server after downloading 1 or 2 of them. You then have to cancel the original send and receive and do a send and receive manually. The 1 or 2 emails that did download will be duplicated.
I can`t use IMAP since i need that emails to remain on the server
How I would handle this depends on the reason for the above quoted line from your post.
If you have a legal reason to retain all e-mails on the server, I would definitely use the Bcc feature to archive a copy of ALL e-mail. You would not sound good in court saying:
"some dumb user deleted the email "accidentaly" "