Hallo Jack,
das scheint "normal" zu sein. Aus der Knowledge-Base (Artikel #1097242):
All POP3 clients, Notes and non-Notes, are responsible for using the Unique ID Listing (UIDL) command to identify messages on the POP3 server that have already been pulled by the client.
If "Leave mail on server" is set to "Yes" for a Notes POP3 client, any pulled mail that has not been deleted locally will not be pulled again from the POP3 server in subsequent sessions. If the same Notes POP3 client deletes any of those pulled messages, those same messages will continue to be pulled from the server as new messages until they are (1) marked as Read for that user's ID (in the mail file's Unread ID Table), (2) deleted from the server's mail file, or (3) retained locally on the client instead of being deleted.
Gruss
Manfred