To delete POP3 items from the POP3 server as they are downloaded:
Click Accounts > Account Options.
Double-click the POP3 account, and then click Advanced.
Deselect Leave a copy of messages on the server, and then click OK.
If you select both Leave a copy of messages on the server and Remove from server after __ days, the POP3 items are deleted from the POP3 server the specified number of days after the item is downloaded.
If you select both Leave a copy of messages on the server and Remove from server after deleting from Trash, the POP3 items are deleted from the POP3 server when you manually empty them from the Trash. If GroupWise automatically empties your Trash, the items are not deleted from the POP3 server.