Upon processing the mailbox, should the system delete the message or email from your external mailbox?<br><br>If you select "No", the e-mails will stay in the external mailbox until you manually delete it.<br><br>If you select "Yes" the emails will be automatically removed from your external mailbox.<br><br>This option should be turn "ON" inorder not to retrieve the same messages everytime and to retrieve the next batch of messages from your external mailbox specially when you have messages more than the preference you specify.<br>